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

48. Ophiorrhiza ochroleuca J. D Hooker, Fl. Brit. India. 3: 78. 1880.

黄花蛇根草 huang hua she gen cao

Herbs, annual or perennial, or subshrubs, erect, to 40[-100] cm tall; stems [glabrous to] pubescent. Leaves in subequal pairs; petiole 1-4.5 cm, subglabrous; blade drying thinly papery, adaxially pale green, abaxially paler, elliptic to lanceolate, [3.5-]13-15[-22.5] × [1.5-]4.5-6[-10] cm, subglabrous except pilosulous abaxially along principal veins, base cuneate to obtuse, margins entire, apex shortly acuminate to subacute; secondary veins [8-]10-12[-15] pairs; stipules deciduous, subovate or triangular, [4-]5[-15] mm, at apex with 1 gland. Inflorescence cymose, many flowered, branched to several orders, pilosulous; peduncle ca. 3[-10] cm; axes helicoid, 1-3[-10] cm; bracts minute, caducous. Flowers subsessile or on pedicels to 3 mm. Calyx puberulent to pilosulous; hypanthium subturbinate, ca. 3 mm, 5-ribbed; lobes triangular, ca. 0.5 mm. Corolla yellow to pale yellow, tubular, outside glabrous and 5-ribbed in upper part; tube 5.5-6.5[-12] mm, glabrous inside; lobes ca. 1 mm. Capsules mitriform, ca. 3 × [5-]7.5 mm, puberulent to glabrescent.

Wet places in forests; 300-2000 m. Yunnan [Bhutan, NE India, Myanmar].

Measurements included in brackets are from the description of this species by Deb and Mondal (Bull. Bot. Surv. India 39(1-4): 84-86. 1997). Their description conflicts with that of the Fl. Bhutan (2(2): 777. 1999), which distinguished this species by its leaves glabrous below while Deb and Mondal considered the pubescent lower leaf veins distinctive.


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