[Botany • 2019] Notes on the Genus Argostemma (Rubiaceae) from Lao PDR

Figure 1. Argostemma ebracteolatum. A. habitat, leaves and inflorescences; B. inflorescences and flowers. KS 728 (photos by K. Souvannakhoummane). 

A. pictum. C. habitat, leaves and inflorescences; D. inflorescences and flowers. Lanorsavanh 1075 (photos by S. Lanorsavanh).  

Figure 2. Argostemma verticillatum. A. habitat, leaves and inflorescences; B. inflorescences and flowers. Lanorsavanh 1085 (photos by S. Lanorsavanh).

in Lanorsavanh & Chantaranothai, 2019.  

 DOI:  10.20531/tfb.2019.47.1.06

ABSTRACT

Three species of Argostemma (Rubiaceae) are newly recorded for Lao PDR: A. ebracteolatum, A. pictum and A. verticillatum. Descriptions and photographs of the new records are provided, and a key to Argostemma in Lao PDR is presented.

KEYWORDS:  Agrostemma, key, new record, Lao PDR, taxonomy

INTRODUCTION

Argostemma Wall., a genus of Rubiaceae of ca 100 species in the Old World tropics, is largely confined to the South-East Asia (Robbrecht, 1988) but with two species in tropical West Africa (Sridith & Puff, 2000; Mabberley, 2008). For Lao PDR, Newman et al. (2007a) and Newman et al. (2007b) first recorded a species of the genus, A. laeve Benn., from Khammouan province. Lanorsavanh & Chantaranothai (2013, 2016) recorded three species A. laotica Lanors. & Chantar., A. neurocalyx Miq. and A. siamense Puff from Bolikhamxai province, and, most recently, Tagane et al. (2017) recorded an additional  species,  A.  lobbii Hook.f., from Bolikhamxai province.

During botanical surveys of the first author in northern Lao PDR, Luangphrabang Province in July 2014 with S. Souvanhnakhoummane, and Luangnamtha Province in August 2015 with C. Phongoudome and in the southern Attapeu Province in June 2014 with V. Lamxay, many unnamed specimens were collectedand identified and include new records for Lao PDR, viz Argostemma ebracteolatum E.T.Geddes, A. pictum Wall. and A. verticillatum Wall. In 1999, Sridith indicated the type specimens of A. ebracteolatum, A. pictum, A. pubescens, A. repens and A. rotundifolium were holotypes, but this is an error to be corrected to lectotypes, nevertheless the lectotypification was effectively done by him.

NEW RECORDS: 

1. Argostemma ebracteolatum E.T.Geddes, Bull. Misc. Inform. Kew  1927(4):  165.  1927.  

Type: Thailand, Chiang Mai, Mae Chaem (Me Cham), 14 Jul. 1922, Kerr 6276A (lectotype K! [K000760179], isolectotypes BK! [257307], BM! [BM000028695], designated by Sridith, 1999).

Ecology.— On limestone wet rock in mixed deciduous, deciduous and dry evergreen forests, 540–1,100 m alt.; flowering July and fruiting July to August.

Notes.— Argostemma ebracteolatum resembles A. thaithongae Sridith, endemic to Thailand, in the bell-shaped corolla and 5-merous flower, but differs in having not only being densely hairy on stem, leaves and inflorescence but also the exterior of the corolla. It is unlikely to be confused with other species in Laos as only A. neurocalyx has a bell-shaped corolla but is 4-merous.

2.  Argostemma  pictum Wall. in Roxb., Fl. Ind. (ed. Carey & Wall.) 2: 327. 1824. 

Type: Malaysia, Penang, 1892, Wallich, Numer. List 8392 (lectotypeK! [K000172892]; isolectotypes K! [K000172894], K-W!  [K-W001125373]  designated  by  Sridith, 1999), non Korth., 1851.

Ecology.— On moist sandstone rocks with soil or on wet ground in evergreen forests, 100–410 m alt.; flowering June to July and fruiting June to August.

Notes.— Argostemma pictum resembles A. neurocalyx but it distinguished by the wheel-shaped corolla which is 5-merous, and very strongly recurved with the tip coiled.

3. Argostemma verticillatum Wall. in Roxb., Fl. Ind. (ed. Carey & Wall.),  2: 325. 1824; 

Type: Nepal, Moreko, July 1821, Wallich,  Numer.  List  8394A(holotype K-W! [K-W001125376]). Fig. 2.

Ecology.— On moist rocks near small water-fall in evergreen forests, 740–2,200 m alt., flowering and fruiting July to August.

Notes.— Argostemma verticillatum is recognized by its curved filaments which its fused around the middle and forming a short filament tube. Because the Chinese species have free filaments (Chen & Taylor, 2011), therefore, we exclude China from the distribution information; further study is needed to clarify this character.

Figure 1. Argostemma ebracteolatum. A. habitat, leaves and inflorescences; B. inflorescences and flowers. KS 728 (photos by K. Souvannakhoummane). A. pictum. C. habitat, leaves and inflorescences; D. inflorescences and flowers. Lanorsavanh 1075 (photos by S. Lanorsavanh). 

