[Botany • 2024] Microchirita argostemmiflora, M. flavofusca, M. magniflora • Three New Species from Khammouane Karst [Studies on the Gesneriaceae in Laos I]

ດອກລະຄັງຫວງ  ||  Microchirita magniflora Souvann. 

in Souvannakhoummane et Lanorsavanh, 2024. 

  li01.tci-thaijo.org/index.php/TNH

 facebook.com/BioFNS

Photos by K. Souvannakhoummane.

Abstract

 Three new species of Microchirita from the Khammouane Karst are here described as part of studies on the family Gesneriaceae in Laos. The description, habitat, phenology, vernacular name, initial IUCN assessment, illustration, and photographs of the new taxa are provided.

Keywords: Hin Nam No National Park, limestone flora, new taxa, taxonomy

Microchirita argostemmiflora Souvann. & Lanors.:
A. habit; B. flower, front view; C. flower, back view; D. anthers.

    All from LP140. Photos by K. Souvannakhoummane & S. Lanorsavanh.

Microchirita argostemmiflora Souvann. & Lanors., sp. nov. 

Similar to Microchirita personata C.Puglisi in the habit, but differing in the inflorescence 2–6-flowered (vs more than 10-flowered), corolla lobes rotate (vs personate), anthers yellow, papillose (vs white, glabrous).

Etymology.— The specific epithet refers to the flowers resembling the flower of Argostemma (Rubiaceae).

Vernacular name.— ດອກປີ່ນຂາວ [Dok Pin Khao].

Microchirita flavofusca Souvann. & Lanors.:
A. habitt; B. flower, front view, and slightly back view; C. inflorescence withflowers and young fruits; D-E. dissected corolla tube showing anthers and staminodes; F. calyx and pistil; G. young fruit.

  All from LP139. Photos by S. Lanorsavanh.

Microchirita flavofusca Souvann. & Lanors. sp. nov.

Similar to Microchirita glandulosa C.Puglisi in having bracts fused at the base, but differeng in the stem glabrous (vs stem sparsely glandular hairy), calyx tube 2.5–4 mm, hairy only outside (vs 1.5 mm, hairy on both sides), corolla 3–3.5 cm long, light yellow with brown-red patch (vs 15–18 mm, white), filaments minutely glandular (vs glabrous). It is also similar to M.magnifloraSouvann., but differing by calyx sparsely eglandular pubescent, remote serrate with glandular margin (vs densely glandular pubescent, with some stellate hairs, and entire margin), corollalightly yellow with brown-red patch inside (vs corolla dark purple, granite grey patch near mouth with yellow inside).

Etymology.—The  specific epithet refers to the yellow flower with brown-red patch.

 Vernacular  name.— ດອກລະຄັງເຫຼືອງ [Dok  La  Khang Leung].

Microchirita magniflora Souvann.:
A. habit; B. flowers; C. flower, side view; D. calyx and pistil; E. dissected corolla tube showing anthers and staminodes; F. anthers.

 All from PMHNN0209. Photos by K. Souvannakhoummane.

Microchirita magniflora Souvann., sp. nov.

Similar to Microchirita involucrata (Craib) Yin Z.Wang in the habit and morphology of flower form, but differing in bracts fuse at the base (vs free), calyx covered by glandular hairs with some stellate hairs outside (vs only glandular hairs), corolla 35–40 mm long, yellow inside throat (vs 18–21 mm long, not yellow inside), filaments minutely glandular (vs glabrous).

Etymology.— The specific epithet refers to large flowers.

Vernacular name.— ດອກລະຄັງຫວງ [Dok  La  Khang Louang].

 

Keooudone Souvannakhoummane and Soulivanh Lanorsavanh. 2024. Studies on the Gesneriaceae in Laos I: Three New Species of Microchirita from Khammouane Karst. Tropical Natural History. 24(1); 2024), 60–69. li01.tci-thaijo.org/index.php/TNH/article/view/259309

 facebook.com/BioFNS/posts/949899640268153

 

[Botany • 2021] Didymocarpus laoticus, D. trilobus, Paraboea planiflora, et al. • Six New Species and Eight New Records of Gesneriaceae from Laos

Didymocarpus trilobus Souvann. & Phonep.,   D. laoticus Souvann. & Lanors., 
 D. angustiflorus Souvann. & Lanors.,   D. bolavenensis Souvann., Soulad. & Phonep., 

in Souvannakhoummane, Lanorsavanh, Tagane, ... et Lamxay, 2021. 

