XXll ANALYTICAL KEY TO THE FAMILIES 



Leaves oblong, najrowed at the ends, sometimes nearly entire. 



Symplocaceae (p. 752). 

 Leaves membranaceous. 



Leaves oblong' or lanceolate, acuminate, glabrous or puberulous while 

 young, turning scarlet in the autumn. 



Oxydendrum in Ericaceae (p. 724). 

 Leaves ovate to elliptical, stellate-pubescent while young, turning 

 yellow in the autumn. Styraceae (p. 754), 



^Leaves palmately lobed. 



Stipules large, foliaceous, united ; branchlets without terminal buds. 



Platanaceae (p. 343). 

 Stipules small, free, caducous ; branchlets with terminal buds. 



Liquidambar in Hamamelidaceae (p. 339). 

 M.-M- Leaves inconspicuous or wanting ; sj)iny or prickly trees. 



Branches or stems succulent, armed with numerous prickles. 



Cactaceae (p. 684). 

 Branches rigid, spinescent. 



Leaves minute, narrowly obovate. 

 Branchlets bright green. Koeberliniaceae (p. 681). 



Branchlets red-brown. Dalea in Leguminosae (p. 570). 



Leaves scale-like. Canotia in Celastraceae (p. 623). 



**Leaves compound. 

 -* Leaves 3-foliolate, without stipules. 



Leaves persistent ; leaflets entire. Hypelate in Sapindaceae (p. 654). 



Leaves deciduous, strongly scented and bitter ; leaflets serrate or entire, acute. 



Ptelea in Rutaceae (p. 587). 

 -Leaves pinnate. 



a Leaves twice pinnate ; stipules present. 



Branches and stem armed with scattered prickles ; leaves 2-4 long ; leaflets 

 serrate, 2'-3'long. Araliaceae (p. 704). 



Branches unarmed, or armed with axillary or stipular spines ; leaflets entire or 

 crenate-serrate. 



Zygia, Lysiloma, Acacia, Leucaena, Gymnocladus, Gle- 

 ditsia in Leguminosae (pp. 535, 538, 540, 545, 553, 555). 

 aa Leaves equally pinnate. 



Stipules wanting ; leaves persistent ; leaflets entire. 



Leaflets 2-4, generally oblong-obovate. Exothea in Sapindaceae (p. 653). 

 Leaflets 6-12. 



Leaflets obtuse, 6-12. 



Leaflets 8-12, 2'-3' long ; leaves occasionally opposite. 



Simarubaceae (p. 589). 

 Leaflets 6-8, 1'-li' long. Fagara coriacea in Anacardiaceae (p. 584). 

 Leaflets acuminate, 6-8. Meliaceae (p. 593). 



Stipules present ; leaves deciduous or persistent. 



Prosopis, Parkinsonia, Cercidium, Eysenhardtia, Olneya 



in Leguminosae (pp. 547, 559, 562, 569, 575). 

 aaa Leaves unequally pinnate. 

 6 Stipules present. 



Leaflets sharply serrate ; leaves deciduous ; winter-buds resinous. 



Sorbus in Rosaceae (p. 356). 

 Leaflets entire or crenately serrate ; leaves deciduous (persistent in Eysenhardtia, 

 Olneya, and in Sophora secundijiora). 



Gleditsia, Sophora, Cladrastis, Robinia, Olneya, Ichthy- 

 omethia in Leguminosae (pp. 555, 564, 567, 571, 575, 577). 



