ANALYTICAL KEY 9 



Styles united,, often short, or rarely wapting; capsule 

 loculicidal. 

 Plants with bulbs, corms, erect rootstocks, or • ■ 



caudices, or bundles of fleshy roots 22. Liliaceae, 113 



Plants with elongated horizontal rootstocks ' 



24. ConvAllariA'ceae, 119 

 Styles distintt;' capsule septicidal " 23. Mei,antha'cI!ae, 117 

 Divisions of the perianth unlike (3 green sepals and 3 col- ' 

 ored petals) ; leaves linear and the flowers ' id umbels 



"' ' •'•■!' 19. COMMELINACEAE, 107 



Flowers dioecious; plknts scrambling or olinibing 25. Smilacaceae, 121 

 Stamens dissimilar, or only 3 with fertile anthers. 



Fuiianth of 3 herbaceous sepals and 3 colored ephemeral petals 



19;' COMMEIilNACBAE, 107 



Perianth tubular, 6-lobed 20. Pontedbriaceab, 108 



PERIANTH, PRESENT, ADNATE TO THE OVARY 



Stamens 3 or more; flowers regular or nearly so. 



Aquatics, ripening their fruit under water; flowers dioecious or 



polygamous , i ,, . ;, .n, . ,. . 15. II^pRqq^ABiTACEAE, 38 



l^errestrial plants with perfect flowers, and 2-ranked equitant leaves 



; ,., : •26... Ibidacbae, 121 

 Stamens 1 or 2; flowers irregular. , , , -^ • 



Sepals usually 3 ; petals usually 3, one of which (the lip) is generally 



spurred 27. Orchidaceab, 122 



Class 2. DICOT'YLiEDONS' " 



Stems with central pith inclosed by a zone of wood. Leaves net-veined. 

 Embi^o with a pair of opposite cotyledons. Parts of the flower mostly in 

 fours or fives. 



COROLLA WANTING; OFTEN THE CALYX ALSO 



FLOWERS MONOECIOUS OK DIOECIOUS; ONE OR BOTH SORTS IN AMENTS 



Staminate or pistillate flowers {not bpth) in ament,s.qr in ament-like clusters. 



Trees; the leaves alternate. ' 



' The sap not m:ilky. 



Fruit a samara, winged all around 



Fruit a nut or an achene ' 



The sap milky 



*■ 31. Ulmaceae, 143 

 30. Fagacbae, 141 

 32. moeaceae, 143 



Herbs or herbaceous vines, mostly with opposite leaves. 



Styles and stigmas 2 32. : MoRACbae, 143 



Style and stigma 1 "33j IjRTiCAfcEAE, 144 



Staminate and pistillate flowers both in aments. - • 



Oyary becoming a 1-celled, many-seeded pod; the seeds hairy^tufted 



28. Salicaceae, 127 



Ovary becoming a 1-seeded nut, achene, or berry. 



Trees'or shrubs, not parasitic ' '' 29. Bbtulaoeae, 139 



Plants parasitic on trees, 34. Loranthaceab. 145 



