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FOC | Family List | FOC Vol. 19 | Rubiaceae | Ophiorrhiza

19. Ophiorrhiza gracilis Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 41: 311. 1872.

纤弱蛇根草 xian ruo she gen cao

Herbs, weak at base, suberect above, to 30 cm tall; stems glabrous. Petiole glabrous; leaf blade drying membranous-papery, grayish on both surfaces, paler abaxially, lanceolate or subovate, 6-12(-17) × 2-4.5 cm, glabrous on both surfaces, base cuneate to attenuate and usually oblique, apex caudate to long acuminate; secondary veins 8-12 pairs; stipules caducous, not seen. Inflorescences many flowered, puberulent; peduncle 2-3 cm; bracteoles subulate, 0.5-1.2 mm, early caducous. Flowers distylous, subsessile. Calyx with hypanthium turbinate, ca. 1.3 mm, 5-ribbed; lobes ovate-triangular, 0.4-0.5 mm. Corolla white or reddish at apex, tubular; tube ca. 10.5 mm, white villous in throat and at middle inside; lobes triangular-ovate, 1.2-1.3 mm, dorsally with horn 0.8-1 mm. Capsules not seen. Fl. spring.

Dense forests. Yunnan [Myanmar].

H. S. Lo (in FRPS 71(1): 171. 1999) described the anthers as situated near the base of the corolla tube and the stigmas positioned just below the throat in the long-styled form vs. the anthers situated above the middle of the corolla tube and the stigmas near the base in the short-styled form.


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