1915] 



BESSEY PHYLOGENETIC TAXONOMY 159 



Family 264. Icacinaceae. Tropical trees and shrubs, with 

 alternate or opposite leaves and regular, perfect or diclinous 

 flowers ; sepals 5 ; petals 5 ; stamens 5 ; pistil superior, 1-celled, 

 and tricarpellary ; endosperm fleshy. Icacina. (Pf. 3 5 : 233.) 



Family 265. Melianthaceae. Tropical trees and shrubs, 

 with alternate leaves, and pentamerous, mostly perfect, zygo- 

 morphic flowers ; endosperm fleshy. Melianthus. (Pf. 3 5 : 374.) 



Family 266. Empetraceae. Heath-like shrubs, with small 

 alternate leaves; flowers small, regular, mostly dioecious, 

 solitary or in heads ; petals present ; stamens 2-3, 2-3-celled ; 

 pistil 2 to many-celled ; seeds solitary, endospermous. Corema, 

 Empetrum. (Pf. 3 5 :123.) 



Family 267. Coriariaceae. Shrubs with opposite, sessile 



leaves and perfect or diclinous flowers ; 5 sepals ; 5 petals ; 10 

 stamens ; 5-10 carpels, slightly united ; seeds few ; endosperm 

 scanty. Coriaria. (Pf. 3 5 :128.) 



Family 268. Anacardiaceae. Sumachs. Trees and shrubs, 

 mostly tropical, with alternate, usually compound leaves and 



small, perfect flowers; petals 3-7 or 0; pistil 1-5-celled, 

 superior, but surrounded by the fleshy cup; ovules solitary, 

 pendulous (or erect) ; endosperm 0. Mangifera, Anacardium, 

 Schinus, Cotinus, Metopium, Rhus. (Pf. 3 5 : 138.) 



Family 269. Juglandaceae. Walnuts. Trees and shrubs, 

 with alternate, compound leaves and small, diclinous, apet- 

 alous flowers ; pistil bicarpellary, 1-celled, adnate to the fleshy 

 cup, and so inferior ; ovule 1, erect, orthotropous ; endosperm 

 0. Engelhardtia, Juglans, Hicoria. (Pf. 3 X :19.) 



Family 270. Betulaceae. Birches. Trees and shrubs, with 

 alternate, simple leaves, and monoecious or dioecious flowers, 

 which are in aments; petals none; calyx small or none; sta- 

 mens 2-10 ; pistil inferior, bicarpellary, 1-2-celled ; endosperm 

 0. Carpinus, Ostrya, Corylus, Betula, Alnus. (Pf. 3 1 : 38.) 



Family 271. Fagaceae. Beeches. Trees and shrubs, with 

 alternate, simple leaves and small, diclinous flowers ; petals ; 

 pistil mostly tricarpellary, 2-6-celled, inferior; ovules 2 in 

 each cell, erect or pendulous; fruit usually 1-seeded; endo- 

 sperm 0. Fagus, Castanea, Pasania, Quercus. (Pf. 3 1 :47.) 



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