Figure 2. Argostemma verticillatum. A. habitat, leaves and inflorescences; B. inflorescences and flowers. Lanorsavanh 1085 (photos by S. Lanorsavanh).

Soulivanh Lanorsavanh and Pranom Chantaranothai. 2019. Notes on the Genus Argostemma (Rubiaceae) from Lao PDR.  Thai Forest Bulletin (Botany). 47(1); 29-33. DOI:  10.20531/tfb.2019.47.1.06

  

[Botany • 2018] Scleria aureovillosa (Cyperaceae) • A New Species of Scleria P.J.Bergius from North-Eastern Thailand

Scleria aureovillosa Kiaosanthie & K.Wangwasit

in Kiaosanthie, Wangwasit & Chaisongkram, 2018. 

กกลูกขนทอง  || DOI: 10.20531/tfb.2018.46.2.01 

ABSTRACT

Scleria aureovillosa Kiaosanthie & K.Wangwasit, a new species of Cyperaceae from North-Eastern Thailand, is described and illustrated. It is closely related to S. benthamii C.B.Clarke but differs in the leaf and culm surfaces, culm shape, the absence of wings at the leaf sheath, contraligule features, nutlet morphology and micromorphology, and leaf and culm anatomy. An emended section of the key to the species in the Flora of Thailand account of Scleria is provided.

KEYWORDS:  anatomy, nutlet, Scleria aureovillosa, taxonomy, Thailand

Figure 2. Scleria aureovillosa Kiaosanthie & K.Wangwasit.
A‒B. part of inflorescence; C. nutlet; D. disk 3-lobed; E. rhizome; F. habitat.

Scleria aureovillosa Kiaosanthie & K.Wangwasit, sp. nov.

Similar to Scleria benthamii C.B.Clarke but differs in having trigonous culms (vs triquetrous in S. benthamii), an obtuse contraligule (vs rounded to truncate) and nutlets 2.1‒2.5 mm long (vs 2.6‒2.9 mmlong), subglobose to globose, terete, with a black, apiculate apex (vs ovoid, subterete to trigonous and obtuse apex) (Fig. 3 & Table 1). 

Type: Thailand, Loei, Phu Rua, 1,155 m, 12 Nov. 2012, Kiaosanthie WK 0152012 (holotype BKF [194620!]; isotypes KKU!, QBG!) (Figs. 1, 2 & 3A‒C).

Ecology.― Growing in seasonally wet, open grassy places on hillsides and on sandy soil; 100‒1155 m alt.

Vernacular.― Kok luk khon thong (กกลูกขนทอง).The Thai name translates as ‘sedge with golden hairs on the nutlet surface’.

Etymology.― The specific epithet of this new species is taken from the Latin aureus and villus, which refers to the distinctive feature of the species having golden villous hairs on the mature nutlet surface.

Wipawan Kiaosanthie, Kamolhathai Wangwasit and Wanwipha Chaisongkram. 2018. A New Species of Scleria P.J.Bergius (Cyperaceae) from North-Eastern Thailand. THAI FOREST BULLETIN (BOTANY). 46(2); 113–122.  DOI: 10.20531/tfb.2018.46.2.01

    

[Botany • 2018] Gentiana laotica • A New Species of Gentianaceae from Laos

Gentiana laotica  Soulad., Tagane & Yahara

in Souladeth, Tagane, Naiki, et al., 2018. 

ຫວິດຂາວ || DOI   10.20531/tfb.2018.46.1.11

ABSTRACT

A new species of Gentiana (Gentianaceae), Gentiana laotica Soulad., Tagane & Yahara, from Phou Khao Khouay National Protected Area, Vientiane Province, central Laos, is described. Photographs, vernacular name, DNA barcodes of rbcL, matK and ITS, and preliminary conservation status are provided for the new species.

KEYWORDS:  flora, Gentianaceae, Laos, Phou Khao Khouay NPA, taxonomy

Gentiana laotica Soulad., Tagane & Yahara, sp. nov.

Gentiana laotica is similar to G. bokorensis Hul of Cambodia and G. arenicola Kerr of northeastern Thailand in having single erect stem, number of stem leaves increasing toward stem apex and 5-merous flowers, but differs from the formers in having obovateto obovate-oblong leaves (vs narrowly ovate-triangularin G. bokorensis), whitish corolla (blue-purplish) and 5 equal sepals (vs often unequal, 2 small and 3 large) and from the latter in having smaller calyx lobes (4–5 mm long in G. laotica vs 5–7 mm long in G. arenicola), white flowers (vs pale blue), longer corolla lobes (ca 3 mm long vs 1.5 mm long) and smaller anthers (1.2 mm long vs 2 mm long).

Vernacular.— Wheed Khao (ຫວິດຂາວ) (suggested here).

Etymology.— The specific epithet refers to the country where we collected the plant.

Figure 1. Gentiana laotica Soulad., Tagane & Yahara:
A. habit; B. whole plant; C. abaxial leaf surface; D. base of leaf blade showing ciliolate margin; E. flower, top view; F. flowers (flower with leaves and calyx, flower with calyx, corolla); G. young flower corolla opened; H. stamens and pistil; I. ovary, style and stigma.

