92 



CHORIPETALAE. 



ovary inferior, at 



Order 

 Order 



8. Urticales. 



9. Proteales, 



Order 10. Santalales. 

 (usually 6-cGlled) 



Order 11. Aristolochiales. 



Flowers not in aments (in ament-like spikes in 

 Moms) ; but variously clustered, or rarely 

 solitary. 

 Flowers monoecious, dioecious or polygamous, or 

 perfect in Proteales ; ovary superior, 1- 

 celled. 

 Flowers regular. 

 Flowers irregular. 

 Flowers dioecious or perfect 

 least in part. 

 Ovary 1-celled. 

 Ovary several-celled 

 flowers perfect. 

 Flowers mostly perfect ; ovary superior. 



Embryo straight or nearly so ; fruit an achene. Order 12. Polygonales. 

 Embryo coiled, curved or annular ; fruit not 



an achene. Order 13. Chenopodiales. 



t$ Petals present (wanting in Ceratophyllaceae, aquatic herbs with whorled 

 dissected leaves; in many Ranunculaceae ; in Lauraceae, alternate-leaved aromatic 

 trees and shrubs: in Zantho.viilum, pinnate-leaved trees of the Rutaceae ; in many 

 Euphorbiaceae ; in some species of Ludicigia in Onagraceae ; in Proserpinaca of the 

 Haloragidaceae) . 



A. Ovary superior, free from the eah/x (partly or wholly inferior in Hydrangeaceae, 

 Grossulariaceae, Losasaceae and Malaceae). 

 Carpels solitary, or several and distinct (united in some Nymphaeaceae) ; sta- 

 mens mostly hypogynous and more numerous than the sepals ; sepals mostly 



distinct 



Carpels 2 or more, united into a compound ovary ; 

 stamens hypogynous ; sepals mostly distinct. 

 Plants not insectivorous. 



Insectivorous plants, secreting a viscid liquid, 

 with basal leaves and scapose flowers. 

 Carpels solitary, or several and distinct, or some- 

 times united ; stamens mostly perigynous or epi- 

 gynous : sepals mainly united or confluent with 

 the concave receptacle (hypanthium ). 

 Carpels united into a compound ovary ; sepals 

 mostly distinct. 

 Stamens few, rarely -more than twice as many 

 as the petals. 

 Stamens as many as the sepals or fewer 

 and opposite them, or more numerous. 

 Ovules pendulous, the raphe toward the 



axis of the ovary. 

 Ovules pendulous, the raphe away from 

 the axis of the ovary, or erect, or as- 

 cending. 

 Stamens as many as the sepals and alternate 

 with them, opposite the petals when these 

 are present ; ovules erect. 

 Stamens usually very numerous (except in 

 Violaceae and Passifloraceae) ; disc in- 

 conspicuous, or none. 

 Sepals valvate ; placentae united in the axis 



of the capsule. 

 Sepals or calyx-segments imbricated or con- 

 volute ; placentae mainly parietal, some- 

 times united in the axis. 

 Leaves bilaterally symmetrical. 

 Sepals separate. 

 Sepals united. 

 Leaves oblique. 



Order 14. Ranales. 



Order 15. Papaa'erales. 

 Order 16. Sarracexiales. 



Order 17. Rosales. 



Order 18. Geraniales. 



Order 19. Sapixdales. 



Order 20. Riiamxales. 



Order 21. Malvales. 



Order 22. 

 Order 23. 

 Order 24. 



Hypericales. 



Passiflorales. 



Begoxiales. 



Ovary inferior, adnate to the calyx, wholly or in part (except in Lythraceae and 

 our Melastomaceae. where it is usually merely enclosed by it, and in Thyme- 

 leaceae and Elaeagnaceae, which are shrubs or trees with no corolla). 



Fleshy spiny plants, with jointed stems, the leaves 

 mostly very small or none ; calyx-segments and 



petals' numerous. Order 25. Opuxtiales. 



Herbs, shrubs or trees, not fleshy or spiny ; calyx- 

 segments rarely more than 5. 

 Ovules several or numerous in each cavity of the 

 ovary (except in Haloragidaceae, aquatic 



herbs). Order 26. Myrtales. 



Ovule 1 in each cavity of the ovary. Order 27. Ammiales. 



