Oxyanthus zanguebaricus (Hiern) Bridson

Species

Angiosperms > Gentianales > Rubiaceae > Oxyanthus

Characteristics

Shrub or small tree 1.5–8.5 m. tall; young branchlets somewhat grooved, glabrous or less often glabrescent.. Leaf-blades elliptic to narrowly ovate, 5.4–15.5 cm. long, 2.1–6 cm. wide, acute to shortly acuminate at apex, obtuse to rounded or occasionally acute at base, glabrous above and beneath or sometimes sparsely pubescent or pubescent beneath, thinly coriaceous, midrib straw-coloured when dry, raised above, tertiary nerves finely reticulate, raised above, obscure beneath; domatia absent or inconspicuous; petiole 3–6 mm. long, the margins and midrib raised above, glabrous or covered with short stiff hairs; stipules triangular at base, acuminate at apex, 0.7–1.1 cm. long, 4–6 mm. wide at base, glabrous or rarely glabrescent outside.. Inflorescence (3–)5–11-flowered, forming compact narrowly pyramidal panicles occasionally at the top node, but usually at the next 1–5 nodes down; peduncles obscured by the stipules, up to 4 mm. long, the pedicels up to 5 mm. long; bracts and bracteoles lanceolate or linear-lanceolate, 0.7–1(–1.2) cm. long.. Calyx glabrous; tube 2.5–3 mm. long; limb-tube ± 2 mm. long, ± as wide as the tube; lobes linear-subulate, (4–)5–8 mm. long.. Corolla-tube (7.2–)9.7–11.4 cm. long, ± 2 mm. wide; lobes oblong-lanceolate, 1–2.2 cm. long, 3–5 mm. wide, acuminate.. Anthers partly exserted, apiculate.. Stigmatic club oblong-ellipsoid, 2–2.5 mm. long, obtuse at apex.. Fruit pale brown when dry, flecked with white, pear-shaped, 3.5–5.3 cm. long, 2.4–3.2 cm. wide; calyx-limb eventually deciduous.. Seeds blackish brown, 6 mm. long, strongly striated.
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Leaf blades 5.4–15.5 × 2–6 cm, elliptic to narrowly ovate, acute to shortly acuminate at apex, obtuse to rounded or occasionally acute at base, glabrous above and beneath or sometimes sparsely pubescent or pubescent beneath, subcoriaceous, shiny above; midrib straw-coloured when dry, crested above, prominent beneath; lateral nerves in 8–9 main pairs; tertiary nerves reticulate, raised above, obscure or apparent beneath; domatia absent or inconspicuous; petiole 3–6 mm long, the margins and midrib raised above, glabrous or covered with short stiff hairs; stipules triangular at base, acuminate at apex, 7–11 mm long, 4–6 mm wide at base, glabrous or rarely glabrescent outside, mid-nerve apparent.
Inflorescence occasionally borne at the top node, but usually at the next 1–5 nodes down, (3)5–11-flowered, forming compact narrowly pyramidal panicles; peduncles up to 4 mm long, obscured by the stipules; pedicels up to 5 mm long; bracts/bracteoles 7–10(12) mm long, lanceolate or linear-lanceolate, usually subulate above.
Fruit pale brown when dry, green when fresh, flecked with white, 3.5–5.3 × 2.4–3.2 cm, ob-pyriform; calyx limb eventually deciduous.
Calyx glabrous; tube 2.5–3 mm long; limb-tube c. 2 mm long, ± as wide as the tube; lobes (4)5–8 mm long, linear-subulate.
Shrub or small tree 1.5–8.5 m tall; young branchlets somewhat grooved, glabrous or less often glabrescent.
Corolla tube (7.2)9.7–11.4 cm long and c. 2 mm wide; lobes 1–2.2 × 3–5 mm, oblong-lanceolate, acuminate.
Anthers partly exserted, apiculate at apex, scarcely hastate at base.
Pollen presenter 2–2.5 mm long, oblong-ellipsoid, obtuse at apex.
Seeds blackish-brown, 6 mm long, strongly striated.
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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 - 8.5
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Environment

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Hardiness (USDA) 9-12

Usage

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Cultivation

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Distribution

Oxyanthus zanguebaricus world distribution map, present in Kenya, Mozambique, Somalia, and Tanzania, United Republic of

Conservation status

Oxyanthus zanguebaricus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:758830-1
WFO ID wfo-0000261855
COL ID 4BCFN
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Oxyanthus zanguebaricus Randia scabra Gardenia zanguebarica