Gardens’ Bulletin Singapore. 73(2); 

 facebook.com/BioFNS 

 facebook.com/SoulivanhLanorsavanh

ABSTRACT

Six new species of Gesneriaceae from Laos, namely Didymocarpus angustiflorus Souvann. & Lanors., D. bolavenensis Souvann., Soulad. & Phonep., D. laoticus Souvann. & Lanors., D. trilobus Souvann. & Phonep., Hemiboea olivifolia Souvann. & Tagane and Paraboea planiflora Souvann. & Lanors., are described and illustrated. Additionally, Aeschynanthus bracteatus Wall. ex A.DC., A. micranthus C.B.Clarke, Epithema ceylanicum Gardner, Lysionotus serratus D.Don, Microchirita luteola C.Puglisi, Paraboea swinhoei (Hance) B.L.Burtt, Petrocosmea kerrii Craib and Pseudochirita guangxiensis (S.Z.Huang) W.T.Wang, are newly recorded for the flora of Laos.

Keywords. Didymocarpus, flora of Laos, Hemiboea, new distribution, new taxon, Paraboea, taxonomy

Didymocarpus angustiflorus Souvann. & Lanors., sp. nov. 

Morphologically similar to Didymocarpus payapensis Nangngam & J.F.Maxwell from Thailand, in habit, elliptic lamina, and glabrous and salverform corolla, but differs in having lamina abaxially puberulent (vs glabrous), calyx 5-parted to base, green, with glands outside (vs calyx lobes divided c. 2/3 to the base, maroon, sparsely covered with multicellular glandular hairs and scattered pigment glands), corolla 1.5– 2.2 cm long, dark blue with white patch in mouth (vs c. 2.5 cm long, dark purple), filaments sparsely multicellular glandular puberulent (vs glabrous), and style glabrous (vs sparsely covered with multicellular glandular hairs).

Distribution. Central Laos (known only from the type locality in Phou Khao Khouay National Protected Area). 

Habitat and phenology. Didymocarpus angustiflorus grows on moist rocks in evergreen forest, along with Globba sp., Monolophus sp. (Zingiberaceae), Sonerila sp. (Melastomataceae), Begonia hymenophylla Gagnep. (Begoniaceae) and some ferns. Flowering from July to August and fruiting from September to October (observed from cultivation). 

Etymology. The specific epithet refers to its narrow cylindrical corolla tube. 

Vernacular name. ດອກແກຫຼອດມ່ວງ (Dok Kea Loth Mouang).

Didymocarpus bolavenensis Souvann., Soulad. & Phonep., sp. nov. 

Morphologically similar to Didymocarpus inflatus J.F.Maxwell & Nangngam from Thailand, in habit, ovate lamina, campanulate glabrous calyx, and cylindric ovary, but differs in the salverform to narrowly funnelform corolla which is 3–3.5 cm long, lobes purple with white lines in the mouth (vs funnelform, 4 cm long, lobes violet with dark violet-reddish lines in mouth), and broadly reniform corolla lobes (vs lobes suborbicular).

Distribution. Southern Laos (so far known only from the Bolaven Plateau). 

Habitat and phenology. Didymocarpus bolavenensis grows on a wet and shaded table rock located near a stream in lower montane evergreen forest. The surface of the rock is covered with humus formed from mosses and ferns. Flowering from August to September and fruiting from September to November. 

Etymology. The specific epithet of this taxon refers to the type locality. 

Vernacular name. ດອກແກມ່ວງບໍລະເວນ (Dok Kea Mouang Bolaven). 

    

Didymocarpus laoticus Souvann. & Lanors., sp. nov. 

The new species is morphologically similar to Didymocarpus sinoindicus N.S.Prasanna, Lei Cai & V.Gowda in habit, ovate lamina and ovary shape, but differs in having calyx 10–13 mm long, white, glabrous (vs 4–6 mm long, cream-white to greenish yellow, covered with peltate pigment glands outside), corolla 30–32 mm long, white with dark blue in the mouth (vs corolla 8.5–12 cm long, cream-white to greenish yellow with purple striations in the mouth), and ovary glabrous (vs ovary covered with peltate pigment glands). 

