[Botany • 2019] Begonia maguniana (Begoniaceae, sect. Oligandrae) • A New Species from New Guinea

Begonia maguniana H.P.Wilson

in Wilson, Paul & Hughes, 2019.

  DOI: 10.1017/S0960428619000283  

  twitter.com/Hannahan89 

Abstract

The new species Begonia maguniana H.P.Wilson from New Guinea is described. It is endemic to the Central Range of New Guinea at altitudes of c.1700–2300 m and belongs to the IUCN category Least Concern.

Keywords: Begonia, biodiversity, New Guinea, new species, taxonomy

Fig. 1. Begonia maguniana H.P.Wilson, sp. nov.
A, Habit; B, female flower; C, female flower and ovary; D, male flower; E, ripe fruit; F, leaf lamina (upper surface).

(Photographs: A, B and E, Mark Hughes; C, D and F, Hannah Wilson.)

  DOI: 10.1017/S0960428619000283 

   twitter.com/Hannahan89 

Begonia maguniana H.P.Wilson sp. nov.

Etymology. Begonia maguniana is named after Thomas Magun (LAE Herbarium, Papua New Guinea), who, with Axel Poulsen, collected this species in Telefomin in April 2017.

H. P. Wilson, O. Paul and M. Hughes. 2019. Begonia maguniana (Begoniaceae, Begonia sect. Oligandrae), A New Species from New Guinea. Edinburgh Journal of Botany. DOI: 10.1017/S0960428619000283   

 twitter.com/Hannahan89/status/1176144730247323648

[Botany • 2019] Begonia rheophytica (Begoniaceae) • A New Species of Begonia from northern Myanmar with An Updated Checklist of Begonia in Myanmar

 Begonia rheophytica M.Hughes

in Hughes, Aung & Armstrong, 2019. 

  DOI: 10.1017/S0960428619000052  

 rbge.org.uk twitter.com/markhughesis 

Abstract

A new species, Begonia rheophytica (§ Platycentrum), is described from northern Myanmar; it was initially confused with B. rhoephila, which is confined to Peninsular Malaysia. Comparison with other species with a rheophytic leaf shape is made. This new addition brings the number of currently recognised Begonia species in Myanmar to 73. An updated checklist of Myanmar Begonia species is also included.

Keywords: Biodiversity, Hkakaborazi National Park, Kachin State, Myanmar, taxonomy

FIG . 1.  Begonia rheophytica M.Hughes, sp. nov. A, Habit in the field (note water level at the base of the image); B, abaxial surface of petiole, showing short curled hairs; C, inflorescence; D, adaxial (left) and abaxial (right) leaf surface.

A–D, Armstrong et al. 3041. All scale bars, 1 cm.

Begonia rheophytica M.Hughes, sp. nov. 

§ Platycentrum. 

Etymology. Named after the rheophytic habit of the species (rheo-, pertaining to flowing water [Greek]).

M. Hughes, M. M. Aung and K. Armstrong. 2019. An Updated Checklist and A New Species of Begonia (B. rheophytica) from Myanmar. Edinburgh Journal of Botany. DOI: 10.1017/S0960428619000052

 rbge.org.uk/media/5976/an_updated_checklist_and_a_new_species_of_begonia_b_rheophytica_from_myanmar.pdf

 rbge.org.uk/about-us/organisational-structure/staff/tropical-diversity/dr-mark-hughes/

 twitter.com/markhughesis/status/1112640218384031744

    

[Botany • 2018] Taxonomic Notes on the Philippine Endemic Begonia colorata (Begoniaceae, section Petermannia)

Begonia colorata Warb.

in Naive, Alejandro & Hughes, 2018. 

DOI:  10.11646/phytotaxa.381.1.16  

 twitter.com/markhughesis

Abstract 

Recent exploration in Mt. Ararat, Bayugan City, Agusan del Sur resulted in a collection initially identified as Begonia bolsteri, a poorly known Philippine endemic species first described over a century ago. Examination of the types of this species and the type of B. colorata led us to the conclusion that these names represent the same taxon, and we place them in synonymy under the earlier name of B. colorata and designate lectotypes for both names. In this paper, we provide a comprehensive description for the species and photographs to facilitate easy identification. 

