31. Vallaris N. Burman, Fl. Indica. 51. 1768.
纽子花属 niu zi hua shu
Parabeaumontia (Baillon) Pichon.
Shrubs trailing or scandent, latex white. Leaves opposite, dotted. Cymes umbellate or compound corymbose, axillary or terminal. Sepals free, with or without basal glands inside. Corolla subrotate, limb spreading, throat without scales; lobes broad, overlapping to right. Stamens inserted at apex or middle of corolla tube; filaments short, with a large subapical dorsal gland; anthers sagittate, partially or completely exserted, connivent, adherent to pistil head, cells with rigid basal spurs; disc ringlike or cup-shaped, 5-lobed, lobes sometimes free, ciliate. Ovaries 2, distinct. Follicles 2, free. Seeds numerous, biseriate, apex crowned with coma; endosperm starchy; embryo straight; cotyledons elliptic, base subcordate, apex rounded.
Three species: India, Indonesia, Sri Lanka; two species in China.