Scale bars: B = 5 cm, D = 1 mm, F = 1 cm, H & I = 5 mm.

Phetlasy Souladeth, Shuichiro Tagane, Akiyo Naiki, Hidetoshi Nagamasu and Tetsukazu Yahara. 2018. Gentiana laotica, A New Species of Gentianaceae from Laos.  Thai Forest Bulletin. 46(1); 72-75. DOI   10.20531/tfb.2018.46.1.11

ດອກຫວິດຂາວ, ພືດຊະນິດທີ່ພົບຢູ່ພູເຂົາຄວາຍ, 

ໂດຍ: ອຈ. ເພັດລາສີ (ຈາກຄະນະວິທະຍາສາດປ່າໄມ້)

 twitter.com/LaoBiodiversity/status/1006439540779675648

[Botany • 2018] Erythrina calcicola (Fabaceae) • A New Species from Phu Khiao-Nam Nao Forest Complex, northeastern Thailand

Erythrina calcicola Tetsana & Poopath 

ทองหลางหินปูน  
DOI  10.20531/tfb.2018.46.1.09 

ABSTRACT 

In the context of an ongoing survey of the limestone ecosystem in Phu Khiao-Nam Nao Forest Complex in Thailand, we describe and illustrate a new species, Erythrina calcicola Tetsana & Poopath. Morphologically, it is particularly similar to E. stricta Roxb. which is distributed in mainland Southeast Asia, but differs in the shape and size of the leaflets, size of the flowers and fruits, and shape of the calyx and the standard blade. Currently, E. calcicola is only known from Tham Pha Sawan temple, Loei province, northeastern Thailand.

 KEYWORDS: Phaseoleae, Erythrina, limestone, northeastern Thailand, conservation status

Figure 2. Erythrina calcicola Tetsana & Poopath in its natural habitat at Tham Pha Sawan temple, northeastern Thailand.
A. habitat; B. bark; C. thorny branches; D. leaf arrangement; E–G. inflorescences and flowers in various views; H. pods; I. immature seed.

Photos by N. Tetsana, 23 March 2017. 

Erythrina calcicola Tetsana & Poopath, sp. nov.

Similar to E. stricta Roxb., but distinguished by the shape of the leaflets, flowers and fruits; leaflets tri-lobed, rarely unlobed (unlobed in E. stricta), calyx cup-shaped or campanulate (spathaceous in E. stricta), standard ovate (elliptic-lanceolate in E. stricta) and fruits cylindric-oblong and constricted between the seeds (strap-like and not constricted between the seeds in E. stricta).
Type: Thailand, Loei, Pha Khao district, Tham Pha Sawan temple, 500 m, 23 Mar. 2017, Tetsana, Hemrat, Suwannachart & Kiewbang 1274 (holotype: BKF!; isotypes BKF!, SING!). Figs. 1–2.

Figure 1. Erythrina calcicola Tetsana & Poopath: A. habit; B. inflorescence; C. flower; D. calyx and dissected calyx; E. standard; F. wings; G. keels; H. diadelphous stamens; I. pistil; J. pod. All from Tetsana et al. 1274. Drawn by O. Kerdkaew.

....

Etymology.— The specific epithet, calcicola (limestone), refers to the habitat.
Vernacular.— Thong lang hin pun (ทองหลางหินปูน).

Naiyana Tetsana and Manop Poopath. 2018. Erythrina calcicola sp. nov. (Fabaceae) from Thailand. THAI FOREST BULL., BOT. 46(1): 62–66. DOI  10.20531/tfb.2018.46.1.09

[Botany • 2018] Diospyros phengklaii (Ebenaceae) • A New Species from south-west Thailand

Diospyros phengklaii  Duangjai, Sinbumroong & Suddee

in Duangjai, Sinbumroong & Suddee. 2018.

 DOI: 10.20531/tfb.2018.46.1.05

ABSTRACT

Diospyros phengklaii Duangjai, Sinbumroong & Suddee is described and illustrated. It is a species of tree only known from Bang Saphan District, Prachuap Khiri Khan Province, upper Peninsular Thailand. Phylogenetic evidence indicates that D. phengklaii is a distinct taxon and is a member of the Diospyros clade XI sensu Duangjai et al. (2009).

KEYWORDS:  Diospyros, morphology, new species, phylogenetics, Prachuap Khiri Khan, taxonomy

Figure 2. Diospyros phengklaii Duangjai, Sinbumroong & Suddee.
A. fruiting branchlet; B. stem & bark; C. leaves; D. flower bud of female flower; E–F. fruits. 

Photographs were taken by the second author on 10 October 2012 (B–F) and 25 March 2013 (A).

Diospyros phengklaii Duangjai, Sinbumroong & Suddee, sp. nov.

 Diospyros phengklaii resembles D. filipendula in the leaves with dense brown hairs, 4–5-merous flower with a salver-shaped corolla tube, and with long pedicel. It differs from that species by the bigger fruit, fruit narrowly cylindrical instead of ellipsoid, ovary (8–)10-locular rather than 4-locular.