Keywords: Agusan del Sur, Mindanao, taxonomy, tropical botany, typification

FIGURE 1. Begonia colorata Warb. A, Habit; B, Detail of leaf; C, Staminate flower, scale bar 5 mm; D, Pistillate flower, scale bar 5 mm; E, Capsule, scale bar 1 cm.

Photos by MAK Naive.

Begonia colorata Warburg (1904: 51). 

Type:—PHILIPPINES. Mindanao, Sibulan, July 1888, Warburg 14633

 (lectotype B[B100238148!] designated here) Fig. 1. 

= Begonia bolsteri Merr. (1911: 387) syn. nov. Type:—PHILIPPINES. Mindanao, Province of Surigao, in damp shaded places, elev. 75 m, April 1906, Bolster 310 (lectotype B[100238109!], designated here; isolectotypes K[000761015!], PNH [112576-image!], US [00115258-image!]).

Distribution:— PHILIPPINES. Biliran, Mindanao, Luzon, Visayas (Pelser et al. 2011; Hughes et al. 2015–), Fig. 2. 

Ecology:— Growing in damp areas under a semi-open to closed canopy in primary and secondary forest at an elevation of 75–700 m asl.

Mark Arcebal K. Naive, Grecebio Jonathan D. Alejandro and Mark Hughes. 2018. Taxonomic Notes on the Philippine Endemic Begonia colorata (Begoniaceae, section Petermannia).  Phytotaxa. 381(1); 127–131. DOI:  10.11646/phytotaxa.381.1.16  

 twitter.com/markhughesis/status/1070995585451393025

    

[Botany • 2018] Dividing and Conquering the Fastest-growing Genus: Towards A Natural Sectional Classification of the Mega-diverse Genus Begonia (Begoniaceae)

Begonia spp.

in Moonlight, Ardi, Arroyo Padilla, Chung, Fuller, et al., 2018.

DOI:  10.12705/672.3 

twitter.com/PeterMoonlight 

 facebook.com: Mark Hughes

Abstract

The pantropical genus Begonia is the sixth-largest genus of flowering plants, including 1870 species. The sections of Begonia are used frequently as analogues to genera in other families but, despite their taxonomic utility, few of the current sections have been examined in the light of molecular phylogenetic analyses. We present herein the largest, most representative phylogeny of Begonia published to date and a subsequent provisional sectional classification of the genus. We utilised three plastid markers for 574 species and 809 accessions of Begonia and used Hillebrandia as an outgroup to produce a dated phylogeny. The relationships between some species and sections are poorly resolved, but many sections and deeper nodes receive strong support. We recognise 70 sections of Begonia including 5 new sections: Astrothrix, Ephemera, Jackia, Kollmannia, and Stellandrae; 4 sections are reinstated from synonymy: Australes, Exalabegonia, Latistigma and Pereira; and 5 sections are newly synonymised. The new sectional classification is discussed with reference to identifying characters and previous classifications.

Keywords: Begonia; dating; phylogenetics; sectional classification

          

Begonia (sect. Jackia) sublobata Jack, on Pulau Pasumpahan, Sumatra

 twitter.com/markhughesis

 Peter W. Moonlight, Wisnu H. Ardi, Luzmila Arroyo Padilla, Kuo-Fang Chung, Daniel Fuller, Deden Girmansyah, Ruth Hollands, Adolfo Jara-Muñoz, Ruth Kiew, Wai-Chao Leong, Yan Liu, Adi Mahardika, Lakmini D.K. Marasinghe, Meriel O'Connor, Ching-I Peng, Álvaro J. Pérez, Thamarat Phutthai, Martin Pullan, Sangeeta Rajbhandary, Carlos Reynel, Rosario R. Rubite, Julia Sang, David Scherberich, Yu-Min Shui, Mark C. Tebbitt, Daniel C. Thomas, Hannah P. Wilson, Nura H. Zaini and Mark Hughes. 2018.  Dividing and Conquering the Fastest-growing Genus: Towards A Natural Sectional Classification of the Mega-diverse Genus Begonia (Begoniaceae). Taxon. 67(2); 267-323. DOI:  10.12705/672.3

