Entry From
Flora of Tropical East Africa, page 1, (1976) Author: B. VERDCOURT
Names
PSYCHOTRIA petitii Verdc. [family RUBIACEAE], in K.B. 30: 249 (1975). Type: Kenya, Teita Hills, Ngangao, 8 km. NNE. of Ngerenyi, Drummond & Hemsley 4343 (K, holo.!, EA, iso.)
Information
Shrub or small tree 3–9 m. tall, with glabrous branches save for tufts of ferruginous hairs within the stipules, visible after they have fallen; petiole-bases leaving conspicuous raised round scars, at least in the dried material. Leaf-blades elliptic to oblong-elliptic, 4.5–13.5 cm. long, 2.2–5 cm. wide, mostly shortly acuminate at the apex, cuneate at the base, glabrous on both surfaces, without nodules or domatia; petiole 0.8–3 cm. long; stipules ovate-elliptic, 7–10 mm. long, 5–7 mm. wide, entire, distinctly or obscurely ciliate with short hairs, soon deciduous. Flowers? heterostylous, 5-merous, in branched panicles, each component rather dense, ± 1 cm. long; peduncle 6 cm. long; secondary branches 0.5–1.2 cm. long; bracts ± triangular, distinctly ciliate. Calyx-tube subglobose, 1 mm. long, glabrous; limb 1 mm. long; lobes oblong or triangular, 0.6–1 mm. long, ciliate; disc prominent. Corolla white; tube 4 mm. long; lobes ovate-elliptic, 2 mm. long, 1.2 mm. wide, acuminate. Stamens with filaments 1 mm. long in short-styled flowers. Style 1.2 mm. long in short-styled flowers; stigma-lobes ellipsoid, 0.4 mm. long. Drupes globose, 1.6 cm. in diameter, smooth in fresh state, ± grooved in the dry state, when dry with a ring of lacunae between ridges of pyrenes and the outer wall; pyrenes 5–6 mm. thick, shiny and grooved within, with ± 15 wing-like ridges. Seeds dark purplish brown, semi-ellipsoid or almost circular, 9–13 mm. long, 7–11 mm. wide, 3.5–4 mm. thick, ventrally flattened, dorsally ± 5-ribbed, deeply ruminate on both surfaces.
Distribution
KENYA Teita District Ngangao Hill, July 1937, Dale in F.D. 3815! & same locality, 6 Feb. 1953, Bally 8751! & Mbololo Hill, Mraru Ridge, 18 Oct. 1970, Faden & Githui 70/739!
Notes
R. B. & A. J. Faden 72/256 (Kenya, Teita Hills, Vuria Hill, 8 May 1972) has been named P. sp. off. cyathicalyx but the calyx is not of the correct shape. The dried fruits are black, 6 mm. in diameter and grooved strongly; they appear mature but I think are juvenile and that the specimen actually belongs to the above species. The stems and foliage, etc. agree well.