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

58. Ophiorrhiza rhodoneura H. S. Lo, Bull. Bot. Res., Harbin. 10(2): 45. 1990.

红脉蛇根草 hong mai she gen cao

Herbs, ascending, to 50 cm tall; stems subterete, rather stout, densely ferruginous villous with multicellular trichomes. Leaves in somewhat unequal pairs; petiole 1-4 cm, densely villous; blade drying subleathery-papery, with veins ferruginous-red abaxially, ovate or elliptic, 5.5-12 × 2.5-6 cm, glabrous adaxially, villous on principal veins abaxially, base subrounded, apex acute; secondary veins 9-13 pairs; stipules caducous, not seen. Inflorescence congested-cymose and rather umbelliform to subcapitate, many flowered, densely villous; peduncles 3-3.5 cm; axes short, helicoid; bracts linear-spatulate, 10-13(-15) mm. Flowers reportedly distylous, subsessile. Calyx densely villosulous; hypanthium compressed turbinate; limb reduced, denticulate. Corolla funnelform, outside ± pubescent; tube 24-27 mm, inside villous below middle; lobes subovate, 6-8 mm, pinnately veined, dorsally with narrow ciliate wing, apex rostrate. Capsules obcordate-mitriform, ca. 4.5 × 8-10 mm, villosulous. Fl. Sep, fr. Nov.

● Broad-leaved forests; ca. 1300 m. Guangxi (Napo).

In the protologue and FRPS (71(1): 148. 1999), H. S. Lo noted that this species is distylous but described only putative short-styled flowers, with the stigmas borne near the base of the corolla tube and the anthers positioned just below the corolla throat.


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