Begonia burkillii Dunn, 1920
publication ID |
https://doi.org/ 10.5852/ejt.2018.396 |
DOI |
https://doi.org/10.5281/zenodo.3794337 |
persistent identifier |
https://treatment.plazi.org/id/0397A96F-2F74-FFCA-004E-F95CE3A12B51 |
treatment provided by |
Valdenar |
scientific name |
Begonia burkillii Dunn |
status |
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Begonia burkillii Dunn View in CoL [sect. Sphenanthera ]
Figs 16–18
Bulletin of Miscellaneous Information, Kew 1920: 110 ( Dunn 1920). – Type: India, Arunachal-Pradesh, Janak river, Nov. 1911 – Mar. 1912, Burkill 37139 (lecto-: K000634633, here designated; isolecto-: B n.v.).
Citations in other publications
Burkill (1924: 288), Tebbitt (2003b: 7), Morris (2006: 88), Uddin (2007: 593), Hughes (2008: 22), Morris (2009b: 173), Dash (2010: 32), Saika et al. (2011: 357), Baruah & Choudbury (2014: 41).
Other material
INDIA: Arunachal-Pradesh: Abor Hills, Jauamukh, Nov. 1911 – Mar. 1912, Burkill 37121 ( CAL n.v.); Bapu Mountain, Renging Camp, Nov. 1911 – Mar. 1912, Burkill 36720 ( K); Bapu Mountain, Rotung, Burkill 37706 ( CAL n.v.); Bapu Mountain, Talauma, Nov. 1911 – Mar. 1912, Burkill 36910 (n.v.); Changlang, Namdapha Biosphere Reserve, Anamica Falls, 30 Nov. 2004, Amad Uddin 107934 (ASSAM); Dihang Valley, 12 Feb. 1928, Ward 7822 ( BM, K); Igar Valley, 29 Nov. 1911 – 11 Mar. 1912, Burkill 16121 (n.v.); Janak river, Nov. 1911 – Mar. 1912, Burkill 37455 ( K); Naharlagun, Pal 70320 ( ARUN n.v.); Papum Pare, 3 Apr. 2005, Morris AR2 ( CLEMS n.v.); Pasighat, 10 Feb. 1928, Ward 7822 ( K); Ponging, Nov. 1911 – Mar. 1912, Burkill 37375 (n.v.); Sangram to Panyu River, Dash 32511 ( ARUN n.v.); Serpo stream, Nov. 1911 – Mar. 1912, Burkill 36315 (n.v.); Shile River, Burkill 37121 (n.v.); Subansiri District, 8 Apr. 2005, Morris 12 ( CLEMS n.v.). Assam: Cacchar, Sonapur, 13 Jan. 2011, Himu Roy 143 ( GUBH); Dhemaji, Silapathar, Poba Reserve Forest, 13 Jan. 2010, Ranjit Saika 300 ( GUBH).
Description
Rhizomatous, dioecious herb, 20–40 cm high. Rhizome: ca 10 mm wide, glabrous, internodes 4–6 mm long. Stipules: lanceolate, 5–17 × 2–7 mm, glabrous, persistent. Leaves: petiole 5–15(–25) cm long, glabrous; lamina ovate-lanceolate to ovate, basifixed, base cordate with lobes almost overlapping, (4–)10–20 × (3–) 6–9 cm, asymmetric, upper surface variegated green and brown with a dark centre, glabrous or sparsely puberulent, underside variegated red and green, sparsely puberulent to glabrous, venation palmate-pinnate, midrib (3–) 8–18 cm long; margin entire to shallow dentate, glabrous; apex shortly acuminate. Inflorescence: cymose, axillary, several; peduncle glabrous, branching twice, male primary 5–15 cm, secondary 2–4 cm, 2–6 flowers, female primary 4–6 cm, 1(–2) flowers; bracts lanceolate, 6–20 × 1–5 mm, deciduous. Male flower: pedicel 13–25(–35) mm long, glabrous; tepals 4; outer tepals narrowly ovate, 10–30 × 7–16 mm, white to pink, glabrous, margin entire; inner tepals elliptic-obovate, 10–20 × 3–7 mm, white to pink, glabrous; androecium with 40 –70 stamens, symmetric; filaments 1–3 mm long, unequal, free; anther elliptic-obovate, 2 mm long, dehiscing through slits about half the length of the anther, not hooded, connective extended. Female flower: pedicel glabrous; bracteoles absent; tepals 4, similar to those of the male flower; ovary 4-locular, placentae bifid; capsule rhomboid, with 4 fleshy triangular wings/ridges; styles 4, forked once and twisted twice, deciduous. Fruit: on a stout pedicel, rhomboid; capsule oblong-ellipsoid, 20 × 4–11 mm, puberulous to glabrous, with 4 stubby wings or horns.
Distribution and phenology
Arunachal-Pradesh and Assam; also in Myanmar; 300–1100 m. Flowering: February to March; fruiting: February to April.
Conservation status
Least Concern. Begonia burkillii has an EOO of 83,400 km 2 and an AOO of 72 km 2, with a wide distribution through undisturbed forest in Arunachal-Pradesh and into Northern Myanmar.
Remarks
Specimens from the region lacked female flowers, which are described based on the protologue and photographs of cultivated plants. The leaf markings can vary in colour from red to purple-brown to almost black, but keep the same pattern ( Fig. 17 View Fig ). This species is perhaps most similar to B. handelii in being rhizomatous and having 4-locular fruit, but that species has large rounded outer petals (not narrowly ovate), non-variegated leaves and fruit that is more pyramidal than rhomboid.
The lectotypification by Saikia et al. (2011) list two specimens (Burkill 37706 and 37121) and hence is not valid. Here Burkill 37139 (K) is designated as the lectotype.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Genus |
Begonia burkillii Dunn
Camfield, Rebecca & Hughes, Mark 2018 |
1920: 110 ( Dunn 1920 ) |
Burkill (1924: 288) |
Tebbitt (2003b: 7) , Morris (2006: 88) |
Uddin (2007: 593) |
Hughes (2008: 22) |
Morris (2009b: 173) |
Dash (2010: 32) |
Saika et al. (2011: 357) |
Baruah & Choudbury (2014: 41) |