Distribution. Central Laos (Phou Khao Khouay National Protected Area in Bolikhamxai Province). 

Habitat and phenology. It was found growing on wet rocks near a small stream in mixed deciduous forest where Dendrocalamus membranaceus Munro (Poaceae) is dominant. Flowering from late July to August. 

Etymology. The specific epithet refers to where the type material was collected. 

Vernacular name. ດອກແກຂາວໃຈຟ້າ (Dok Kea Khao Jai Fa).

Didymocarpus trilobus Souvann. & Phonep., sp. nov. 

The new species is morphologically similar to Didymocarpus albiflorus Souvann. & Phonep., in having corolla funnelform, but differs in often lacking larger basal leaves (vs with larger basal leaves in D. albiflorus), calyx campanulate and 3-lobed (vs funnelform and 5-lobed), corolla dark purple (vs white), and ovary glabrous (vs sparsely glandular puberulent).

Distribution. Central Laos (so far known from two small populations in Phou Khao Khouay National Protected Area, in Vientiane and Bolikhamxai). 

Habitat and phenology. It is common in seasonal deciduous forest mixed with bamboo at an altitude of 300 m and grows on wet rocks with mosses and Adiantum sp. (Adiantaceae). Flowering from July to August and fruiting from August to October. The above-ground part of the plants dries up completely in January (recorded from cultivated living collection). 

Etymology. The species epithet of this taxon refers to the three lobes of the calyx due to the upper lobes fusing into a single lobe.

Vernacular name. ດອກແກມ່ວງໃຫຍ່ (Dok Kea Mouang Yai).

Hemiboea olivifolia Souvann. & Tagane, sp. nov. 

Morphologically similar to Hemiboea cavaleriei H.Lév., but differs in having lamina succulent and dark waxy olive-green adaxially, and corolla white and glabrous outside (vs lamina herbaceous in H. cavaleriei var. cavaleriei, lamina papery to thinly papery in H. cavaleriei var. paucinervis W.T.Wang & Z.Y.Li and both varieties non-waxy olive-green on adaxial surface; corolla outside pale yellow and sparsely glandular puberulent).

Distribution. Northern Laos (Pha Nam Yard Forest Reserve Area, Louangphabang Province). 

Habitat and phenology. It grows on a limestone hill in deciduous forest, c. 300 m from the banks of the Mekong River, where the stable humidity, essential for the survival of this species, comes from the river. It occurs with Amorphophallus yunnanensis Engl. (Araceae), Impatiens parishii Hook.f. (Balsaminaceae), Dracaena sp. (Asparagaceae) and Asplenium sp. (Aspleniaceae). Flowering from October to November and fruiting in December. 

Etymology. The specific epithet of this taxon refers to the olive-green upper leaf surface. 

Vernacular name. ດອກລະຄັງເງິນ (La Khang Ngeurn).

Paraboea planiflora Souvann. & Lanors., sp. nov. 

Morphologically similar to Paraboea khaoyaica Kaitongsuk et al. in habit and in having an almost flat-faced corolla (Kaitongsuk et al., 2021), but differs in bracts broadly oblanceolate to oblong, calyx with a scattered glandular indumentum, and corolla minutely pubescent outside (vs bracts linear or lanceolate, calyx glabrous, and corolla glabrous in P. khaoyaica).

Distribution. Central Laos (Phou Khao Khouay National Protected Area, in Bolikhamxai and Saysomboun Province). 

Habitat and phenology. Paraboea planiflora grows on open to semi-shaded rocks in mixed deciduous forest with bamboo, and is often common near streams. Flowering from July to August and fruiting from August to September. 

Etymology. The specific epithet of this taxon refers to the flat-faced corolla. 

Vernacular name. ຊາລຶສີ (Sa Leu Si).

