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FOC | Family List | FOC Vol. 4 | Betulaceae

2. Ostryopsis Decaisne, Bull. Soc. Bot. France. 20: 155. 1873.

虎榛子属 hu zhen zi shu

Shrubs deciduous. Leaves alternate, petiolate, usually irregularly and doubly serrate or incised. Male inflorescence enclosed by buds during winter, subsessile, terminal or lateral, spicate-cymose, cylindric; bracts numerous, overlapping; each bract subtending 1 male flower; bracteoles absent; stamens 4-8, inserted at base of bracts; anthers with 2 connate thecae, without hairs at apex. Female inflorescence terminal or axillary, racemose-capitulate; bracts forming a tubular sheath, leathery, lobed at apex; flowers paired, enclosed by bracts. Nutlet ovoid-globose, with prominent ribs, completely enclosed by bracts.

* Two species: China.

1 Leaves ovate or elliptic-ovate, densely white pubescent abaxially, margin doubly serrate and usually incised above middle, apex acuminate or acute; bracts of male and female flowers pubescent   1 Ostryopsis davidiana
+ Leaves broadly ovate or ovate-orbicular, densely yellow-brown tomentose abaxially, margin irregularly and doubly serrate, apex obtuse or rounded; bracts of male and female flowers yellow-brown tomentose   2 Ostryopsis nobilis

Lower Taxa


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