VASCULAR PLANTS OF THE YANGTZE VALLEY 



68a. Fls. not in umbels. 



69a. Styles 2-5: fls. mostly 5-merous 76. Saxifragaceae 



69b. Styles 1: fls. often 4-merous. 

 70a. Fr. dry. 



71a. Trees and shrubs. 



Fls. in terminal panicles or corymbs: fr. a capsule. 76. Saxifragaceae 



Fls. in heads: fr. a samara; lvs. alternate Camptotheca 



71b. Herbs. 



Lvs. conspicuously 3-7-nerved, opposite: anthers 



of various shapes, opening by apical pores... 126. Melastomaceae 

 Lvs. not 3-7-nerved: anthers not conspicuously 

 modified. 



Plants terrestrial 127. Onagraeeae 



Plants aquatic, floating: submersed lvs. opposite, 



finely dissected 128. Hydrocaryaceae 



70b. Fr. fleshy, drupaceous. 



Species polygamo-dioecious 123. Nyssaceae 



Species with perfect fls. 



Lvs. oblique or lobed, alternate: petals and stamens 



usually 6 124. Alangiaceae 



Lvs. not oblique or lobed, usually opposite: petals 



and stamens usually 4 132. Cornaceae 



68b. Fls. in umbels: petals and stamens 5: lvs. alternate. 



Fr. a berry or drupe: mostly woody plants, often spiny. 130. Araliaceae 

 Fr. a schizocarp of 2 dry seed-like carpels: herbs 131. Umbelliferae 



(2) Metachlamydeae 



la. Corolla regular. 

 2a. Ovary superior. 



3a. Fertile stamens more than 5. 



4a. Stamens free, not borne in clusters: fr. basally attached. 

 5a. Styles 1: stamens mostly free from the corolla. 



Capsule 3-celled 133. CLethraceae 



Capsule 5-celled. 

 Corolla cleft nearly or quite to the base: low half- 

 shrubs, perennial herbs or fleshy saprophytes 134. Pyrolaceae 



Corolla definitely gamopetalous: shrubs or trees 135. Ericaceae 



5b. Styles 2-8: stamens on the corolla: fr. a large fleshy berry 



with enlarged persistent calyx: shrubs or trees 139. Ebenaceae 



4b. Stamens borne in clusters, a cluster opposite each lobe of 

 the corolla and attached to its base: fr. obliquely 

 attached 140. Symplocaceae 



3b. Fertile stamens 2-5. 



6a. Stamens opposite the lobes of the corolla. 

 Calyx herbaceous: styles 1. 

 Woody plants, rarely subherbaceous: fr. a drupe or 



berry 136. Myrsinaceae 



Herbs: fr. a capsule 137. Primulaceae 



Calyx membranous, at least between the ribs: styles 5, 



sometimes united at the base: lvs. alternate 138. Plu?nbaginaceae 



6b. Stamens alternate with the lobes of the corolla, or fewer. 



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