Begonia sect. Jackia, named after the indefatigable Aberdonian botanist William Jack, is one of 5 new Begonia sections published today @TheBotanics. Pic is the type, B. sublobata Jack, on Pulau Pasumpahan, Sumatra. DOI:  10.12705/672.3  for IAPT members or PM me for the paper

 twitter.com/markhughesis/status/994208418469687296

twitter.com/PeterMoonlight/status/994196902584479744

 facebook.com/photo.php?fbid=10213926341885373

[Botany • 2018] Begonia lecongkietii • A New Species of Begonia (sect. Petermannia) from Mount Dầu, South Central Coast Region, Vietnam

 Begonia lecongkietii N.S.Lý & M.Hughes

in Lý, Peng & Hughes, 2018.

 DOI:  10.1017/S0960428618000033 

Abstract

A new species of Begonia (B. lecongkietii N.S.Lý & M.Hughes) is described from Mount Dầu in the South Central Coast Region, Vietnam, an area with an abundance of recently described endemic plant taxa. The new species is allied to Begonia lamxayana Souvann., which occurs 600 km away in Laos, differing chiefly in having larger villose tepals with an undulate margin and larger androecium with 86–116 (versus 20–30) stamens. Begonia lecongkietii is considered Critically Endangered, owing to its small area of occupancy and decline of habitat quality.

Keywords: Biodiversity, conservation, endemism, taxonomy

Fig. 1. Begonia lecongkietii. A and B, Plants in their natural habit; C, inflorescences showing female flowers of different colours; E, detail of male and female flowers; F, top view of androecium; G, close-up of female flower; H, detail of stigma.

Scale bars: E–H, 10 mm.
Photograph by Ngo. c-Sâm Lý: A, Lý 572; B–J, Lý 608.

Begonia lecongkietii N.S.Lý & M.Hughes, sp. nov. Sect. Petermannia 

Distribution: Begonia lecongkietii is endemic to Quảng Ngãi Province in the South Central Coast Region, Vietnam.

Etymology. Named in honour of Professor Lê Công Kiệt, University of Science, Vietnam National University, Ho Chi Minh City, for his long-time contribution to Vietnamese botany

N.-S. Lý, C.-I. Peng and M. Hughes. 2018. Begonia lecongkietii (sect. Petermannia), A New Species from Mount Dầu, South Central Coast Region, Vietnam. Edinburgh Journal of Botany. DOI:  10.1017/S0960428618000033

 twitter.com/markhughesis/status/969520192509399040

[Botany • 2017] Begonia exposita, B. pengchingii, B. phutthaii & B. pseudosubperfoliata • Four New Species of Begonia (Begoniaceae) from Thailand

 Begonia pengchingii    Phutthai & M.Hughes

DOI:  10.1017/S0960428617000051 

Abstract

Four new species of Begonia are described from Northern, Peninsular and Southwestern Thailand. Three belong to Begonia sect. Diploclinium (Begonia exposita Phutthai & M.Hughes, Begonia pengchingii Phutthai & M.Hughes and Begonia pseudosubperfoliata Phutthai & M.Hughes), and one (Begonia phutthaii M.Hughes) to Begonia sect. Apterobegonia . All four species are karst limestone endemics. The provisional IUCN status of all the new species is ‘Vulnerable’.

• Begonia exposita Phutthai & M.Hughes sp. nov. Sect. Diploclinium. 

The habit resembles that of Begonia putii Craib, B. discreta Craib and B. soluta Craib in terms of the small number of cordate leaves arising directly from a tuber. Begonia putii and B. soluta differ in being smaller plants, ..... 

 Type: Thailand, Sangkhla Buri District. On exposed limestone in direct sunlight area, .... (holo BKF; iso E, PSU).

Begonia pengchingii Phutthai & M.Hughes, Habit and habitat 

• Begonia pengchingii Phutthai & M.Hughes sp. nov. Sect. Diploclinium. 

 A distinct species, closest to Begonia discreta in having 1 or 2 elongate-cordate symmetrical or subsymmetrical leaves and inflorescence arising from the tuber. ....