 

Keooudone Souvannakhoummane, Soulivanh Lanorsavanh, Shuichiro Tagane, Phetlasy Souladeth, Phongphayboun Phonepaseuth, Wittaya Pongamornkul and Vichith Lamxay. 2021. Six New Species and Eight New Records of Gesneriaceae from Laos. Gardens’ Bulletin Singapore. 73(2); 427 - 456. 

nparks.gov.sg/sbg/research/publications/gardens'-bulletin-singapore/-/media/sbg/gardens-bulletin/gbs_73_02_y2021/73_02_13_y2021_v7302_gbs_pg427.pdf 

 facebook.com/BioFNS/posts/7109361619077762

 facebook.com/SoulivanhLanorsavanh/posts/4511505385571536

    

[Botany • 2021] Cymbilabia sourioudongii (Orchidaceae) • A New Species from Lao PDR

Cymbilabia sourioudongii Souvann. & Lanors.,

in Souvannakhoummane, Lanorsavanh, et al., 2021. 

ເອື້ອງຊໍ່ມ່ວງ  ||  Rheedea.in  

photos a–c by S. Lanorsavanh; d–e by P. Rakthai

Researchgate.net/publication/355355529

Abstract

Cymbilabia sourioudongii, a new species of epiphytic orchid is described and illustrated from Phou Khao Khouay National Protected Area of Laos PDR. 

Keywords: Illegal orchid trade, New species, Phou Khao Khouay National Protected Area, Vandopsis.

Cymbilabia sourioudongii Souvann. & Lanors.
a. Plant in habitat; b. Flowering plant; c. Flower in habitat; d. Flower of plant growing in nursery; e. Flower–lateral view;
f. Flowers of Cymbilabia undulata (Lindl.) D.K.Liu & M. H.L.

Scale bars 2 cm. 

(a–c from S. Lanorsavanh & Souvannakhoummane SL1982; d–f from cultivated plants; 

photos a–c by S. Lanorsavanh; d–e by P. Rakthai; f by W. Buddhawong).

Cymbilabia sourioudongii Souvann. & Lanors., sp. nov. 

 Similar to C. undulata but differs in having a more compact habit, narrowly elliptic-oblong to lanceolate leaves that are 2–3.7 cm long and 0.8–1.7 cm wide (vs. oblong, 9–15 cm long and 1.5–3 cm wide), smaller sepals and petals that are 7–18 mm long and 3–8 mm wide (vs. 24–40 mm long and 8–14 mm wide), a shorter labellum that is 5–9 mm long, which has semi-orbiculate side lobes (vs. 15–20 mm long with sub-ovate to triangular side lobes), a verrucose epichile (vs. muricate with papillae).

Habitat: Growing on small trees and boulders in full sun in mixed semi-deciduous broad-leaved and coniferous forest at around 1100 m elevation. 

Distribution: Cymbilabia sourioudongii is so far known only from the type locality in Phou Khao Khouay National Protected Area in Bolikhamxai province, central Laos.

 Etymology: The name for this species honors His Excellency Dr. Sourioudong Sundara, Vice Minister of Education and Sport, Lao PDR, who is an experienced scientific researcher of Lao PDR.

Vernacular name: Ueang Sor Mouang ເອື້ອງຊໍ່ມ່ວງ (Purple flower orchid).  

Souvannakhoummane K., Lanorsavanh S., Rakthai P., Kumar P. and S.W. Gale. 2021. Cymbilabia sourioudongii (Orchidaceae), A New Species from Lao PDR. RHEEDEA: Journal of the Indian Association for Angiosperm Taxonomy. 31(3); 186–190. Rheedea.in/journal/eT2qVxA1

 facebook.com/335371220741671/photos/904803750465079

    

ທີມງານນັກຄົ້ນຄວ້າ ວິທະຍາສາດ ຈາກມະຫາວິທະຍາໄລແຫ່ງຊາດ ທີ່ໄດ້ຄົ້ນພົບ ດອກເຜີ້ງຊະນິດໃໝ່ຂອງໂລກ ຄົ້ນພົບຢູ່ເຂດປ່າສະຫງວນແຫ່ງຊາດ ພູເຂົາຄວາຍ ຢູ່ ສປປ ລາວ ໄດ້ໃຫ້ກຽດ ນໍາເອົາ ຊື່ຂອງທ່ານ ປອ. ສຸລິອຸດົງ ສຸນດາລາ (Dr. Sourioudong Sundara), ອາດີດ ອາຈານສອນ ແລະ ນັກຄົ້ນຄວ້າ  ທາງດ້ານ ວິທະຍາສາດ Biotechnology ຢູ່ມະຫາວິທະຍາໄລແຫ່ງຊາດ ຜູ້ນໍາພາທີມນັກສຶກສາ ຄົ້ນຄວ້າກ່ຽວກັບດອກເຜິ້ງປ່າ, ປະຈຸບັນ ເປັນ ຮອງລັດຖະມົນຕີກະຊວງສຶກສາທິການ ແລະ ກິລາ, ມາຕັ້ງເປັນຊື່ວິທະຍາສາດດອກເຜິ້ງຊະນິດໃໝ່ຂອງໂລກ ໃນຊື່ Cymbilabia sourioudongii Souvann. & Lanors.

