Begonia scintillans Dunn (Dunn 1920
Creators
Description
Begonia scintillans Dunn [sect. Diploclinium]
Figs 54 –55
Bulletin of Miscellaneous Information, Kew 1920: 111 (Dunn 1920). – Type: India, Arunachal-Pradesh, Bapu Mountain, Rotung, Nov. 1911 – Mar. 1912, Burkill s.n. (lecto-: K000761475, here designated).
Citations in other publicationsBurkill (1924: 289), Uddin (2007: 595), Dash (2010: 39).
Other materialINDIA: Arunachal-Pradesh: Bapu Mountain, Nov. 1911 – Mar. 1912, Burkill 36928 (K 000634618); Bapu Mountain, Ripshing Sieng, Nov. 1911 – Mar. 1912, Burkill 36543 (n.v.); Bapu Mountain, Rotung, Nov. 1911 – Mar. 1912, Burkill 36219 (n.v.); Bapu Mountain, Rotung-Ripshing Sienge Ridge, Nov.
1911– Mar. 1912, Burkill 36820 (n.v.); Palin to Deed, Pal 513 (ARUN n.v.). Meghalaya: Sillet Hills, De Silva s.n., Wallich Cat. No. 3679 p.p. (K-W, barcode K 000761430).
DescriptionRhizomatous, creeping, monoecious herb, 7–15 cm high. Rhizome: 4–6 mm wide, red villose, internodes 3–5 cm long. Stipules: lanceolate, 6–11 × 4–6 mm, villose on reverse, persistent. Leaves: petiole 4–11 cm long, densely red villose; lamina ovate-orbicular, basifixed, base cordate with lobes not overlapping, 4.5–10 × 3.5–7 cm, asymmetric, upper surface dark green with small silver spots, densely pale strigose all over, underside red, red tomentose all over, denser on the veins, venation palmate, midrib 3–5.5 cm long; margin with minute serration, with dense red hairs; apex acuminate to acute. Inflorescence: axillary, few; peduncle red villose, branching 1–2 times, primary 3–7 cm, secondary 5–10 mm, with 1 female and 1– 2 male flowers; bracts ovate, 7–9 × 4–6 mm, pilose, margin pilose, persistent. Male flower: pedicel 20–30 mm long, red villose; tepals 4; outer tepals broad ovate, 15– 20 × 13–16 mm, coral pink, pilose on reverse, margin entire; inner tepals obovate, 10–16 × 10 –14 mm, coral pink, glabrous; androecium with 30–40 stamens, symmetric; filaments 2 mm long, fused into column; anther obovate, 1 mm long, dehiscing through slits along the length of anther, not hooded, connective retuse. Female flower: pedicel 7–10 mm long, red villose; bracteoles absent; tepals 4–5, obovate, 10–11 × 7–9 mm, coral pink, pilose on reverse, margin entire; ovary capsule obovoid, 9 × 5–6 mm, red villose, with one long triangular wing and two short crescent shaped wings; styles 3, deeply forked once and twisted once. Fruit: pendulous; capsule obovoid, 8–10 × 4–6 mm, red villose; wings extending slightly along the pedicel; longest wing rounded oblong 5 × 4–6 mm; shortest wings crescent shaped, 1–3 × 8–10 mm.
Distribution and phenologyArunachal-Pradesh and Meghalaya; 500–2000 m. Flowering and fruiting: February to March.
Conservation status Least Concern. Begonia scintillans has an AOO of 24 km 2 and an EOO of 20,378 km 2 suggesting a
status of near threatened. However, this species is probably under-collected and is likely to have a wider distribution in the surrounding extensive undisturbed forests of Arunachal-Pradesh, the Sillet Hills and further afield. The species has been found near the Moulling National Park.
RemarksThis species was previously known only from the original material but one other specimen from the Sillet Hills has been located (De Silva s.n.). The fruit measurements were based on immature fruits as no mature fruits were present on the specimens. Begonia scintillans has a distinctive inflorescence, with a pair of male and female flowers often subtended by a single male flower (Fig. 55).
Begonia scintillans is allied to B. thomsonii, which has a dense red indumentum all over; B. scintillans has a red indumentum on much of the plant, but white hairs on the upper leaf surface. Begonia thomsonii differs further in having more flowers per inflorescence, with the inflorescences being unisexual as far as can be observed from the available material. The habit also differs: B. scintillans has an elongate, creeping rhizome with the leaves evenly spaced; B. thomsonii has the leaves arising from a short rhizome, appearing fasciculate.The specimen from Meghalaya (De Silva s.n., Wallich Cat. No. 3679) is on a mixed sheet, and hence the locality should be treated with caution.