....

Type: Thailand, Prachuap Khiri Khan, Bang Saphan, Thong Mongkhon, 25 Mar. 2013, Sinbumroong 56-2 (holotype BKF [213821], isotypes BK, BKF [213822, 213823, 213824], K). 

Vernacular.— Maphlap phengklai (มะพลับเพ็งคล้าย). 

Distribution.— Endemic to south-western Thailand, only known from Bang Saphan District, Prachuap Khiri Khan Province; may also be found in Myanmar. 

Ecology.— Tropical evergreen forest along stream; ca 200 m alt. 

Conservation status.— Endangered ENB1ab(iii) (IUCN, 2012). This species is currently known only from one locality with only 13 individuals found. The locality found is close to a village which is subject to human disturbance. 

Phenology.— Flowering and fruiting all year round. 

Etymology.— Named in honour of Dr Chamlong Phengklai, a senior botanist at the Forest Herbarium (BKF).

Sutee Duangjai, Aroon Sinbumroong and Somran Suddee. 2018. Diospyros phengklaii (Ebenaceae), A New Species from south-west Thailand. Thai Forest Bulletin (Botany). 46(1); 34-39.  DOI: 10.20531/tfb.2018.46.1.05

[Botany • 2018] Sophora huamotensis • A New Species of Sophora (Fabaceae-Papilionoideae-Sophoreae) from Thailand

Sophora huamotensis  Mattapha, Suddee & Rueangr.

in Mattapha, Suddee & Rueangruea, 2018

พิษนาศน์ดอยหัวหมด  ||  DOI: 10.20531/tfb.2018.46.1.02

ABSTRACT

Sophora huamotensis Mattapha, Suddee & Rueangr. is illustrated and described here. This new species is recognised by having numerous leaflets, articulated pedicels and the wing petals with lunate sculpturing on the outer surface and without auricles at the base. The morphological characters of the species are compared and discussed with its closest species. Description, illustration, images and a distribution map of the new species are provided.

KEYWORDS:  Doi Hua Mot, endemic, Leguminosae, Tak, Umphang district

Figure 2.  Sophora huamotensis Mattapha, Suddee & Rueangr. A. Inflorescences; B. Habit; C. Pods.

Photos by S. Chanhormhual (A) and S. Mattapha (B & C).

Sophora huamotensis Mattapha, Suddee & Rueangr., sp. nov. 

The species is closely similar to S. rubriflora Tsoong from which it differs markedly in the shape of leaflets (oblong-elliptic to ovoid-obovate in S. huamotensis vs oblong-oval in S. rubriflora), more numerous leaflets (23–39 in S. huamotensis vs 19–21 in S. rubriflora) and wing petals not auriculate (with distinctly 2-sided auriculate in S. rubriflora).

....

Ecology.— Dry deciduous dipterocarp forest on degraded limestone mountains, dominated by Shorea obtusa Wall. ex Blume, S. siamensis Miq., Quercus helferiana DC., Buxus sirindhorniana W.K.Soh, von Sternb., Hodk. & J.Parn. and Phoenix loureiroi Kunth; 760–780 m elevation.

Etymology.— The specific epithet refers to the name of the mountain “Doi Hua Mot”. 

Vernacular name.— Phit sanat doi hua mot (พิษนาศน์ดอยหัวหมด), the name is given by the authors.

Sawai Mattapha, Somran Suddee and Sukid Rueangruea. 2018. Sophora huamotensis, A New Species of Sophora (Fabaceae-Papilionoideae-Sophoreae) from Thailand. THAI FOREST BULL., BOT. 46(1): 4–9. DOI: 10.20531/tfb.2018.46.1.02

[Botany • 2017] A Revision of Middletonia (Gesneriaceae) in Thailand

Middletonia gebosa C.Puglisi: A. Habit, showing young fruit; B. Flowers; M. reticulata (Barnett) C.Puglisi: D. Habit; E. Flowers.

Photographs by Preecha Karaket (A, C–E) and David Middleton (B). 

Puglisi & Middleton. 2017. DOI: 10.20531/tfb.2017.45.1.07

ABSTRACT 

The genus Middletonia in Thailand is revised. We recognise four species, including the newly described Middletonia glebosa C.Puglisi and the resurrected M. reticulata (Barnett) C.Puglisi. A key to the species, full descriptions and proposed conservation assessments are provided. 

KEYWORDS: taxonomy, new species, Flora of Thailand

Figure 1. Middletonia gebosa C.Puglisi: A. Habit, showing young fruit; B. Flowers; M. reticulata (Barnett) C.Puglisi: D. Habit; E. Flowers.

Photographs by Preecha Karaket (A, C–E) and David Middleton (B).

MIDDLETONIA C.Puglisi, 

Taxon. 65: 286. 2016. 

Type species: Middletonia multiflora (R.Br.) C.Puglisi.

Five species, found in India, Bangladesh, Bhutan, Myanmar, China, Thailand, Laos, Cambodia, Vietnam and Malaysia. Four in Thailand.

1. Middletonia evrardii (Pellegr.) C.Puglisi, Taxon. 65: 286. 2016

Distribution.— Lao PDR, Vietnam.

