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

27. Spiradiclis petrophila H. S. Lo, Acta Bot. Austro Sin. 1: 33. 1983.

石生螺序草 shi sheng luo xu cao

Herbs, to 30 cm tall, apparently perennial, often procumbent at base, ascending above; stems densely pilosulous to tomentulose. Petiole 0.5-1.5 cm, densely pilosulous to tomentulose; leaf blade drying papery, ovate-elliptic to elliptic, 3-5 × 1.5-3 cm, densely tomentulose to pilosulous on both surfaces, base cuneate then decurrent, usually slightly inequilateral, apex acute; secondary veins ca. 9 pairs; stipules caducous, triangular, 1.5-2 mm, puberulent to glabrescent, acute and sometimes erose. Inflorescences paniculate, many flowered, densely pilosulous to tomentulose; peduncles slender, 3.5-6.5 cm; axes distally scorpioid, 1-1.5 cm; bracts narrowly triangular, 0.3-0.8 mm. Flowers sessile or subsessile, distylous. Calyx densely puberulent to hispidulous; hypanthium portion ellipsoid to obconic, ca. 0.8 mm; lobes triangular, ca. 0.3 mm. Corolla white, tubular, outside puberulent to glabrescent; tube ca. 2 mm; lobes triangular, ca. 1 mm, dorsally keeled, apically rostrate-inflexed. Capsules subglobose to obovoid, ca. 2 mm, somewhat flattened laterally, valves 2 then tardily splitting into 4. Fl. Sep, fr. Dec.

● On limestone rocks and dripping cliffs. Guangdong (Yangchun).


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