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1. Pentatropis spiralis (Forssk.) Decne. in Ann. Sci. Nat. Ser. 2 (9): 327. t. 11. 1838. Boiss., Fl. Or. 4:58. 1879; Parker, For. Fl. Punj. ed. 3.341. 1956; Tackholm, Stud, Fl. Egypt ed. 2:413. 1974.
Vern.: Ambevel.
S.I. ALI
Asclepias spiralis Forssk.Pentatropis cynanchoides R. Br.
Roots tuberous. Old branches with rough corky bark. Leaves 1.2-3.8 x 6-18 cm, linear, oblong, ovate or elliptic, acute or obtuse, mucronate, fleshy. Petiole 2.5-13 mm long. Peduncle up to 5 mm long. Pedicel 5-12.5 mm long, bracts minute. Calyx lobes c. 1.5 mm long. Corolla lobes 8-13 mm long, glabrous outside, minutely puberulous inside. Corona lobes c. 1.5 mm long. Follicles 5-7.5 cm x 8 mm. Seeds c. 4.5 mm long, ovate, flattened, minutely irregularly crenate at the lower end, coma 1.8-2.5 cm long.
Fl. Per.: February.
Type: [N. Yemen] Arabia felix, Ad viam inter Djaliae et Meneisa, Forsskal (C).
Distribution: Pakistan, India, Afghanistan, Iran, Arabia and Tropical Africa.
The flowers are used medicinally and the tubers are reportedly, eaten.
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