KEY TO THE FAMILIES 



9a. Fr. winged, a samara: trees with alternate simple 



Ivs 41. 



9b. Fr. a drupe, achene or utricle. 

 10a. Fr. a drupe: lvs. alternate. 



Lvs. simple: fr. a drupe or samara. 



Plants woody, trees: lvs. often oblique: stone 



of fr. not crescent-shaped 41. 



Plants apparently herbaceous, climbing vines: 



stone of fr. crescent-shaped 64. 



Lvs. pinnately compound: fr. a drupe, variously 



colored 



10b. Fr. an achene or utricle. 



11a. Lvs. palmately lobed or divided: erect or twining 



herbs 43. 



lib. Lvs. simple, pinnately veined: erect herbs or 

 shrubs. 

 Perianth not enlarged or winged in fr. : stipules 



not sheathing 44. 



Perianth or its associated bracts spiny, enlarg- 

 ed or winged in fruit. 

 Stipules sheathing the stem: fr. an achene, 



subtended by the winged perianth 



Stipules none: fr. a utricle, enclosed in a 



spiny capsule-like body 



8b. Fr. a capsule or berry. 

 12a. Woody vines with alternate palmately compound lvs. 



Carpels few, becoming large 1-seeded berries. ..61. 

 Carpels many, becoming stipitate 1-seeded berries. 62. 

 12b. Trees, shrubs or herbs, not vines. 

 13a. Plants spiny: trees or shrubs with alternate lvs. 

 Lvs. pinnately compound or trifoliolate, punc- 

 tate with glandular dots 



Lvs. simple, not punctate, evergeen 



13b. Plants unarmed. 



14a. Lvs. trifoliolate; trees with berry-like fr 



14b. Lvs. simple. 



15a. Plants evergreen: shrubs or trees 92. 



15b. Plants deciduous or herbaceous. 



Fr. a capsule, dehiscent 91. 



Fr. a fleshy berry. 



Shrub: berries solitary in the axils of 

 small (1-5 cm. long) glabrous entire 



lvs 



Tree: berries in terminal panicles: lvs. 

 alternate, large (7-15 cm. long), densely 

 short-hairy beneath; margins more or 



less coarsely serrate or dentate 114. 



6b. Fls. bisexual or polygamous. 

 16a. Fr. an achene, an aggregation of achenes, or a utricle. 

 17a. Plants with sheathing stipules (ocreae): lvs. alternate. 49. 

 17b. Plants without sheating stipules. 

 18a. Fr. a utricle. 



Bracts of the infl. none, or not scarious 50. 



Bracts of the infl. and sepals scarious 51. 



9 



Ulmaceae 



Ulmaceae 



Menispermaceae 



Pistacia 



Cannabinaceae 



Urticaceae 



Rumex 

 Spina cia 



Lardizabalaceae 

 Sargentodoxaceae 



Zanthoxylum 

 Xylosma 



Bischofia 



Buxaceae 



Euphorbiaceae 



Phyllanthus 



Fiacourtiaceae 



Polygonaceae 



Chenopodiaceae 

 Amaranthaceae 



