Tribulus rajasthanensis Bhandari & Sharma in Bot. Notis. 129: 367. f.1. 1977.

Herbs, annual or perennial, prostrate to procumbent herbs; branches up to 50 cm long, hirsute. Leaves 2 - 5 cm long; leaflets 8 - 14, oblique, elliptic-oblong to ovate-oblong, 4 - 12 x 3 - 6 mm, pubescent above, villous beneath; stipules 5 - 7 x 1 - 2 mm. Flowers yellow, 10 - 15 mm across; pedicels 10 - 20 mm long. Sepals linear-lanceolate, acute, 5 - 7 x 1 - 2 mm, villous outside, pubescent inside. Petals obovate-cuneate, 5 - 7.5 x 3 - 5 mm. Stamens 10, ca 3.5 mm long; intrastaminal glands broadly triangular, free; extrastaminal gands round, truncate or emarginate; anthers oblong. Ovary ca 2 mm across; style ca 1 mm long; stigma 5-rayed. Mericarps 6 - 7 x 4 - 5 mm, densely hispid; major spines 2, ca 5 mm long, divergent; minor spines, 20 - 30, unequal, 2 - 3 mm long.

Fl. & Fr. July - Nov.

Distrib. India: Rajasthan and Gujarat.

Pakistan.

Chromosome no. n = 6 (Bhandari & Sharma l.c.).

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