Thailand.— EASTERN: Nakhon Ratchasima, CENTRAL: Nakhon Nayok

 Ecology.— Evergreen forest.

Note.— The material from Thailand differs slightly from the Vietnamese material, especially in the leaf shape which is more elongated and with an acute apex in the Thai specimens. As there are rather few specimens from throughout the distribution range, with no floral material from Thailand available for dissection, further collections are necessary to assess whether the Thai and Vietnamese plants belong to one or more species.

2. Middletonia glebosa C.Puglisi, sp. nov. 

Similar to Middletonia regularis in having the inflorescences shorter than the leaves and to Middletonia reticulata in the shortly caulescent habit. Differs from both in having a dense indumentum on the adaxial side of the leaf, with glands and eglandular hispid hairs (upperleafsurface glabrescent or minutely glandular in Middletonia regularis, glabrescent in M. reticulata), and in the short, non-twisted, lumpy and irregular fruit (longer, weakly to strongly twisted, smooth and regular in M. regularis and M. reticulata). 

Type: Thailand, Sukhothai, Ram Kham Haeng National Park, Khao Luang, alt. 520 m, 11 Oct. 2012, fr., Middleton, Karaket, Suddee & Triboun 5559 (holotype E [E00547434]; isotypes BK, BKF [SN201922]).  

Distribution.— Cambodia.

Thailand.— NORTHERN: Sukhothai. 

 Ecology.— Mixed deciduous forest with bamboo on granite bedrock.

Etymology.— The specific epithet is the Latin adjective glebosus, -a, -um, which means “lumpy” and refers to the peculiar surface of the capsule.

Notes.— In Ram Kham Haeng National Park this species grows in a mixed population with Middletonia reticulata. The two are readily told apart in the field by Middletonia glebosa having softer, paler leaves, a shorter inflorescence, generally slightly smaller flowers, and the curious short, straight, lumpy fruit. The species is known only from Ram Kham Haeng National Park and a single collection made around 150 years ago in Cambodia. The Cambodian collection, placed in Paraboea regularis by Xu et al. (2008), is only in fruit so the identification will need to be verified with flowering material. However, the fruit of this species is rather distinctive.

3. Middletonia regularis (Ridl.) C.Puglisi, Taxon. 65: 287. 2016.

Distribution.— Malaysia. 

Thailand.— PENINSULA: Surat Thani, Phangnga; SOUTH-WESTERN: Kanchanaburi.

Ecology.— Lowland evergreen forest on limestone soils. 

Note.— The protologue of Paraboea monticola suggests the flowers to be much larger: “lobes … 6–9 × c. 6.5 mm”. However, none of the material available for this study had lobes longer than 3.3 mm. 

4. Middletonia reticulata (Barnett) C.Puglisi, comb. nov.

— Boea reticulata Barnett, Nat. Hist. Bull. Siam Soc. 20: 20. 1961.

Type: Thailand, Chiang Mai, Mae Wang

Ecology.— Mixed deciduous forest on granite bedrock. 

Distribution.— Currently endemic to Thailand but possibly also occurring in Lao PDR and Myanmar.

Thailand.— NORTHERN: Mae Hong Son; Chiang Mai; Lamphun; Lampang; Phrae; Sukhothai. 

 Note.— This species is resurrected from synonymy of Middletonia multiflora (R.Br.) C.Puglisi from which it differs in the distinctively reticulate venation pattern covered in loose brown indumentum on the lower surface of the leaves, and in the auriculate leaf base. Middletonia multiflora has a denser indumentum on the leaf and the tertiary venation is less densely reticulate and less visible altogether. Middletonia multiflora is widespread along the northern distribution of the genus (from India to Vietnam), but none of the material from Thailand studied can be attributed to M. multiflora.

Carmen Puglisi and David J. Middleton. 2017. A Revision of Middletonia (Gesneriaceae) in Thailand. THAI FOREST BULL., BOT. 45(1); 35–41. DOI: 10.20531/tfb.2017.45.1.07

[Botany • 2017] Hopea macrocarpa • A New Species (Dipterocarpaceae) from Peninsular Thailand

Hopea macrocarpa Poopath & Sookch. 

in Poopath, Sookchaloem, Duangjai & Pooma. 2017

ชันหอม  || DOI: 10.20531/tfb.2017.45.2.02 

ABSTRACT

A new species of the important timber tree family Dipterocarpaceae, Hopea macrocarpa Poopath & Sookch., from Hala-Bala forest, Narathiwat, Thailand is described and illustrated. Hopea macrocarpa is morphologically similar to H. mengarawan Miq. from Peninsular Malaysia, Sumatra and Borneo in its leaf shape, leaf size, leaf blade texture and number of secondary nerves. The new species differs from H. mengarawan, however, by having bigger flower buds, bigger fruits and longer fruit stalks.

KEYWORDS: Conservation assessment, Hala-Bala forest complex, Hopea, taxonomy.

Figure 2.  Hopea macrocarpa Poopath & Sookch.:
 A. stilt roots & bark; B. resin; C. inner bark; D. inflorescences; E. flowers; F. fruit.

