Lactuca paradoxa

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Lactuca paradoxa

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Description

Scandent herb 1.8-2.1 m high; stems flexuous, divaricately branching, the older ones sometimes with papery bark, glabrous or very sparsely pilose; latex white, copious. Leaves pinnatifid to pinnate, 4-10 cm long, 2-5.5 cm wide; petiole to 4 cm long, narrowly winged, blade with 1-2 pairs of lateral lobes, these cuneate or these and the terminal lobe ovate with a cordate base, dentate margins and acuminate apex, .the very base of the whole leaf auriculate-semi-amplexicaul, the lateral lobes stalked briefly, glabrous or sparsely setose on the veins; leaves near and in inflorescence entire, unlobed, and small. Capitula many in divaricately branched
terminal panicles to 40 cm long; involucre 8-12 mm long; phyllaries reddish or deep purple, ovate to elliptic, 2-13 mm long, obtuse, glabrous except for the very apex which has a small tuft of hairs. Florets 4-5; corolla pale yellow, tube cylindric, 6-7 mm long, pilose distally, ligules 4.5-5 mm long. Achenes pale brown, ellipsoid, hardly flattened, 5-5.5 mm long including the 0.5-1 mm long beak, seemingly glabrous but microscopically puberulous; pappus white, 6-8.5 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: EthiopianativeA,B,C,D,E,F,G,H; KenyanativeA,B,C,D,E,F,I; MalawinativeA,B,F; SudannativeE; TanzanianativeA,B,C,D,E,F; UgandanativeA,B,C,D,E,F; ZairenativeA,B,C,D,F,H,J

Bibliography

A. Beentje H. J. & Jeffrey C. - Cichorieae in Polhill R.M. (ed.), Flora of Tropical East Africa. Compositae 1. 2000
B. Carvalho G. & Gillet H., Catalogue raisonné et commenté des plantes l'Ennedi (Tchad septentrional). 1960
C. Jeffrey C., Notes on Compositae: 1. The Cichorieae In East Tropical Africa in Kew Bull. 18 (3): 427-552. 1966
D. Lawalrée A., Dethier D. & Gilissen E., Flore d'Afrique Centrale (Zaire-Rwanda-Burundi). Spermatophytes, Compositae I. 1986
E. Oliver D. & Hiern W. P. - Compositae in Oliver D., Flora of Tropical Africa 3. 1877
F. Pope G. V., Flora Zambesiaca 6(1). 1992
G. Puff C. & Nemomissa S., Plants of the Simen in Scripta Bot. Belg. 37. 2005
H. Tadesse M. - 16. Scolymus - 29. Tragopogon in Hedberg I. & Edwards S., Flora of Ethiopia and Eritrea. 2004
I. Agnew A. D. Q. & Agnew S., Upland Kenya wild flowers. A flora of the ferns and herbaceous flowering plants of Upland Kenya, ed. 2. 1994
J. Robyns W., Flore des Spermatophytes du Parc National Albert. Sympétales 2. 1947