Lactuca schweinfurthii

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Lactuca schweinfurthii

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Common names

Luba-Katanga (Central Africa): KibumbangangaA; Nilo-Saharan (Other) (Central Africa): EkukugbuA

Description

Perennial herb with erect stems 1.4-2.4 m high; taproot fleshy or semi-woody; stems solitary or in pairs, often purplish proximally, ribbed, sparsely glandular-setose with purple setae. Leaves all cauline, lanceolate, 4-24 cm long, 1-4.5 cm wide, base cuneate to rounded or semi-amplexicaul, margins sinuate-dentate, apex acute, sparsely setose to subglabrous. Capitula many, in lax panicle to 40 cm long; involucre cylindric to narrowly campanulate, 6-10.5 mm long; phyllaries often purplish, ovate to lanceolate, 3-10 mm long, glabrous except for the ciliate margins in the outermost and the ciliate-lobed apices. Florets ± 5 per capitulum; corolla yellow, tube cylindric, 2-2.5 mm long, ligule erect, 4-5.5 mm long. Achenes orange to dark brown, flattened ellipsoid, 4-4.5 mm long, not or hardly beaked, 1(-2)-ribbed on each side, minutely puberulous; pappus white, 3-5.5 mm long.

from: 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.

Distribution

Africa: AngolanativeA,B,C,D,E,F; BurundinativeA,C,G; CameroonnativeA,B,C,E,F; MalawinativeC; NigerianativeB; RwandanativeG; SudannativeA,B,C,E,F,G,H,I; TanzanianativeA,B,C,E,F; ZairenativeA,B,C,F,G; ZambianativeA,C,E,F

Bibliography

A. Lawalrée A., Dethier D. & Gilissen E., Flore d'Afrique Centrale (Zaire-Rwanda-Burundi). Spermatophytes, Compositae I. 1986
B. Adams C. D. - Tribe XIII Cichorieae in Hutchinson J. & Dalziel J. M. (ed.), Flora of West Tropical Africa, ed. 2, 2. 292-297
C. Beentje H. J. & Jeffrey C. - Cichorieae in Polhill R.M. (ed.), Flora of Tropical East Africa. Compositae 1. 2000
D. Figueiredo E. & Smith G. F., Plants of Angola in Strelitzia 22. 2008
E. Jeffrey C., Notes on Compositae: 1. The Cichorieae In East Tropical Africa in Kew Bull. 18 (3): 427-552. 1966
F. Pope G. V., Flora Zambesiaca 6(1). 1992
G. Robyns W., Flore des Spermatophytes du Parc National Albert. Sympétales 2. 1947
H. Darbyshire I. & al., The plants of Sudan and South Sudan. An annotated checklist. 2015
I. Oliver D. & Hiern W. P. - Compositae in Oliver D., Flora of Tropical Africa 3. 1877