 Type: Thailand, Chiang Rai, Mae Sai District. On limestone cliff face in deep shade of summit cliff, 1350 m, .... (holo HAST; iso BKF, E).

ส้มกุ้งเมืองเหนือ Begonia pengchingii Phutthai & M. Hughes พืชถิ่นเดียวของประเทศไทย พบที่ภูเขาหินปูนในจังหวัดเชียงรายและเชียงใหม่ ตั้งชื่อให้เป็นเกียรติแก่ผู้ที่เก็บตัวอย่างนี้เป็นครั้งแรก

Begonia phutthaii M.Hughes, Habit, habitat and inflorescence 

• Begonia phutthaii M.Hughes sp. nov. Sect. Apterobegonia. 

Differs from the allied Begonia delicatula in having caducous (not persistent) stipules, a denser indumentum over all vegetative parts (B. delicatula has glabrous stems, not densely hairy, and leaves with scattered, not dense hairs). .... 

 Type: Thailand, Mae Hong Son, Pang Ma Pha District, Road between Pai and Pang Ma Pha. On vertical limestone in deep shade of dry evergreen forest on limestone, .... (holo E; iso BKF, SING).  

• Begonia pseudosubperfoliata Phutthai & M.Hughes sp. nov. Sect. Diploclinium. 

Resembles Begonia subperfoliata Parish ex Kurz in habit but differs in having 5 tepals in the female flowers (not 2) and glabrous lanceolate bracts (not deeply dissected and papillose). Also similar to Begonia rabilii Craib in habit but differs in having 5 tepals in the female flowers (not 4), and leaves with a more deeply crenate margin. 

Type: Thailand, Chon Buri, Bo Thong District, Khao Cha Ang On cave. On limestone karst in deep shade, 350 m altitude, 10 ix 2007, T. Phutthai 162 (holo BKF; iso E, PSU).

 Thamarat Phutthai and M. Hughes. 2017. Four New Species of Begonia (Begoniaceae) from Thailand.  Edinburgh Journal of Botany. DOI:  10.1017/S0960428617000051

http://www.rbge.org.uk/assets/files/science/6.1_Tropical/Thai%20beg%204.pdf

 Four new Begonia species for Thailand today, 2 named after great botanists T.Phutthai and Ching-I Peng @TheBotanics thanks to @NewtonFund

twitter.com/markhughesis/status/841969993076076545   @markhughesis   

[Botany • 2017] Begonia tenasserimensis | ส้มกุ้งตะนาวศรี • A New Species of Begonia section Parvibegonia (Begoniaceae) from Thailand and Myanmar

ส้มกุ้งตะนาวศรี | Begonia tenasserimensis Phutthai & M. Hughes

DOI:  10.3767/000651917X695083 

Abstract 

Begonia tenasserimensis sp. nov. belongs to Begonia sect. Parvibegonia and is endemic to the hills of the Tenasserim Range, based on specimens from Peninsular Thailand and Tenasserim Division in Myanmar. The species is restricted to karst limestone and has been assessed as Vulnerable according to IUCN criteria.

Keywords: Southeast Asia; limestone; taxonomy

Fig. 1 Begonia tenasserimensis Phutthai & M.Hughes.
 b. Adaxial and abaxial leaf lamina; c. inflorescence; d. staminate flower; e. glandular hairs on ovary; f. pistillate flower; g. maturing capsule with persistent tepals.

— Photos by T. Phutthai. 

 DOI:  10.3767/000651917X695083

Begonia tenasserimensis Phutthai & M. Hughes, sp. nov. 

Begonia tenasserimensis is vegetatively similar to and shares the presence of persistent tepals when the fruit matures with B. crenata Dryand., but differs from that species in having an acutely lobed leaf lamina with 3 main veins (vs unlobed with 5 main veins) and a shortly spinose dentate leaf margin (vs crenate), pistillate flowers with 5 tepals (vs 6) and staminate flowers with lanceolate inner tepals (vs broadly elliptic), and a more branched inflorescence.

Etymology. The specific epithet ‘tenasserimensis’ is derived from the Tenasserim Range to where the species is endemic.

