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

46. Ophiorrhiza napoensis H. S. Lo, Bull. Bot. Res., Harbin. 10(2): 48. 1990.

那坡蛇根草 na po she gen cao

Herbs, ascending, to 30 cm or taller; stems glabrous. Leaves in unequal pairs; petiole 0.3-1.4 cm, glabrous; blade drying papery, grayish adaxially, pale yellow abaxially, narrowly lanceolate to subovate, 5-12 × 1.5-3.5 cm, glabrous on both surfaces or pilosulous along midrib abaxially, base cuneate to obtuse, margins entire, apex acute to acuminate; secondary veins 7-12 pairs; stipules caducous, triangular, 0.5-1 mm, entire or glandular. Inflorescences congested-cymose, several flowered, ferruginous- to golden yellow tomentulose or -pilosulous; peduncle 0.8-1 cm; axes short, helicoid; bracts lanceolate-linear, 10-14 mm, weakly costate, glabrous. Flowers with biology unknown, subsessile or on pedicels to 1.5 mm. Calyx with hypanthium turbinate-rhombic, 1.5-2 × 2.3-2.5 mm, 5-ribbed, densely pilosulous; lobes narrowly triangular, unequal, largest ones 1.8-2 mm, smallest ones 1.3-1.5 mm, glabrous, sinus sometimes with 2 or 3 globose glands. Corolla white, drying orange-yellow, salverform to funnelform, glabrous outside; tube 20-22 mm, glabrous inside; lobes ligulate to ovate, 2.5-5 mm, dorsally ribbed and with very short horn. Immature fruit obcordate. Fl. Oct.

● Forests on hill slopes. Guangxi (Napo), Yunnan (Maguan).


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