foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.19 (2011)              | Family List  Linnaeaceae  PDF     |  eFloras.org Link Font:+ Big | - Small
   17. Linnaeaceae  
北极花科   bei ji hua ke
  
Authors:Authors: Qiner Yang & Sven Landrein

  

Shrubs, erect or creeping. Leaves opposite, sometimes whorled, simple, estipulate, with an interpetiolar line. Inflorescence terminal or axillary; flowers in 3-flowered cymes, paired or single; bracts leaflike or reduced and located at base of ovary and forming an "epicalyx." Flowers bisexual, ± zygomorphic. Perianth 4- or 5-merous. Corolla imbricate in bud; nectary consisting of ± compact glandular hairs, inside corolla tube (nectaria trichomalia). Stamens 4, alternating with corolla lobes; filaments adnate from 1/3-1/2 with corolla tube. Ovary inferior, 3- or 4-loculed, placentation axile; 1 or 2 locules with a single fertile ovule and 2 locules with numerous sterile ovules; style long, stigmas capitate. Fruit an achene crowned with persistent sepals (deciduous in Linnaea). Seeds 1 or 2; embryo small, straight; endosperm copious.

Seven genera and 19 species (including one cultivated hybrid): Afghanistan, China, India, Japan, Korea, Kyrgyzstan, Nepal, Pakistan, Russia, Uzbekistan, and in Europe and North America; six genera (two endemic) and 15 species (eight endemic, one cultivated hybrid) in China.

Hu Jia-qi. 1988. Caprifoliaceae (Linnaeeae, excluding Heptacodium and Symphoricarpos). In: Hsu Ping-sheng, ed., Fl. Reipubl. Popularis Sin. 72: 112-131.

Hu Jia-qi. 1988. Caprifoliaceae (Linnaeeae, excluding Heptacodium and Symphoricarpos). In: Hsu Ping-sheng, ed., Fl. Reipubl. Popularis Sin. 72: 112-131.

  
1Petioles of opposite leaf pairs dilated and connate at base, enclosing axillary buds; corolla hypocrateriform, with a cylindrical tube and 4 or 5 spreading lobes; flowers in 3-flowered cymes or paired; stigmas green and mucilaginous.1  Zabelia    六道木属
+Petioles of opposite leaf pairs not dilated, axillary buds exposed; corolla funnelform or bilabiate with 5 spreading lobes; flowers paired or single; stigmas white and not mucilaginous(2)
   
2(1)Two bracts accrescent and becoming winglike in fruit; ovary 4-locular with 2 fertile locules.5  Dipelta    双盾木属
+Bracts not winglike in fruit; ovary 3- or 4-locular with 1 or 2 fertile locules(3)
   
3(2)Evergreen, creeping subshrubs; two bracts shieldlike and covered with sticky glandular hairs; inflorescence reduced to 2 single flowers at apices of branchlets (those can look like paired flowers but have more bracts and internodes separating them).6  Linnaea    北极花属
+Erect shrubs; bracts and inflorescence not as above(4)
   
4(3)Bracts and bracteoles covered with bristles, accrescent and becoming spongy, woody and fused to ovaries in fruit.4  Kolkwitzia    蝟实属
+Bracts and bracteoles without bristles, small and non-accrescent in fruit(5)
   
5(4)Flowers terminal and paired (flowers opening simultaneously), sometimes 1-3(-8) due to supernumerary flowers axillary to bracteoles (more often so on repeat-bloom long shoots), spring flowering.3  Diabelia    双六道木属
+Flowers axillary, paniculate, single or paired (flowers opening consecutively), summer or autumn flowering.2  Abelia    糯米条属
   
   Lower Taxon
  • Abelia  R. Brown in Abel  糯米条属
  • Dipelta  Maximowicz  双盾木属
  • Kolkwitzia  Graebner  蝟实属
  • Linnaea  Linnaeus  北极花属
  • Zabelia  (Rehder) Makino  六道木属
  • Diabelia  Landrein  双六道木属