Begonia shilendrae Rekha Morris & P.D.McMillan [sect. Platycentrum] Fig. 56; Table 1
The Begonian 79 (3–4): 63 (Morris & McMillan 2012). – Type: India, Arunachal-Pradesh, Itanagar, 3 Apr. 2005, Morris AR1 (holo-: CLEMS).
Other materialINDIA: Arunachal-Pradesh: Itanagar, 3 Apr. 2005, Morris AR-1A (CLEMS); ibid., 3 Apr. 2005, Morris AR-1B (CLEMS); ibid., 3 Apr. 2005, Morris AR-1C (CLEMS); ibid., 17 Dec. 2005, Morris AR108 (CLEMS n.v.); ibid., 17 Dec. 2005, Morris AR109 (CLEMS n.v.); ibid., 17 Dec. 2005, Morris AR110 (CLEMS n.v.); ibid., 17 Dec. 2005, Morris AR111 (CLEMS n.v.).
DescriptionRhizomatous, monoecious herb, 20–50 cm high. Rhizome: 10–20 mm wide, glabrous, internodes 5–25 mm long. Stipules: unseen. Leaves: petiole up to 40 cm, densely to sparsely villose; lamina broadly ovate, basifixed, base shallowly cordate to truncate, 18–35 × 8–30 cm, slightly asymmetric, upper surface matt green, glabrous, underside green, pubescent on veins near petiole, venation palmate; margin very deeply lobed, with 5–7 lobes, entire, glabrous; apex acuminate. Inflorescence: panicle or raceme of cymes, terminal, few; peduncle glabrous with hairs near base, branching 1–3 times, primary 10–30 cm long, secondary and tertiary ca 1 cm, up to 15 flowers; bracts unseen. Male flower: pedicel 5–15 mm long, glabrous; tepals 2; outer tepals cordate-ovate, 5–10 × 4–6 mm, rose pink to pale pink, glabrous, margin entire; androecium with 30–40 stamens, symmetric; filaments 1–3 mm long; fused at base; anther globose, 1 mm long, not hooded, connective not extended. Female flower: pedicel 10– 35 mm long, glabrous; bracteoles absent; tepals 2, ovate, 5–10 × 4–9 mm, rose pink to pale pink, glabrous, margin entire; ovary 2(–3)-locular, placentae bifid; capsule oblong-elliptic, with one long oblong wing and two very small oblong wings; styles 2–3, forked once and twisted once, persistent. Fruit: recurved; capsule elliptic, 9–13 × 3–5 mm, glabrous; wings extending along the pedicel and in front of capsule, unequal; longest wing rounded triangle, 15–20 × 10–14 mm; shortest wings oblong, 1–2 × 11–17 mm.
Distribution and phenologyEndemic to Arunachal-Pradesh; ca 450 m. Flowering: December to January; fruiting: December to February.
Conservation statusData Deficient. Begonia shilendrae is only known from the type location in the lower mountains of Arunachal-Pradesh.
RemarksThe description is based on the protologue and photographs of the type; the notes therein describe the species as protandrous. This species is vegetatively similar to B. sikkimensis and B. koelzii in terms of having lacerate leaves; see notes under those species.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Begoniaceae
- Genus
- Begonia
- Kingdom
- Plantae
- Order
- Cucurbitales
- Phylum
- Tracheophyta
- Scientific name authorship
- Dunn (Dunn
- Species
- scintillans
- Taxon rank
- species
- Taxonomic concept label
- Begonia scintillans (Dunn, 1920 sec. Camfield & Hughes, 2018
References
- Dunn S. T. 1920. Decades Kewensis: Plantarum Novarum in Herbario Horti Regii Conservatarum. Decas XCVI. Bulletin of Miscellaneous Information, Kew 1920: 108 - 111. Available from http: // biodiversitylibrary. org / page / 11269649 [accessed May 2009].
- Burkill I. H. 1924. Botany of the Abor Expedition. Records of the Botanical Survey of India 10: 1 - 420.
- Uddin A. 2007. Distribution and status of India Begonia species. Journal of Economic and Taxonomic Botany 31 (3): 591 - 597.
- Dash S. S. 2010. Native species of Begonia L. (Begoniaceae) in Arunachal-Pradesh-diversity and distribution. Bulletin of Arunachal Forest Research 26: 29 - 43.
- Morris R. & McMillan P. D. 2012. Begonia shilendrii R. Morris & P. D. McMillan: A new species from Arunachal Pradesh, India. The Begonian 79 (3 - 4): 60 - 64.