[Botany • 2017] Begonia ufoides (sect. Coelocentrum, Begoniaceae) • A New Species from Limestone Areas in central Guangxi, China

Begonia ufoides C.-I Peng, Y.H. Qin & C.W. Lin

DOI:  10.11646/phytotaxa.316.3.7 

Abstract

A peltate-leaved species of Begonia was recently collected from a limestone hill in central Guangxi, China. Based on a careful study of literature, herbarium material, and plants both in the wild and in cultivation reveals that it is a new species of Begonia sect. Coelocentrum, which we hereby describe as Begonia ufoides. In addition to a full taxonomic account, color plates and line drawings are provided to aid in identification. Begonia ufoides may be confused with B. umbraculifolia Y. Wan & B.N. Chang in southwestern Guangxi and B. phuthoensis H.Q. Nguyen in northern Vietnam, both of which are peltate-leaved calciphilous species in sect. Coelocentrum, but the new species  is clearly distinguishable in many morphological characters. A table comparing salient features of the three species is presented.

Keywords: Begonia, B. ufoides, China, Guangxi, Limestone, New species, Eudicots

FIGURE 2. Begonia ufoides C.-I Peng, Y.H. Qin & C.W. Lin.
A, B. Habitat and habit; C, D, E. Portion of leaf, adaxial and abaxial surfaces; F. Inflorescence; G. Staminate flower, face and side views; H. Pistillate flower, face and side views. All from Peng 24361 (HAST).

 Begonia ufoides C.-I Peng, Y.H. Qin & C.W. Lin, sp. nov. 

 Etymology:–– The specific epithet refers to the suborbicular peltate leaves. 

Yong-Hua Qin, Yong-Yan Liang, Wei-Bin Xu, Che-Wei Lin and Ching-I Peng. 2017. Begonia ufoides (sect. Coelocentrum, Begoniaceae), A New Species from Limestone Areas in central Guangxi, China. Phytotaxa. 316(3); 279–284. DOI:  10.11646/phytotaxa.316.3.7

ResearchGate.net/publication/318988981_Begonia_ufoides_Sect_Coelocentrum_Begoniaceae_a_new_species_from_limestone_areas_in_central_Guangxi_China

twitter.com/PeterMoonlight/status/906154572175085574

[Botany • 2017] Begonia ignita • A New Species (sect. Petermannia, Begoniaceae) with Orange Flowers from Sulawesi, Indonesia

Begonia ignita  C.W.Lin & C.I Peng

SBG.org.sg

ABSTRACT

 Begonia ignita C.W.Lin & C.I Peng, a new species of Begonia sect. Petermannia from Sulawesi, Indonesia, is here described and illustrated. It is distinct from other species in Begonia section Petermannia by a character combination including a procumbent stem ascending only at the apex, symmetric or subsymmetric leaves, the presence of a pale band or maculation running parallel to the leaf margin, and orange tepals. A detailed comparison with a morphologically similar species, the Sulawesi endemic Begonia mendumiae M.Hughes, is provided. 

Keywords. Begonia ignita, B. mendumiae, Indonesia, new species, Sulawesi

Fig. 2. Begonia ignita C.W.Lin & C.I Peng.
A, B. Habit, showing variation in leaf colours. C, D. 5-tepaled pistillate flower (occasional), face and side views. E. Inflorescence, showing 2-tepaled staminate flowers. F. Staminate flower, face view. G. 4-tepaled pistillate flower in inflorescence. H. 2-tepaled pistillate flower (occasional). I. Cross section of ovary showing axile, bilamellate placentae. (Photos: Y.-Z. Siaw) 

Begonia ignita C.W.Lin & C.I Peng, sp. nov. § Petermannia 

This species is distinct from other species in Begonia section Petermannia by a character combination including a procumbent stem ascending only at the apex, symmetric or subsymmetric leaves, the presence of a pale band or maculation running parallel to the leaf margin, and orange tepals.

 – TYPE: Collected in Indonesia, Sulawesi, precise locality unknown, grown in cultivation in Bogor Botanic Gardens and vouchered on 9 October 2016 as Wisnu H. Ardi WI 117 (holotype BO; isotype SING). (Fig. 1, 2)

Distribution. Only known from cultivation; likely endemic to Sulawesi (see Notes). 

Etymology. The specific epithet refers to the flame-coloured tepals (Latin: igneus – flame-coloured).

C.-W. Lin, D.C. Thomas, W.H. Ardi and C.-I Peng. 2017. Begonia ignita (sect. Petermannia, Begoniaceae), A New Species with Orange Flowers from Sulawesi, Indonesia. Gardens’ Bulletin Singapore. 69(1); 89–95. DOI: 10.3850/S2010098116000081

https://www.sbg.org.sg/images/4_4_Research_Gardens_Bulletin/4_4_69_1_pdf_Vol_69_Part_1_2017/69_1_89_y2017_V69P1_GBS_pg89.pdf

ResearchGate.net/publication/317089744_Begonia_ignita_sect_Petermannia_Begoniaceae_a_new_species_with_orange_flowers_from_Sulawesi_Indonesia

[Botany • 2017] Begonia myanmarica • A New Species (Begoniaceae) from Myanmar, and Molecular Phylogenetics of Begonia sect. Monopteron

Begonia myanmarica C.-I Peng & Y. D. Kim

 a Habit and habitat. f Male flower, face view. g Male flower, side view. h Female flower, face view. i Female flower, side view. 

