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

3. Argostemma saxatile Chun & F. C. How ex W. C. Ko, Fl. Hainan. 3: 578. 1974.

岩雪花 yan xue hua

Herbs, 5-15 cm tall, unbranched or sometimes few branched; stems prostrate and rooting near base, ascending at apex, villous. Leaves opposite, markedly anisophyllous, in larger of a pair petiole 3-5 mm, pilose; blade drying thinly papery and pale abaxially, oblong-elliptic or ovate, 15-55 × 8-18 mm, adaxially sparsely strigose at least along midrib and margin, abaxially strigose at least along veins, base cuneate to obtuse, apex acute or rarely acuminate; secondary veins 5-7 pairs; smaller leaf of a pair subsessile, ovate, ca. 5 mm; stipules persistent, subovate, ca. 1 mm, glabrescent. Inflorescences umbelliform or racemiform, 2-4-flowered, glabrous; peduncles 1 or 2, 1-3 cm; bracts ovate, 2-4 mm; pedicels 1-3 cm. Calyx glabrous; hypanthium portion obconic, 2-2.5 mm; lobes 5, broadly triangular, 1.5-2 mm. Corolla white, apparently rotate, glabrous or subglabrous; tube 1.5-2 mm; lobes 5, ovate, ca. 5 mm. Stamens 5; anthers coherent, dehiscent by longitudinal slits, with prolonged connective. Capsules not seen. Fl. Mar.

● Wet sites in dense forests; ca. 600 m. SW Guangxi.


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