Tricalysia revoluta Hutch.

Species

Angiosperms > Gentianales > Rubiaceae > Tricalysia

Characteristics

Leaves dimorphic, those at start of new season’s growth smaller, main blades 1.5–5.5(7.2) × 0.8–4 cm, broadly elliptic to rotund or less often elliptic (or ovate or obovate), rounded or obtuse to subacuminate at the apex, the midrib protruding as a minute mucro less than 1 mm long, or sometimes emarginate, obtuse or rounded at the base, margins strongly recurved or conspicuously revolute (to extent that blades are concave/convex) or recurved, coriaceous, shiny and glabrous on upper surface, velvety (or rarely glabrous) and pale beneath; midrib impressed and puberulous above, prominent and velvety beneath; lateral nerves in 3–5 main pairs; tertiary nerves scarcely apparent; domatia present as hairy tufts but not conspicuous; petiole 1–3 mm long, much thicker than midrib, velvety; stipule limbs c. 1 mm long, truncate to triangular, pubescent outside with an arista 1–2 mm long, pubescent.
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Inflorescences borne at naked nodes or subtended by leaves, subsessile, 3–5-flowered; intermediate inflorescence branches occasionally present, but very condensed; single-flowered inflorescence branches 0–1 (or 0–1.5 in fruit) mm long, puberulous; bract and bracteoles cupular, c. 1 mm long, with 2 short lobes, often drying brownish, pubescent.
Corolla white or cream; tube 5.5–7.5 mm long, widening to c. 2 mm at top, glabrous but becoming pubescent towards the top outside; lobes 3.5–4 × 1–1.5(2) mm, acuminate-apiculate, pubescent except for bud-overlap-zone outside, glabrous above.
Calyx tube almost fully hidden by bracteolar cup; limb-tube 0.75–1.75 mm long, cylindrical, sometimes splitting, pubescent outside and inside; lobes to 1(1.5) mm long, narrowly triangular or apiculate.
Shrub or occasionally a small tree, (1) 1.5–5(7) m tall; young stems tan, velutinous; older stems with dark brown flaky bark.
Filaments c. 1 mm long; anthers medifixed, c. 2.5 mm long, mostly exserted but held erect, shortly apiculate, glabrous.
Style 6–8 mm long, glabrous; pollen presenter c. 1–1.5 mm long, shortly exserted; ovules 2–3 per placenta.
Seeds (1) 2–3 per locule, c. 4 mm, across, quarter-spherical, with linear hilar groove.
Fruit red, c. 7 mm in diameter, globose, crowned by persistent calyx limb.
Flowers (4)5(6)-merous, sweet-scented, sessile.
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Foliage retention evergreen
Sexuality hermaphrodite
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Usage

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Cultivation

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Distribution

Tricalysia revoluta world distribution map, present in Zambia

Identifiers

LSID urn:lsid:ipni.org:names:768120-1
WFO ID wfo-0000327367
COL ID 586PS
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Tricalysia revoluta