40. Ichnocarpus R. Brown, Mem. Wern. Nat. Hist. Soc. 1: 61. 1811.
腰骨藤属 yao gu teng shu
Lamechites Markgraf; Micrechites Miquel; Otopetalum Miquel; Springia Heurck & Müller Argoviensis.
Plants scramblers or woody lianas, with latex. Leaves opposite. Inflorescences cymose, terminal and/or axillary. Flowers small. Calyx with basal glands inside, lobes free. Corolla white, yellowish, or red, salverform; tube widened near base, throat hairy; lobes oblong, falcate, overlapping to right, in bud with inflexed distal halves. Stamens included, inserted at or below middle of corolla tube; filaments very short; anthers sagittate, adherent to pistil head, cells spurred at base; disc entire, 5-crenate or 5-denate, or deeply divided into 5 erect segments. Ovaries adnate basally to disc, pubescent; ovules numerous. Pistil head ovoid or cup-shaped. Follicles 2, spreading or divaricate. Seeds numerous, linear, compressed, not or hardly beaked, comose; endosperm copious; cotyledons long, flat, radicle superior.
Twelve species: SE Asia, N Australia, Pacific Islands; four species in China.