Rinorea welwitschii Kuntze

Species

Angiosperms > Malpighiales > Violaceae > Rinorea

Characteristics

Shrub or small tree to 10 m. tall; branches densely to sparsely pubescent when young, eventually glabrescent, hairs generally rather bristly.. Leaf-lamina obovate to oblanceolate, (5.5–)7–18(–21.5) cm. long, (1.5–)2.5–7(–10) cm. wide, the base ± cuneate, the apex abruptly acuminate, gland-dotted beneath, glabrous above, sparsely to densely pubescent beneath; margin crenate-serrate to serrate-spinulose, the spines short, up to 0.5 mm. long; lateral veins 7–12 pairs; petiole 0.5–3 cm. long, bristly pubescent.. Inflorescence a slender terminal thyrse; rachis 4–12 cm. long, sparsely to densely pubescent; flowers yellow, ± pendulous; bracts and bracteoles lanceolate-triangular, 2–3 mm. long; peduncle (2–)6–13 mm. long, sparsely to densely pubescent; pedicels 1.5–4 mm. long, pubescent.. Sepals ovate, 2–3.5 mm. long, puberulous to densely bristly pubescent, margin ciliate.. Petals oblong, 4–5 mm. long, thick, obtuse, slightly recurved at the apex, glabrous to moderately pubescent outside.. Stamens 2.8–3.2 mm. long; filaments fused into a tube for most of their length, with a free lobed margin; connective-appendage oblong to lanceolate, decurrent, almost 1.5 times the length of the anthers; thecal appendage short, entire or bilobed.. Ovary glabrous to densely pubescent; style 2.5–3 mm. long.. Capsule 3-lobed, 10–17 mm. long, smooth, coriaceous, glabrous or pubescent.
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Leaves petiolate; lamina (6) 8.5–15 (19) x 3–7 cm., obovate to oblanceolate, abruptly acuminate at the apex, cuneate at the base, ± bluntly serrate, sometimes almost entire near the base, coriaceous, glabrous above, the main veins pubescent below, with venation prominent on both surfaces and sessile brown glands on the lower one; petiole 5–20 (30) mm. long, channelled above, pubescent; stipules c. 6–8 mm. long, subulate, pubescent, soon caducous.
Stamen-tube with free margin produced to form narrow lobes behind at least some of the anthers in each flower, glabrous; anthers ± sessile, ovoid, pubescent or glabrous, with an ovate-obtuse, decurrent connective-appendage, and entire, bifid or paired thecal appendages.
Inflorescence compound, terminal, narrowly paniculate to triangular, with few-flowered cymose clusters at the ends of short lateral branches; peduncle stout, flattened, vertically ribbed, shortly brown-pilose.
Petals 3–4 mm. long, 11/2–2 times as long as the sepals, yellow, thick, oblong, obtuse, recurved above, slightly unequal, sparsely pubescent or almost glabrous.
Capsule 10–13 mm. long, dark red-brown, ± erect, 3-lobed, pubescent, ± smooth, coriaceous, several-seeded.
Branches terete, longitudinally ribbed and ± densely brownish-pubescent when young, eventually ± glabrous.
Sepals c. 2 mm. long, ovate-elliptic, obtuse, not ribbed, pubescent or shortly pilose.
Ovary ± globose, densely pilose; style 11/2–2 times as long as the ovary.
Flowers ± pendulous, shortly pedicellate; pedicels shortly pilose.
Bracts triangular to lanceolate, shortly brown-pilose, persistent.
Shrub or small tree, 1.5–9 m. high; bark smooth, grey-brown.
Flower-buds ovoid or cylindric, pendulous.
Seeds c. 4–5 mm. long.
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Growth form tree
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Foliage retention deciduous
Sexuality hermaphrodite
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Mature height (meter) 1.5 - 9.14
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Photosynthetic pathway c3

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Hardiness (USDA) 9-12

Usage

Uses medicinal
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Cultivation

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Distribution

Rinorea welwitschii world distribution map, present in Angola, Central African Republic, Côte d'Ivoire, Cameroon, Congo, Gabon, Ghana, Equatorial Guinea, Liberia, Nigeria, Sierra Leone, and Zambia

Conservation status

Rinorea welwitschii threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:867433-1
WFO ID wfo-0000464518
COL ID 4T4H7
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Rinorea elliotii Rinorea banguensis Rinorea variifolia Rinorea welwitschii Alsodeia welwitschii Rinorea glaucophylla Rinorea dupuisii Rinorea thonneri Rinorea mongalaensis Rinorea punctata Alsodeia dupuisii Rinorea welwitschii subsp. welwitschii Rinorea kerkhoveni

Lower taxons

Rinorea welwitschii subsp. tanzanica