foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.13 (2007)              | Family List  Elaeagnaceae  PDF     |  eFloras.org Link Font:+ Big | - Small
   18. Elaeagnaceae  A. L. Jussieu
胡颓子科   hu tui zi ke
  
Authors:Qin Haining (覃海宁); Michael G. Gilbert

  

Trees or shrubs, deciduous or evergreen; most parts with distinctive silvery or brownish peltate scales and/or stellate hairs, sometimes branches spine-tipped. Leaves alternate, opposite, or whorled; stipules absent; petiole usually present, sometimes short; leaf blade often leathery, simple, margin entire or subentire, abaxially densely stellate-hairy or peltate-scaly, pinnately veined. Flowers solitary or in clusters or short racemes, actinomorphic, bisexual, or unisexual (plants dioecious). Calyx in bisexual and female flowers tubular, 2-6(-8)-lobed, male flowers of Hippophae of 2 membranous sepals. Petals absent. Stamens 4-8, free, adnate to calyx tube, in male flowers 2 × as many as the lobes, in bisexual flowers as many as the lobes and alternate with them. Ovary superior but tightly enclosed in differentiated basal part of calyx and apparently inferior, 1-loculed; style elongate, stigma lateral. Ovule 1, basal, anatropous. Fruit drupelike, indehiscent, enclosed in base of calyx tube and containing a single seed.

Three genera and ca. 90 species: N temperate and tropical regions; two genera and 74 species (59 endemic) in China.

The fruits of many members of this family are edible, and some species of both Elaeagnus and Hippophae are widely utilized and sometimes cultivated as fruit trees. They are a particularly good source of Vitamin C. Several species are also grown as ornamental garden shrubs. The roots are able to fix atmospheric nitrogen making it possible for plants to grow well on very poor soils. For this reason, some species, most notably Elaeagnus angustifolia, have been used for land reclamation.

Chang Che-yung. 1983. Elaeagnaceae. In: Fang Wen-pei & Chang Che-yung, eds., Fl. Reipubl. Popularis Sin. 52(2): 1-66.

  
1Flowers bisexual; calyx 4-lobed; stone 8-ribbed; leaves always alternate.1  Elaeagnus    胡颓子属
+Flowers unisexual (plants dioecious); calyx minutely 2-lobed; stone with longitudinal groove on one side; leaves alternate, opposite, or whorled.2  Hippophae    沙棘属
   
   Lower Taxon
  • Elaeagnus  Linnaeus  胡颓子属
  • Hippophae  Linnaeus  沙棘属