Photographed by Manop Poopath.

 Hopea macrocarpa Poopath & Sookch., sp. nov. 

— Hopea sp., Poopath, Sookchaloem & Santisuk, Thai Forest Bull., Bot. 40: 80, 2012.

— Hopea sp. 1, Pooma, Poopath & M.F.Newman, Flora of Thailand Vol. 13(4): 617. 2017.

Thailand.— PENINSULAR: Narathiwat

[Sukhirin, Ban Phu Khao Thong, alt. 250 m, 15 May 2005, Poopath B105 (BKF); ibid, alt. 250 m, 11 July 2005, Poopath B118 (BKF); Waeng, Hala-Bala Wildlife Sanctuary, alt. 220 m, 8 June 2004, ....].

Distribution.— Endemic to Thailand, known only from Narathiwat Province. 

Ecology.— Tropical rain forest, foot hills to ridges, 50–300 m alt., rather rare, associated with lowland Dipterocarps species, i.e. Dipterocarpus grandiflorus (Blanco) Blanco, Shorea parvifolia Dyer, S. singkawang (Miq.) Miq., Hopea pedicellata (Brandis) Symington, H. latifolia Symington, H. bracteata Burck and Vatica bella Slooten. 

Vernacular.— Chan hom (ชันหอม). 

Etymology.— The specific epithet ‘macrocarpa’ refers to the large fruit.

Manop Poopath, Duangchai Sookchaloem, Sutee Duangjai, Rachun Pooma. 2017. Hopea macrocarpa (Dipterocarpaceae), A New Species from Peninsular Thailand. THAI FOREST BULL., BOT. 45(2); 94-98. DOI: 10.20531/tfb.2017.45.2.02

   

[Botany • 2017] Asplenium minutifolium (Aspleniaceae) • A New Species from Thailand

Asplenium minutifolium Kanem. & Tagane

 DOI: 10.20531/tfb.2017.45.1.06 

ABSTRACT 

A new species of Asplenium (Aspleniaceae), Asplenium minutifolium Kanem. & Tagane, from Phu Kradueng National Park, Loei Province, Northeast Thailand and Khao Yai National Park, Nakhon Nayok Province, Central Thailand, is described and illustrated. This species can be distinguished from all similar species in East and South-East Asia by its simple and small lamina (1–5 × 0.3–0.7 cm), small and entire pinnae (1–4 × 0.8–2.5 mm), reflexed pinna arrangement (>90° from the midrib) in the lower 2/3 of the lamina and a sori arrangement that is almost always arranged in a single row on the basiscopic vein. 

KEYWORDS: Asplenium, Aspleniaceae, Pteridophyte, Fern, new species, Phu Kradueng National Park, Khao Yai National Park, Thailand.

Figure 2. Asplenium minutifolium  Kanem. & Tagane, sp. nov.
 A. habit; B. portion of lamina (undersurface) showing sori; C. rhizome with scales; D. habitat.

Asplenium minutifolium Kanem. & Tagane, sp. nov. 

Similar to Asplenium kiangsuense Ching & Y.X.Jing of southern China in size and shape of lamina, but differs in having a narrower lamina (ca 0.7 cm wide in A. minutifolium vs. ca 1 cm wide in A. kiangsuense), wingless rachis (vs. 2 slightly raised lateral wings), smaller pinnae (1–4 × 0.8–2.5 mm vs. 4–5 × 4–5 mm), generally fewer sori per pinna (1– 3(–4) vs. 3–5), and in the sori arrangement (usually arranged in a row vs. arranged oppositely). Also similar to Asplenium siamense Tagawa & K.Iwats. of North-East Thailand, but can be distinguished by its simple pinnae at the tip of lamina (vs. lamina forked several times at the tip), thicker pinnae (thickly papery vs. thinly papery), reflexed pinna arrangement in lower part (vs. divaricate around lamina), and pinnae with entire or slightly undulate margins (vs. shallowly lobed (lobes to ca 1mm long)). 

–– Type: Thailand. Loei Province, Phu Kradueng National Park, Lom Sak Cliff, alt. 1292 m, 12 June 2015, Kanemitsu et al. T4736 (holotype BKF!, isotype TNS!).  

Distribution.–– Currently Asplenium minutifolium is known only from Phu Kradueng National Park and Khao Yai National Park. 

Ecology.–– In Phu Kradueng National Park, Asplenium minutifolium occurs in a semi-shaded and damp rock crevice that is ca 50 cm wide and 10 cm deep, on the plateau at an altitude of ca 1300 m. Associated fern and lycophyte species include Aglaomorpha rigidula (Sw.) Hovenkamp & S.Linds., Goniophlebium subauriculatum (Blume) C.Presl, Oleandra undulata (Willd.) Ching, Pyrrosia lingua (Thunb.) Farw. var. heteractis (Mett. ex Kuhn) Hovenkamp, and Selaginella siamensis Hieron. Other than the elevation, nothing is known about the ecology of this species at Khao Yai National Park. 

Etymology.–– The species epithet “minutifolium” refers to the very small lamina and pinnae of this species.