  T. Phutthai and M. Hughes. 2017. A New Species of Begonia section Parvibegonia (Begoniaceae) from Thailand and Myanmar.  Blumea - Biodiversity, Evolution and Biogeography of Plants.  DOI:  10.3767/000651917X695083

ส้มกุ้งตะนาวศรี Begonia tenasserimensis Phutthai & M. Hughes พบในเขตจังหวัดระนอง สตูล และเขตเทือกเขาตะนาวศรี สาธารณรัฐแห่งสหภาพเมียนมา  เป็นพืชถิ่นเดียวของไทยและเมียนมา สถานภาพเสี่ยงต่อการสูญพันธุ์

  

[Botany • 2016] Begonia khaophanomensis | ส้มกุ้งเขาพนม • A New Species and A New Record in Begonia sect. Platycentrum (Begoniaceae) from Thailand

ส้มกุ้งเขาพนม |  Begonia khaophanomensis 

Phutthai & M.Hughes SBG.org.sg

ABSTRACT

 Begonia khaophanomensis Phutthai & M.Hughes is described from a collection made on granitic rock in Krabi Province in Peninsular Thailand. It is endemic to the type locality of Khao Phanom Bencha National Park, and is assessed as Least Concern using the IUCN criteria. Begonia macrotoma Irmsch. is noted as a new record for Thailand from collections in Chiangmai, Nakhon Ratchasima and Nakhon Nayok provinces; the species is also found in China, Myanmar, NE India, Nepal and Vietnam. Both species belong to Begonia sect. Platycentrum. A key to the species of Begonia sect. Platycentrum in Thailand is provided.

Keywords. Begonia khaophanomensis, Begonia macrotoma, China, Myanmar, NE India, Nepal, Peninsular Thailand, Vietnam

Begonia khaophanomensis Phutthai & M.Hughes, sp. nov. § Platycentrum

Begonia khaophanomensis is similar to B. palmata in habit and leaf shape, but differs in having leaves occurring in opposite pairs at the apex of the plant (not alternate), with white short stiff hairs on the petioles and leaves (not brown sericeous), and a white ovary with white short stiff hairs (not pinkish green and subglabrous). 

– TYPE: Thailand, Krabi, Khao Phanom District, Khao Phanom Bencha National Park, on rock along trail in lower montane forest, 19 June 2006, Williams, K., Pooma, R., Poopath, M., Chamchamroon, V. & Seasin, S. 1943 (holotype E; isotypes BKF). (Fig. 1, 2)

Distribution. Endemic to Peninsular Thailand (known from only the type locality). 

Habitat and ecology. On granitic rock crevices by streams in hill evergreen forest and seasonally dry evergreen forest at c. 1200 m. Flowering and fruiting June to October.

Notes. The opposite leaves and stiff hairs indicate an alliance to Begonia areolata Miq. from Sumatra and Java which differs in having leaves which are minutely bullate and with red hairs, and in having petals which are elongate-elliptic in the male flowers (not broadly elliptic). The specific epithet refers to the district in which the type material was collected, Khao Phanom.

T. Phutthai and M. Hughes. 2016. A New Species and A New Record in Begonia sect. Platycentrum (Begoniaceae) from Thailand. Gardens’ Bulletin Singapore. 68(1): 99–107.  https://www.sbg.org.sg/images/4_4_Research_Gardens_Bulletin/4_4_68_1_pdf_Vol_68_Part_1_2016/4_4_68_1_99_y2016_V68P1_GBS_pg99.pdf

ส้มกุ้งเขาพนม Begonia khaophanomensis Phutthai & M.Hughes จากการศึกษาตัวอย่างในหอพรรณไม้ทั้งในและต่างประเทศ พบแห่งเดียวในโลกที่ เขาพนมเบญจา จังหวัดกระบี่

นักวิจัย"ม.มหิดล" พบพืช 6 ชนิดใหม่ของโลก
http://www.dailynews.co.th/regional/368491

[Botany • 2011] Begonia afromigrata • Pliocene Intercontinental Dispersal from Africa to Southeast Asia highlighted by the New Species of Begonia sect. Tetraphila (Begoniaceae) from Laos and Thailand

Begonia afromigrata J.J. de Wilde
Fig. 1. Habit and morphology of Begonia afromigrata: A, upper leaf surface; B, lower leaf surface; C, male inflorescence; D, habit; E, male flower; F, androecium (top, side, and bottom view); G, female flower; H, side view of female flower and ovary.

