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Pakistan | Family List | Rubiaceae | Rubia

7. Rubia tibetica Hook. f., Fl. Brit. Ind. 3: 204. 1881. Bamber, l.c. 151; Ehrend., l.c. 139; Pojark, l.c. 401; Kitam., l.c. 370; Pl. W. Pak. & Afgh. 137. 1964.


Erect perennial herb. Stem and branches short; quadrangular, angles scabrid, nodes of the stem shortly sheathed. Leaves sessile, 2-6 in a whorl, 1.5-2.5 x 0.5-1 cm, ovate suborbicular, lanceolate or elliptic-ovate, acute, lateral nerves obscure, scabrid on margins and nerves beneath. Inflorescence exillary or terminal cymes, shorter than leaves or solitary axillary. Peduncles ± scabrid. Flowers 5-6 mm in diameter; bracts 2, lanceolate; pedicel c. 5 mm long, 4-angled, pubescent. Calyx globose, pubescent. Corolla 3-5 mm long, tube 1 mm long, lobes 5, ovate, lanceolate, acuminate. Stamens 5, filaments c. 1 mm long; anthers reniform, 2-lobed, dorsifixed, 6-7 mm long. Ovary 2-loculed. Styles 2, united at base, 0.5-0.75 mm long; stigma globose.

Fl. Per.: May-August.

Type: Western Tibet, 3-4000 m, Thomson s.n. (CAL) (Deb & Maack, l.c.).

Distribution: Russia (Pamir Alai), Chinese Turkestan (Kashgar), Afghanistan, Pakistan, India, Kashmir and Tibet.


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