ANALYTICAL KEY 9 



Styles united, often short, or rarely wanting; capsule 



loculicidal. 

 Plants with bulbs, corms, erect rootstocks, or 



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



Plants with elongated horizontal rootstocks 



24. CONVALLARIACEAE, 119 



Styles distinct; capsule septicidal 23. MELANTHACEAE, 117 



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

 ored petals) ; leaves linear and the flowers in umbels 



19. COMMELINACEAE, 107 



Flowers dioecious; plants scrambling or climbing 25. SMILACACEAE, 121 

 Stamens dissimilar, or only 3 with fertile anthers. 



Peiianth of 3 herbaceous sepals and 3 colored ephemeral petals 



19. COMMELINACEAE, 107 



Perianth tubular, 6-lobed 20. PONTEDERIACEAE, 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 15. HYDROCHARITACEAE, 38 



Terrestrial plants with perfect flowers, and 2-ranked equitant leaves 



26. IRIDACEAE, 121 



Stamens 1 or 2; flowers irregular. 



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



spurred 27. ORCHIDACEAE, 122 



CLASS 2. DICOTYLEDONS 



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

 Embryo with a pair of opposite cotyledons. Parts of the flower mostly in 

 fours or fives. 



COROLLA WANTING; OFTEN THE CALYX ALSO 



FLOWERS MONOECIOUS OR DIOECIOUS; ONE OR BOTH SORTS IN AMENTS 



Staminate or pistillate flowers (not both) in aments or in ament-like clusters. 



Trees; the leaves alternate. 

 The sap not milky. 



Fruit a samara, winged all around 31. ULMACEAE, 143 



Fruit a nut or an achene 30. FAGACEAE, 141 



The sap milky 32. MORACEAE, 143 



Herbs or herbaceous vines, mostly with opposite leaves. 



Styles and stigmas 2 32. MORACEAE, 143 



Style and stigma 1 33. URTICACEAE, 144 



Staminate and pistillate flowers both in aments. 



Ovary 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. BETULACEAE, 139 



Plants parasitic on trees 34. LORANTHACEAE, 145 