 twitter.com/PhaKhaoL/status/1449927818830180355

Researchgate.net/publication/355355529_Cymbilabia_sourioudongii_a_new_species_from_Lao_PDR

[Botany • 2020] Argostemma lamxayanum, A. lobbioides, A. vientianense, et al. • Six New Species of Argostemma Wall. (Rubiaceae) from Laos

 Argostemma vientianense Lanors. & Chantar.,

Argostemma longisepalum Lanors. & Chantar.,  

Argostemma svengsuksae Lanors., Chantar. & Souvann. & 

Argostemma lamxayanum Lanors. & Chantar.

in Lanorsavanh, Chantaranothai & Souvannakhoummane, 2020.

ສະກຸນດາວຫີນ  DOI: 10.1111/njb.02714 

phakhaolao.la 

  KKU.ac.th 

 facebook.com/SoulivanhLanorsavanh

Abstract

Argostemma Wall. is a large genus of herbaceous plants in the tribe Argostemmateae (Rubiaceae–Rubioideae), mainly distributed in Southeast Asia and its taxonomy is far from completely known. Eight species of Argostemma were previously reported from Laos, but we here add six more species (Argostemma lamxayanum, A. lobbioides, A. longisepalum, A. paksongense, A. svengsuksae and A. vientianense) which are all new to science. The new species were found in limestone habitats in southern and central Laos. Detailed descriptions, illustrations, photographs and a key to all the known species in Laos are provided.

Argostemma lamxayanum sp. nov.
(A) habitat and habit, (B) habit, (C) inflorescence 

Photos by S. Lanorsavanh.

Argostemma lamxayanum Lanors. & Chantar., sp. nov.

Etymology: The specific epithet is to honor Associate Prof. Vichith Lamxay, Dept of Biology, Faculty of Natural Science, National Univ. of Laos, who encouraged the first author to intensively study the Lao Flora.

Argostemma lobbioides Lanors., Chantar. & Souvann., sp. nov.

Etymology: The specific epithet lobbioides refers to its morphological similarity to A. lobbii.

Argostemma longisepalum Lanors. & Chantar., sp. nov.

Etymology: The specific epithet refers to the long sepal.

Argostemma paksongense Lanors. & Chantar., sp. nov. 

Etymology: The specific epithet refers to the Paksong district where the species grows.

Argostemma svengsuksae Lanors., Chantar. & Souvann., sp. nov.

Etymology: The taxon is named after emeritus Associate Prof. Bouakhaykhone Svengsuksa, Dept of Biology, Faculty of Natural Science, National Univ. of Laos, who directed the first author to study the flowering plants for the Lao Flora.

Argostemma vientianense Lanors. & Chantar., sp. nov.

Etymology: The specific epithet refers to the Vientiane province, the collection locality.

 

Soulivanh Lanorsavanh, Pranom Chantaranothai and Keooudone Souvannakhoummane. 2020. Six New Species of Argostemma Wall. (Rubiaceae) from Laos. Nordic Journal of Botany. 38(10); DOI: 10.1111/njb.02714

 phakhaolao.la/en/news/six-new-species-argostemma-wall-rubiaceae-laos

 facebook.com/Phakhaolaoplatform/posts/658489141536663

 twitter.com/NordicJBotany/status/1330526766356697088

 facebook.com/SoulivanhLanorsavanh/posts/3281680675220686

           

 ພົບ 6 ພືດຊະນິດໃໝ່ໃນປະເທດລາວ ຕະກຸນດອກເຂັມ ສະກຸນດາວຫີນ Argostemma Wall. (Rubiaceae) 