DOI: 10.1186/s40529-017-0175-9  

 Abstract

Background

A new species, Begonia myanmarica, was discovered from Myanmar and herein documented. Characterized by a single developed wing in the ovary/fruit, this species would be assigned to sect. Monopteron (sensu Doorenbos et al. in The sections of Begonia including descriptions, keys and species lists: studies in Begoniaceae VI. Wageningen Agricultural University, Wageningen, 1998) that is known by B. griffithiana and B. nepalensis from the Himalaya. To confirm its sectional assignment, we conducted morphological, phylogenetic and cytological studies.

Results

Morphological observations indicated that B. myanmarica was distinguishable from the two known species of sect. Monopteron by the leaf shape and size, 1-locular ovary, parietal placentation and chromosome number. Molecular phylogenetic analysis using nrITS sequences showed that B. myanmarica was not allied with the clade of sect. Monopteron, though both were nested within sect. Platycentrum-sect. Sphenanthera clade.

Conclusions

Studies of morphology, molecular phylogenetics and cytology support the recognition of the new species, Begonia myanmarica, which is fully described and illustrated. Our results also indicate that B. myanmarica is not closely related to species previously assigned to sect. Monopteron, suggesting that the fruit morphology of a single developed wing in the ovary/fruit characterizing sect. Monopteron is homoplasious.

Keywords: Begonia griffithiana; Begonia nepalensis;Chromosome; Morphology

Begonia myanmarica C.-I Peng & Y. D. Kim

DOI: 10.1186/s40529-017-0175-9

Diagnosis: Begonia myanmarica is a unique species with an erect habit; large, ovate to broadly ovate leaves (ca. 20–40 cm long, 22–30 mm across); sole, much protruded wing in ovary/fruit; 1-locular ovary with parietal placentation and 2 placentae; and the somatic chromosomes are determined as 2n = 38.

Etymology: The epithet refers to Myanmar (formerly Burma) where it was discovered.

Fig. 2 Begonia myanmarica C.-I Peng & Y. D. Kim.
a Habit and habitat. b Cultivated plant at anthesis. c Leaf abaxial view. d Stipule. e Bract. f Male flower, face view. g Male flower, side view. h Female flower, face view. i Female flower, side view. j Cross section of ovaries. k Capsule

DOI: 10.1186/s40529-017-0175-9

Conclusion: 

Studies of morphology, molecular phylogenetics and cytology support the recognition of the new species, Begonia myanmarica, which is fully described and illustrated. Our results also indicate that B. myanmarica is not closely related to species previously assigned to sect. Monopteron, suggesting that the fruit morphology of a single developed wing in the ovary/fruit characterizing sect. Monopteron is homoplasious.

Yu-Hsin Tseng, Young-Dong Kim, Ching-I Peng, Khin Myo Htwe, Seong-Hyun Cho, Yoshiko Kono and Kuo-Fang Chung. 2017. Begonia myanmarica (Begoniaceae), A New Species from Myanmar, and Molecular Phylogenetics of Begonia sect. Monopteron.  Botanical Studies. DOI: 10.1186/s40529-017-0175-9

[Botany • 2015] Begonia difformis • A New Species (Sect. Platycentrum, Begoniaceae) segregated from B. palmata D. Don. distributed in Yunnan, China

Begonia difformis

  (Irmsch.) W.C. Leong, C.I Peng & K.F Chung

FIGURE 1. Begonia difformis (A, B, E, F) and B. palmata (C, D).
A. Habitat. B. Habit. C. Male and female flowers. D, E. Abaxial surface of staminate flower, note the red-m on tepals of B. difformis (E). F. Pistillate flower.

Scale bars A–C. 4 cm. D–F. 1 cm. || DOI: 10.11646/phytotaxa.227.1.9

Abstract

Begonia palmata D. Don is one of the most widely distributed and morphologically variable species of Asian Begoniaceae. Examinations of its morphological variation indicate that two of its seven varieties, B. palmata var. difformis and B. palmata var. crassisetulosa, both distributed in the Gaoligong Mountain areas of Yunnan, China are indistinguishable and yet distinct from other varieties. Phylogenetic analyses using ITS DNA sequences further reveals that samples identifiable to these two varieties are also distantly related to samples of typical B. palmata. Based on these observations, we combine and elevate these two varieties to the status of species, Begonia difformis (Irmsch.) W.C. Leong, C.I Peng & K.F Chung, comb. & stat. nov..

Key Words: Begonia palmata var. crassisetulosa, flora of China, ITS, Yunnan

FIGURE 1. Begonia difformis (A, B, E, F) and B. palmata (C, D).
A. Habitat. B. Habit. C. Male and female flowers. D, E. Abaxial surface of staminate flower, note the red-m on tepals of B. difformis (E). F. Pistillate flower.

Scale bars A–C. 4 cm. D–F. 1 cm. || DOI: 10.11646/phytotaxa.227.1.9

Taxonomic treatment

Begonia difformis (Irmsch.) W.C. Leong, C.I Peng & K.F Chung, comb. & stat. nov. (Fig. 1)

Chinese name: 刺毛紅孩兒.

Basionym:— Begonia laciniata Roxb. subsp. diffromis Irmsch. (1939: 531).

Distribution & habitat:— Begonia difformis occurs at the elevation at 1500–3200 m in western and southwestern Yunnan (Fig. 3), commonly found on sandstone rock crevices of the moist environments by streams or on mountain slopes under evergreen broadleaved forests or coniferous forests.

Phenology:—Flowering June–October; Fruiting August–November.

Wai-Chao LEONG, Tao DENG, Hang SUN, Ching-I PENG and Kuo-Fang CHUNG. 2015. Begonia difformis comb. & stat. nov. (Sect. Platycentrum, Begoniaceae), A New Species

segregated from B. palmata D. Don. Phytotaxa. 227(1): 83–91. DOI: 10.11646/phytotaxa.227.1.9

http://mapress.com/phytotaxa/content/2015/f/pt00227p091.pdf