 Hironobu Kanemitsu, Shuichiro Tagane, Somran Suddee, Sukid Ruangruaea, Tetsukazu Yahara. 2017. Asplenium minutifolium (Aspleniaceae), A New Species from Thailand. THAI FOREST BULL., BOT.  45(1); 29–34.  DOI: 10.20531/tfb.2017.45.1.06

[Botany • 2017] Hibiscus contortus | ชบาหุบ • A New Species of Hibiscus (Malvaceae-Malvoideae) from Thailand

ชบาหุบ |  Hibiscus contortus  Phuph. & S.Gardner

DOI: 10.20531/tfb.2017.45.1.02

ABSTRACT

A new species, Hibiscus contortus Phuph. & S.Gardner, is described and contrasted to its nearest ally, H. floccosus Mast.

KEYWORDS: Malvaceae-Malvoideae; Hibiscus; new species; conservation; Thailand

INTRODUCTION 

Hibiscus L. comprises approximately 200 species distributed almost worldwide, mostly in the tropics and subtropics, with a few species in temperate regions (Bayer & Kubitzki, 2003). The Thai species of Hibiscus were enumerated by Phuphathanaphong et al. (1989), totalling 17 species (7 exotic species), and recently 19 species (9 exotic species) were recognized by Pooma & Suddee (2014). Further study of Malvaceae-Malvoideae for the Flora of Thailand by the first author found interesting fertile material of Hibiscus from Surat Thani and Songkhla provinces, southern Thailand, which we describe here as Hibiscus contortus Phuph. & S.Gardner. Borssum Waalkes (1966) recognized 9 sections of tribe Hibisceae and this new species belongs to section Azanza. Most species in this section are trees with broad stipules and palminerved leaves. Hibiscus contortus is most similar to Hibiscus floccosus Mast. which occurs in Peninsular Malaysia

....

Hibiscus contortus Phuph. & S.Gardner, sp. nov. 

Allied to Hibiscus floccosus Mast. but differs in leaves not lobed, not scabrous (vs angular or lobed, scabrous); pedicel 2–2.5 cm long, jointed (vs 0.5–1 cm long, without joint); petals pale pink to pale orange with darker pink base (vs yellow to orange with red veins from base); stamen filaments 5–7 mm long (vs 2–2.5 mm long). 

Type: Thailand, Surat Thani, Don Sak, alt. 5 m, 19 Dec. 2006, Pooma et al. 6460 (holotype BKF; isotypes A, BKF, E, L). Figs. 1–2. 

Etymology.— The specific epithet ‘contortus’ is derived from Latin, in reference to the overlapped and twisted petals.

Vernacular.— Chaba hup (ชบาหุบ). 

Leena Phuphathanaphong and Simon Gardner. 2017. A New Species of Hibiscus (Malvaceae-Malvoideae) from Thailand. THAI FOREST BULL., BOT. 45(1); 6–9.  DOI: 10.20531/tfb.2017.45.1.02

[Botany • 2016] Nepenthes krabiensis • A New Species of Nepenthes (Nepenthaceae) from Thailand

 Nepenthes krabiensis 

  Nuanlaong, Onsanit, Chusangrach & Suraninpong 

DOI:  10.20531/tfb.2016.44.2.08

ABSTRACT

This paper describes and illustrates a new species of Nepenthaceae, Nepenthes krabiensis. The new species is closely related to N. rosea which has been found in the same habitat of the wildlife sanctuary of Krabi Province in Southern Thailand.

KEYWORDS: Thailand, Krabi, Peninsular Thailand, taxonomy.

Figure 3. Nepenthes krabiensis. A. habitat and habit, C. lower pitcher; D. upper pitcher. 

 Distribution.― Southern Thailand, founded only at Khao Pra-Bang Khram Wildlife Sanctuary, Krabi Province, Thailand. 

Ecology.― On summit areas, in sandy or mool soil, often growing in limestone rock crevices, at 600–700 m above sea level. 

Etymology.― The species is named after Krabi Province, to which it is endemic. 

Phenology.― Flowering June to August. 

Proposed IUCN conservation outlook assessment (2012).― Nepenthes krabiensis is assessed as Critically Endangered [CR B2ab (ii)]. It distributed in an area of 500 m2 and only on a single site on the summit of Mt Nor Ju Jee. 

Notes.― Nepenthes krabiensis is similar to N. rosea which grows in the same province and also on limestone mountains. The species share lanceolate, pseudo-petiolate and decurrent leaves, but N. krabiensis differs from N. rosea in the conspicuous coloration of the lower pitchers: being orange with red stripes, with red blotches over the inner surface and absent in the glandular zone, the green to orange or red peristome, the green to red lid upper surface, and the green to yellow or orange lid lower surface. The lower pitchers of N. rosea are green to light pink with dark pink stripes outside, and uniformly green to dark pink over the inner surface.