✨ ຕີພິມລ່າສຸດໃນ Nordic Journal of Botany ວັນທີ 13/10/2020 

ຊົມເຊີຍ Soulivanh Lanorsavanh ນັກຄົ້ນຄວ້າຄະນະວິທະຍາສາດທຳມະຊາດ ມະຫາວິທະຍາໄລແຫ່ງຊາດລາວ,  Keooudonia Souvanakhoummanianum ຜູ້ຈັດການຂໍ້ມູນພາເຂົ້າລາວ/ນັກຄົ້ນຄວ້າກ່ຽວກັບພືດສາດ ,​ ແລະ  Pranom Chantaranothai ນັກຄົ້ນຄວ້າ ຄະນະວິທະຍາສາດທຳມະຊາດ ມະຫາວິທະຍາໄລຂອນແກ່ນ ປະເທດໄທ

พบพืชชนิดใหม่ของโลก อีก 6 ชนิด! โดยนักวิจัยคณะวิทย์ฯ มข. ร่วมกับอาจารย์ ม.แห่งชาติลาว และสถาบันวิจัยการเกษตรและป่าไม้แห่งชาติลาว

th.kku.ac.th/40906/

      

[Botany • 2020] Begonia colliculata (Begoniaceae: Section Platycentrum) • A New Species from Nam Kading National Protected Area, Bolikhamxai Province, Laos

Begonia colliculata  Souvann. & Lanors.

in Souvannakhoummane, Lanorsavanh, Park, et al., 2020.

ສົ້ມກຸ້ງແດງ  ||  DOI: 10.20531/tfb.2020.48.2.04 

 facebook.com/DoneSabaidee

ABSTRACT

Begonia colliculata is described and illustrated with photographs from Nam Kading National Protected Area, in the Bolikhamxai Province of Laos.

Keywords: Begonia, Biodiversity, Laos, new taxon, taxonomy

Figure 1. Begonia colliculata Souvann. & Lanors.:
A habit; B. stipule; C. pistillate flowers, front view; D. pistillate flowers, lateral view; E. styles and stigma; F. cross section of fruit; G. staminate flowers, front view; H. staminate flowers, back view; I. stamens; Drawn by K. Souvannakhoummane from SL1999 (HNL).

Figure 2. Begonia colliculata Souvann. & Lanors.:
 A habit; B. staminate inflorescence; C. pistillate inflorescence; D. fruit, lateral view; E. pistillate flower, front view; F. pistillate flower, lateral view; G. staminate flowers, back view; H. staminate flowers, front view;

 scale bar: 1 cm; photo by S. Lanorsavanh from SL1999 (HNL).

Begonia colliculata Souvann. & Lanors., sp. nov.

(Section Platycentrum). 

Begonia colliculata is similar to Begonia hekouensis S.H.Huang, but differs in having ver-rucous peduncles (vs densely villous), bracts with a strigose margin (vs ciliate), sparsely strigose tepals (vs villous), a sparsely strigose and colliculate ovary with a broadly falcate-elongate dorsal wing (vs densely purplish brown villous and not colliculate, dorsal wing ligulate). It is also similar to B. croceaC.-I Peng but differs in having a cane-like stem (vs stemless), leave blade ovate-lanceolate (vs broadly ovate), inflorescences arising from axils on the stem (vs arising directly from the horizontal rhizome) and anthers elliptic-oblong, apex rounded (vs fusiform-obovate, apex acuminate) (Table 1).

Entomology.— The specific epithet “colliculata”refers to the colliculate surface of the ovary and fruit.

Vernacular.—  ສົ້ມກຸ້ງແດງ - Som koung deang  (Red begonia).

Keooudone Souvannakhoummane, Soulivanh Lanorsavanh, Jeong Ho Park, Ho Sang Kang, Tai Hyeon Ahn, Singkone Xayalath and Chanhsamone Phongoudom. 2020. Begonia colliculata (Begoniaceae), A New Species from Nam Kading National Protected Area, Bolikhamxai Province, Laos. Thai Forest Bulletin (Botany). 48(2); 108-113. DOI: 10.20531/tfb.2020.48.2.04

  facebook.com/groups/168567307206461/permalink/687046078691912

ມະຫັດສະຈັນພັນພືດຂອງປ່າສະຫງວນແຫ່ງຊາດນ້ຳກະດິງ

ຄົ້ນພົບພືດຊະນິດໃໝ່ຫຼາຍຊະນິດທີ່ມີລັກສະນະໂດດເດັ່ນ ເຊິ່ງຊີ້ວັດໃຫ້ເຫັນເຖິງຄວາມອຸດົມສົມບູນຂອງປ່າສະຫງວນແຫ່ງຊາດນ້ຳກະດິງ

 PhaKhaoLao.la/en/node/2730

[Botany • 2020] Capparis macrantha (Capparaceae) • A New Shrub Species from A Deciduous Forest of the Nam Kading National Protected Area (central Lao PDR)

Capparis macrantha Souvann., Fici & Lanor.,

in Souvannakhoummane, Fici, Lanorsavanh, ... et Bounithiphonh, 2020. 

