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Pakistan | Family List | Rubiaceae | Argostemma

Argostemma sarmentosum Wall. in Roxb., Fl. Ind ed. Carey & Wall. 2: 324. 1824. DC., l.c.; Hook. f., Fl. Brit. Ind. 3:42. 1880.


Argostemma sarmentosum

Credit: M. Rafiq

Succulent herb, creeping at the base. Stem 7-15 cm long, slender, softly pubescent, sending out long filiform runners. Leaves opposite decussate, opposite pair unequal, uppermost smaller, ovate elliptic or rounded, entire, obtuse, smaller 1-2 cm and larger up to 10 cm long, puberulous above, villous on nerves beneath; petiole c. 2-3 mm. Inflorescence a terminal umbel or corymbiform raceme, 6-10-flowered., Peduncle 3-6 cm long, fleshy, glabrous; bracts ovate, 3.5-4 mm long. Flowers white, c. 1.5 cm across. Pedicel 8-9 mm long. Hypanthium c. 1.5 mm long, concave, lobes 4, c. 2 mm, ovate, acute, pubescent. Corolla lobes 4, valvate in bud, 7-8 x 2.5-3 mm, lanceolate, acute, greenish at the base; tube very short, throat naked, filaments short, inserted in the throat, c. 2.5 mm, bent downwards, anthers, c. 6 mm long. Disc somewhat thickened. Ovary 2-locular, many-ovuled; style c. 7.5 mm, filiform; stigma fleshy, concave, capitate.

Fl. Per.: August.

Type: Hills at Shukrajiri Rajmuhal, growing on rocks, Wall. Cat. No. 8396. (K-W).

Distribution: Sub-Tropical Himalayas, Garhwal to Bhutan, Khasia Mountains, eastern India and Pakistan (Rawalpindi Dist.).

This species can easily be recognized from the other rubiaceous taxa by its anisophyllous leaves; grows on moist shady rocks.


Related Objects  
  • Illustration (M. Rafiq)
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