 Sanya Nuanlaong, Sarayut Onsanit, Vutthipong Chusangrach, Potjamarn Suraninpong. 2016. A New Species of Nepenthes (Nepenthaceae) from Thailand. THAI FOREST BULL., BOT.  44(2); : 128–133. DOI:  10.20531/tfb.2016.44.2.08

[Botany • 2016] Coelogyne ventrinigra | เอื้องนางพญาลิ้นดำ • A New Species (Orchidaceae) from Thailand

Coelogyne ventrinigra 

 de Vogel, Suksathan & Boonnuang 

เอื้องนางพญาลิ้นดำ |  ThaiForestBulletin

Figure 2. Coelogyne ventrinigra de Vogel, Suksathan & Boonnuang,
A. flowering plant in habitat; B. inflorescence; C. flower with brownish-black spots on labellum.

 Photos by H. Boonnuang.  |  ThaiForestBulletin 

ABSTRACT

Coelogyne ventrinigra, a new species from Umphang District, Tak Province, in the western part of Thailand, is described and illustrated.

KEYWORDS: Elatae; Conservation status

Etymology.— The epithet ventrinigra means ‘black belly’, from the Latin venter (belly), and nigra (black), referring to the blackish spots abaxially on the lip.

Vernacular.— Ueang nang phaya lin dam (เอื้องนางพญาลิ้นดำ).

  

กล้วยไม้ชนิดใหม่ของโลก ที่เพิ่งได้รับการตีพิมพ์เมื่อไม่กี่วันมานี้เอง หนึ่งในความภาคภูมิใจของประเทศไทย และหนึ่งในความภูมิใจของผมที่ได้เป็นหนึ่งในผู้ร่วมศึกษากล้วยไม้ชนิดนี้จนได้รับการตีพิมพ์เป็นชนิดใหม่ของโลก หลังจากใช้เวลาหลายปีในการจัดทำคำบรรยายและเรื่องราวต่าง ๆ มาวันนี้ผมเหมือนจะรู้สึกว่ากล้วยไม้ชนิดนี้เหมาะแก่การถวายต่อพระบาทสมเด็จพระเจ้าอยู่หัว รัชกาลที่ ๙ เหลือเกิน ไม่ใช่เพียงเพราะตีพิมพ์ในช่วงเวลาเดียวกัน ทว่าหลายอย่างเป็นความเหมาะเจาะอย่างยิ่ง

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เราเจอกล้วยไม้ชนิดนี้ในช่วงเวลาที่สมเด็จพระเจ้าพี่นางเธอ เจ้าฟ้ากัลยาณิวัฒนา กรมหลวง นราธิวาสราชนครินทร์ สิ้นพระชนม์ ทว่ากว่าจะมาตีพิมพ์ได้สำเร็จก็เมื่อเวลาที่คนไทยทั้งประเทศร่ำให้น้ำตาเป็นสายเลือด ในช่วงที่พระบาทสมเด็จพระเจ้าอยู่หัว รัชกาลที่ ๙ สวรรคต นับเป็นกล้วยไม้ที่มีสีในช่วงเวลาแห่งความชอกช้ำเหลือเกิน เพราะทั้งดอกมีเพียงสีขาวและดำเท่านั้นเอง

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ผมภูมิใจกับการค้นพบกล้วยไม้ไทยเสมอ ๆ ทว่าความภูมิใจใด ๆ หากแลกกับปาฎิหารย์แห่งชีวิตของพระองค์ท่านไว้ได้ผมจะแลกทั้งหมดครับ แต่ตอนนี้คงไม่ทันแล้วได้แต่ถวายความงดงามแห่งธรรมชาติชนิดนี้ไว้ว่าเป็นสิ่งที่คนไทยทั้งหมดได้ถวายงานรับใช้ใต้เบื้องพระยุคคลบาท...

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ขอบคุณทุกท่านที่ช่วยเหลือจนกล้วยไม้ชนิดนี้ได้รับการตีพิมพ์ครับ หลวงพี่กมล เจ๊แมว แสงเดือน ถนอมวงศ์ธนา น้าเสก เสกสรร โตวิวัฒน์ ที่ร่วมทางกันจนได้ตัวอย่างในธรรมชาติ แม้จะต้องใช้เวลา ใช้พลังอย่างมากก็ตาม ขอบคุณไว้ ณ.ที่นี้ด้วยครับ

ขอบคุณนักพฤกษศาสตร์ ดร.ปิยเกษตร สุขสถาน และ ดร.สันติ วัฒฐานะ ครับที่จัดทำคำบรรยายและศึกษาเพิ่มเติม

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ขอบคุณครอบครัวของผมที่ยอมทุกอย่างในการเดินทางออกไปใช้ชีวิต...

   

photos: Hassachai Boonuang  — facebook.com/Hasachai/posts/1209422609080508

นี่เป็นภาพที่ผมถ่ายตอนที่พบเป็นครั้งแรกเมื่อ 8 ปีที่แล่ว Hassachai Boonuang  — Mastercanvas Kitiwattana

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 Ed de Vogle, Piyakaset Suksathan, Thitiporn Pingyot, Hassachai Boonuang and Santi Watthana. 2016. Coelogyne ventrinigra (Orchidaceae), A New Species from Thailand.
 Thai For. Bull. 44(1); 49-52.  https://www.tci-thaijo.org/index.php/ThaiForestBulletin/issue/view/633