DOI: 10.5852/ejt.202.656 

Abstract

Capparis macrantha Souvannakhoummane, Fici & Lanorsavanh sp. nov., a new shrub species characterized by erect or ascending habit, stipular thorns, large lanceolate-elliptic leaves and large flowers in supra-axillary rows, is described and illustrated from the deciduous forest in Nam Kading National Protected Area (central Lao PDR). The new species belongs to Capparis sect. Monostichocalyx Radlk. and is morphologically similar to C. radula Gagnep., a shrub widespread in the Indochinese area, differing in the shorter, straight stipular thorns, larger leaves, larger sepals and petals, higher number of stamens with longer filaments and longer gynophore and ovary. Its affinities with related taxa are discussed and a key is provided for the species of Capparis L. known from Lao PDR. The conservation status of the new species is provisionally assessed as Vulnerable (VU D1).

Keywords: Bolikhamxai Province; Capparaceae; Capparis sect. Monostichocalyx; diversity; ecology

Fig. 1. Capparis macrantha Souvannakhoummane, Fici & Lanorsavanh sp. nov.

A. Flowering branch. B. Flower (lateral view). C. Flower (front view). D. Stipular thorn and petiole. E. Sepals. F. Petals. G. Gynophore and ovary. H. Stamens. 

Drawn from holotype (Lanorsavanh et al. SL1641) by K. Souvannakhoummane.

Fig. 2. Capparis macrantha Souvannakhoummane, Fici & Lanorsavanh sp. nov. 

A. Habit and detail of a branch bearing thorns. B. Flowering branch. C. Young twigs. D. Young leaves. E. Flower (top view). F. Flower (lateral view). G. Petal (outside view).

 Photos by S. Lanorsavanh.

Class Magnoliopsida Brongn.

Order Brassicales Bromhead

Family Capparaceae Juss.

Genus Capparis L.

Section Monostichocalyx Radlk.

Capparis macrantha Souvannakhoummane, Fici & Lanorsavanh sp. nov. 

Diagnosis: A C. radula Gagnep. stipulis rectis brevioribus, foliis majoribus, sepalis petalisque majoribus, staminum numero superiore, filamentis longioribus, gynophoro atque ovario longioribus praecipue differt. 

Etymology: The specific epithet is composed of the Greek words ʻmakrósʼ, meaning ʻlargeʼ, and ʻánthosʼ, ʻflowerʼ.

Distribution, habitat and phenology: The new species is so far known from a single location in the Nam Kading National Protected Area in Bolikhamxai Province, ... (Fig. 3). Capparis macrantha sp. nov. has been observed in mixed deciduous forest on limestone, at ca 200–230 m elevation, with Amorphophallus laoticus Hett., Arisaema Mart. sp., Wurfbainia glabrifolia (Lamxay & M.F.Newman) Škorničk. & A.D.Poulsen. The flowering occurs from May to June.

 Keooudone Souvannakhoummane, Silvio Fici, Soulivanh Lanorsavanh, Jeong Ho Park, Ho Sang Kang and Chaloun Bounithiphonh. 2020. Capparis macrantha sp. nov. (Capparaceae, Brassicales), A New Shrub Species from A Deciduous Forest of the Nam Kading National Protected Area (central Lao PDR). European Journal of Taxonomy. 656; 1–12.  DOI: 10.5852/ejt.202.656

[Botany • 2020] Begonia phouchomvoyensis (Begoniaceae) • A New Species from Bolikhamxai, Lao PDR

Begonia phouchomvoyensis Lanors., Lamxay & Souvann.

in  Lanorsavanh, Hughes, Souvannakhoummane & Lamxay, 2020.