All based on Rodda & Simonsson MR106 & M R107. || de Wilde et al. 2011

Abstract

A new Begonia species from Laos and Thailand is described. It belongs to Begonia sect. Tetraphila, along with 30 other species which are all endemic to Africa. This is the first record of any of the 65 currently accepted sections in Begonia transgressing continental borders. A dated molecular phylogeny places the split of the new Asian species from its African congeners during the late Miocene to the early Pleistocene. As the species is a hygromesophilous epiphyte limited to tropical forest, no suitable corridor for migration existed during that time and the cause of the Afro-Asian disjunction probably is a long-distance dispersal event. The discovery of Begonia afromigrata emphasises the importance of chance in the assembly of tropical floras.

Keywords: Begonia sect. Tetraphila; long-distance dispersal; phylogeny 

Habitat and ecology. – Without exception in field notes the plant is described as epiphytic, growing between 5 and 15 m above ground level. It has been noted as growing on a Spondias species (Anacardiaceae; P. Tribune, pers. comm.). Usually collected on dead trees or fallen branches in evergreen forest (more rarely deciduous forest) on limestone, between 600 m and 1900 m altitude. Found more often on tree trunks than smaller branches. Plants cultivated from cuttings always produce one or more male inflorescences first, followed later by female inflorescences.


de Wilde, J.J.F.E., Hughes, M., Rodda M. & Thomas D.C. 2011. Pliocene Intercontinental Dispersal from Africa to Southeast Asia highlighted by the New Species Begonia afromigrata (Begoniaceae). Taxon 60: 1685-1692.

ResearchGate.net/publication/233671035_Pliocene_intercontinental_dispersal_from_Africa_to_Southeast_Asia_highlighted_by_the_new_species_Begonia_afromigrata_(Begoniaceae)

 http://www.ingentaconnect.com/content/iapt/tax/2011/00000060/00000006/art00013

[Botany • 2014] Begonia kanburiensis | ส้มกุ้งเมืองกาญจน์ • A New Species (sect. Diploclinium, Begoniaceae) from Kanchanaburi, southwestern Thailand

ส้มกุ้งเมืองกาญจน์ | Begonia kanburiensis Phutthai
A. habitat and habit; C. inflorescence and bracts; D. staminate flower; E. pistillate flower.

ABSTRACT

Begonia kanburiensis Phutthai, a new species which belongs to Begonia section Diplocinium, was discovered in Kanchanaburi Province during surveys for a revision of the genus for the Flora of Thailand. It is a limestone endemic and its IUCN status is considered to be ‘Vulnerable’.

KEY WORDS: Begonia, new species, Thailand

 Thamarat Phutthai, Mark Hughes and Kitichate Sridith. 2014. Begonia kanburiensis (sect. Diploclinium, Begoniaceae), A New Species from Thailand. THAI FOR. BULL. (BOT.) 42: 43–47.  

http://web3.dnp.go.th/botany/PDF/TFB/TFB42/TFB42_7_p43-47.pdf

  นักวิจัยไทย ค้นพบพืชชนิดใหม่ของโลก อยู่ที่ จ.กาญจนบุรี
http://news.ch7.com/detail/118148/t.html   @bbtvchannel7

ส้มกุ้งเมืองกาญจน์ เป็นพืชถิ่นเดียวของประเทศไทย พบได้ที่อำเภอทองผาภูมิ จังหวัดกาญจนบุรี ที่เดียวเท่านั้น โดยพืชชนิดใหม่ของโลก ค้นพบโดย อาจารย์ธรรมรัตน์ พุทธไทย นักวิจัยประจำพิพิธภัณฑ์พืชแห่งภาคตะวันตก มหาวิทยาลัยมหิดล วิทยาเขตกาญจนบุรี