Lactuca attenuata

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Lactuca attenuata

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Common names

(Central Africa): NyabahimaA; Kinyarwanda (Central Africa): AkaramataB, KamamataB, NyabahimaB, RuriraB, UruvunangaB; Mashi (Nigeria) (Central Africa): LuvunangaB

Description

Herb, perennial, climbing, 30-300 cm high. Flowering stems terete, glabrous, glabrescent or hispid, 5.0-12.0 mm in diameter. Cauline leaves narrowly ovate or elliptic, 6.0-17.0 cm long, 0.8-2.5-(3.0) cm wide, entire or runcinate, often ciliate, subentire or remotely dentate, acuminate, petiole-like attenuate with a winged petiole or sometimes auriculate, glabrous or sometimes hispid; terminal lobe triangular; lateral lobes 2-6, retrorse. Synflorescence paniculiform, with many heads. Peduncle up to 3.0 cm long, covered with bracts. Heads with 3-5 flowers. Involucre at flowering cylindrical, 8.0-15.0 mm long, at flowering c. 2.0 mm in diameter; involucral bracts 2.5-14.0 mm long, acute to obtuse, green or black, often tinged purple, sometimes hispid or glabrous, minutely ciliate at apex; outer involucral bracts ovate; inner involucral bracts linear. Corolla ligulate, 13.0-14.0 mm long, yellow or rarely purple; tube c. 5.0 mm long, pubescent at apex; ligule 7.0-8.0 mm long, 3.0-3.5 mm wide, often tinged purple on outer face. Achenes fusiform in outline, somewhat compressed, 3.5-5.5 mm long, 1.5 mm wide, hispidulous or glabrous, pale brown, ribbed, with a filiform beak; beak c. 1.0 mm long. Pappus barbellate, white, 6.5-7.5 mm long.

Based on: Jeffrey, C. & Beentje, H. J. 2000: Cichorieae. – Pp. 63-108 in: Beentje, H. J. & Smith, S. A. L. (ed.), Flora of Tropical East Africa. Compositae (Part 1). – Kew; Pope, G. V. 1992: Flora Zambesiaca 6, part 1. – London.

Distribution

Africa: BurundinativeA,B,C,D,E; MalawinativeD,E; RwandanativeA,B,C,D,E,F; UgandanativeA,B,C,D,E,F; ZairenativeA,B,C,D,E,F,G,H

Bibliography

A. Lawalrée A. - 56. Tolpis - 61. Crepis in Troupin G., Flore du Rwanda. Spermatophytes 3. 1985
B. Lawalrée A., Dethier D. & Gilissen E., Flore d'Afrique Centrale (Zaire-Rwanda-Burundi). Spermatophytes, Compositae I. 1986
C. Beentje H. J. & Jeffrey C. - Cichorieae in Polhill R.M. (ed.), Flora of Tropical East Africa. Compositae 1. 2000
D. Pope G. V., Flora Zambesiaca 6(1). 1992
E. Strugnell A. M., A checklist of the Spermatophytes of Mt. Mulanje, malawi in Scripta Bot. Belg. 34. 2006
F. Robyns W., Flore des Spermatophytes du Parc National Albert. Sympétales 2. 1947 (as Lactuca semibarbata Stebbins)
G. Jeffrey C., Notes on Compositae: 1. The Cichorieae In East Tropical Africa in Kew Bull. 18 (3): 427-552. 1966
H. Robyns W., Flore des Spermatophytes du Parc National Albert. Sympétales 2. 1947 (as Lactuca attenuatissima Robyns)