  Taiwania. 65(1)

ສົ້ມກຸ້ງພູຈອມວອຍ  ||  tai2.ntu.edu.tw/taiwania 

Abstract

Begonia phouchomvoyensis, a new species from Phou Chom Voy Provincial Protected Area, Bolikhamxai province, Lao PDR, is described and illustrated. It is placed in Begonia sect. Platycentrum, and is assessed as belonging to the Vulnerable IUCN Category.

Keyword: Begonia phouchomvoyensis, Begoniaceae, biodiversity, Laos, new taxon, Phou Chom Voy, plant taxonomy

Fig. 1. Begonia phouchomvoyensis Lanors., Lamxay & Souvann.
A, habit; B, bract; C, pistillate flower; D, tepals of pistillate flowers; E, cross section of an ovary; F, style and stigmatic band; G, staminate flower, face view; H, anthers dorsal, face and lateral view; I, fruits lateral view. Scale bars: A, 3 cm; B-E, G and I, 1 cm; F, H, 1 mm. Line drawing by K. Souvannakhoummane.

Fig. 2. Begonia phouchomvoyensis Lanors., Lamxay & Souvann.
 A, rhizome; B, red hairs on young shoot; C, fruiting plant; D, flowering plant; E, inflorescences with staminate flowers and pistillate flowers; F, ripe fruit. Scale bar, 1 cm. photos, A, C & F by Soulivanh Lanorsavanh; B, D-E, by Vichith Lamxay.

Begonia phouchomvoyensis Lanors., Lamxay & Souvann., sp. nov. 

 Begonia Sect. Platycentrum (Klotzsch) A. DC. 

Similar to Begonia tamdaoensis C.-I Peng in habit, leaf shape, and having three styles, but differing in the glabrous stipules (vs. sparsely hispid), adaxial leaf surface strigose (vs. glabrous to subglabrous), pistillate flowers with three tepals (vs. five) and three-locular ovaries (vs. two-locular). Also similar to Begonia sinovietnamica C.Y.Wu in habit, but differing in the pistillate flowers with three tepals (vs. five) and outer tepals sparsely villous (vs. glabrous).

  

Distribution. Only known from Phou Chom Voy Provincial Protected Area, Bolikhamxai Province, Lao PDR. 

Ecology and phenology. Grows in evergreen montane forest near the summit of the range, 1200–1350 m a.s.l., in wet soil and rocks near streams. Flowering from November to December, fruiting January to Mach. 

Vernacular name. Som Koung Phou Chom Voy - ສົ້ມກຸ້ງພູຈອມວອຍ (suggested here).

Notes. The three species B. phouchomvoyensis, B. sinovietnamica and B. tamdaoensis appear to be closely allied, although they currently differ in sectional placement, with B. sinovietnamica being in sect. Diploclinium, and the other two species being in sect. Platycentrum (Moonlight et al. 2018). The placement of the rhizomatous species B. sinovietnamica is aberrant as sect. Diploclinium is composed of tuberous species, and it may fit better in sect. Platycentrum. The placement of B. phouchomvoyensis and B. tamdaoensis is somewhat aberrant for sect. Platycentrum as both possess three styles (not two as is usual for the section), and B. phouchomvoyensis has three-locular fruit; however, the combination of rhizomatous habit and axial placentation fit well for the section. The specific epithet ‘phouchomvoyensis’ is derived from the name of the type locality.

Soulivanh Lanorsavanh, Mark Hughes, Keooudone Souvannakhoummane and Vichith Lamxay. 2020. Begonia phouchomvoyensis (Begoniaceae), A New Species from Lao PDR. Taiwania. 65(1); 37-40. DOI: 10.6165/tai.2020.65.37 

 tai2.ntu.edu.tw/taiwania/abstract.php?type=abstract&id=1651 

https://laoepf.org.la/wp-content/uploads/formidable/21/PCV-Mgt-Plan_Final_Eng-6.pdf
https://www.pha-tad-ke.com/wp-content/uploads/2016/10/Newsletter-PTK-2-Lao.pdf

ສົ້ມກຸ້ງພູຈອມວອຍ 

ພືດຊະນິດພັນໃໝ່ຂອງໂລກ ຈາກທີມງານ ອຈ ຄະນະວິທະຍາສາດທຳມະຊາດ ມຊ