1. Buckleya Torrey, Amer. J. Sci. Arts. 45: 170. 1843.
米面蓊属 mi mian weng shu
Nestronia Rafinesque, nom. rej.
Shrubs deciduous, root hemiparasites. Winter buds acute, with 2-5 pairs of scales. Leaves opposite, shortly petiolate to almost sessile, often lanceolate to ovate, membranous, pinnately veined, margin entire or very minutely serrulate, tips of first-formed leaves prominently scarious and scale-like. Inflorescences axillary and terminal; male ones cymose or umbellate; bracts absent. Flowers unisexual (plants dioecious). Male flowers small, perianth 4(or 5)-lobed, campanulate. Stamens 4(or 5), short; filaments filiform, cells parallel, dehiscence longitudinal. Disk superior, adnate to perianth tube, sinuate at margin. Female flowers terminal, sometimes also axillary, solitary; bracts sepal-like, 4(or 5), subterminal on ovary, leafy, alternate to perianth lobes, enlarged after flowering, ± persistent; perianth tube adnate to ovary, lobes 4(or 5), tiny; staminodes absent. Ovary inferior, 8-ridged or smooth when young; ovules 3 or 4. Style short; stigmas 2-4. Fruit a drupe, with deciduous perianth lobes, exocarp ± thinly fleshy, endocarp bony; bracts 4(or 5), prominent, near fruit apex, accrescent, aristate, persistent or deciduous.
Four species: three in E Asia, one in North America; two species (endemic) in China.