Lactuca songeensis

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Lactuca songeensis

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Description

Perennial herb, the stem 40-80 cm high, bearing both leaves .and capitula, glabrous, green with a few purple streaks; root tuberous, like a carrot. Basal leaves unknown, cauline leaves 2-4, sometimes absent, sessile, lanceolate, (3-)5-10 cm long, (0.5-)1-2.2 cm wide, half-amplexicaul, margins sinuate-denticulate, apex acute or acuminate, glabrous; midrib sometimes purple. Capitula ± 20, in lax panicles; involucre cylindric, 11-15 mm long; phyllaries green with purple marks, ovate to lanceolate, 2-12 mm long, glabrous but for the very apex. Corolla white, the ligules tinged mauve beneath, tube cylindrical, ± 3 mm long, ligule 10-11 mm long, 3 mm wide. Achenes flattened, ellipsoid, 3-ribbed on each side, 6.5-7 mm long, hardly beaked, minutely puberulous; pappus white, 7-9.5 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: TanzanianativeA,B

Bibliography

A. Beentje H. J. & Jeffrey C. - Cichorieae in Polhill R.M. (ed.), Flora of Tropical East Africa. Compositae 1. 2000
B. Jeffrey C., Notes on Compositae: 1. The Cichorieae In East Tropical Africa in Kew Bull. 18 (3): 427-552. 1966