VASCULAR PLANTS OF THE YANGTZE VALLEY 



Petals 5: lvs. entire, flat or terete: plants 



succulent 55. 



Petals 4: lvs., at least the lower ones, finely divided 

 or decompound, alternate. 

 Fls. regular: lvs. finely divided: sepals joined 

 into a pointed hood and falling as the fl. 



opens 



Fls. irregular: lower lvs. decompound: sepals 



small and scale-like 71. 



36b. Sepals 5 or 4. 

 37a. Gynoecium of few to many free carpels: stamens 

 free. 

 38a. Carpels several to many, forming an aggregate 

 fr. 

 39a. Stamens 5 or 6: deciduous shrubs with opposite 

 entire lvs. : fls. solitary or in pairs at the 

 nodes, developing before the lvs 68. 



40a. Stamens attached to the convex or cylindric 

 receptacle: sepals free. 



41a. Plants herbaceous: sepals 5 or more 60. 



41b. Plants woody: sepals 3: lvs. alternate. 



Carpels or pistils spirally arranged on a 



more or less elongated axis. 



Fr. capsular: stipules present, large, 



enclosing the succeeding young 



leaf: fls. perfect: trees or shrubs. 65. 



Fr. berry-like: stipules wanting: fls. 



unisexual: twining shrubs 66. 



Carpels in a single whorl around a short 

 axis: fls. perfect: fr. of woody 

 follicles: trees or shrubs 67. 



40b. Stamens attached to the calyx cup (hypan- 

 thium): sepals united below: herbs or 

 shrubs: lvs. alternate 80. 



38b. Carpels few, not more than 5. 

 42a. Carpels 1: fr. an achene, drupe, berry or 

 capsule: lvs. alternate. 

 Stamens few, opposite the petals; anthers 

 opening by hinged valves: fr. a berry 



or capsule 63. 



Stamens many; anthers not opening by 

 hinged valves: fr. an achene or drupe. 80. 



42b. Carpels 2-5: fr. a follicle. 



Stamens numerous, attached to the convex 



or cylindric receptacle: sepals free 60. 



Stamens few, not more than 2xthe petals, 

 attached to the calyx: sepals united 

 below. 

 Carpels as many as the sepals: plants 



usually succulent 75. 



Carpels fewer than the sepals: plants not 

 succulent 76. 



12 



Portulaceae 



Eschscholzia 

 Fumariaceae 



Calycanthaceae 



Ranunculaceae 



Magnoliaceae 

 ScJiisandraceae 



Illiciaceae 

 Rosaceae 



Berberidaceae 

 Rosaceae 



Ranunculaceae 



Crassulaceae 

 Saxifragaceae 



