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This species is accepted, and its native range is Tanzania (Usambara Mountains).
A specimen from Kew's Herbarium

[FTEA]

Begoniaceae, Vanessa Plana, Martin J.S. Sands & Henk J. Beentje. Flora of Tropical East Africa. 2006

Type
Type: Tanzania, Lushoto District: Usambara, Amani, Greenway 1045 (K!, holo.; B, EA!, K!, PRE, WAG, iso.) .
Morphology General Habit
Epiphytic herb, erect or reclinate; stems up to 1.5 cm thick, little branched, rooting at the nodes in older stems; indumentum of peltate scales with fimbriate margins.
Morphology Leaves Stipules
Stipules narrowly triangular ± 3.5 cm long, caducous, weakly boat-shaped, curved, apex acuminate, indumentum present on outside, glabrous within.
Morphology Leaves
Leaves thick and fleshy, leathery, asymmetrical, weakly falcate, obliquely ovate to elliptic, 10–15 × 5–8 cm, base weakly cordate to rounded, margin entire, apex obtuse to shortly acuminate, glabrescent above and below, with a few scattered hairs; venation pinnate; petiole 1.5–2.8(–4) cm long.
Morphology Reproductive morphology Inflorescences
Inflorescence axillary, a bisexual dichasial cyme, with up to 11 flowers; peduncle 0.5–1.7 cm long, densely squamose-stellate hairy; each ramification subtended by a pair of opposite weakly boat-shaped elliptic bracts 2–2.5 cm long, chartaceous, with conspicuous veins, apex acuminate, caducous; pedicels (♂ only) 0.5–1.2 cm long; bracteoles absent.
Morphology Reproductive morphology Flowers
Female flowers: tepals 4, free, white, the outer orbicular, 0.4–0.7 cm in diameter, the inner 0.2–0.35 × 0.15–0.2 cm; ovary fusiform, without wings, 4-locular; placentation unknown, probably parietal; styles 4, shortly forked at the apex, glabrous, not persistent in fruit; stigmatic band yellow, horseshoe-shaped, not twisted. Male flowers: tepals 4, free, the outer broadly elliptic, 0.7–1.3 × 0.6–1 cm, the inner obovate, boat-shaped, 0.5–0.7 × 0.3–0.4 cm; stamens 17–19, filaments free or fused at the base; anthers oblong, 1–2 mm long.
Morphology Reproductive morphology Fruits
Fruits sessile, fleshy, fusiform, 4.6–5(–6) cm long, terete in cross section, indehiscent, with a distinct apical scar where tepals and styles have fallen off.
Ecology
Moist forest; ± 900 m.
Conservation
Vulnerable (VU); very rare in its single locality, known only from three specimens .
Distribution
Flora districts: T3 Range: Not known elsewhere

Native to:

Tanzania

Begonia zimmermannii Peter ex Irmsch. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1989 Greenway, P.G. [1045], Tanzania K000242770 holotype
Jan 1, 1989 Greenway, P.G. [1045], Tanzania K000242771

First published in Bot. Jahrb. Syst. 81: 181 (1961)

Accepted by

  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

Literature

Flora of Tropical East Africa

  • E.J. 81: 181 (1961)
  • Wageningen Univ. Papers 2001-2: 242, fig. 30, map 30 (2002).

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0