I. ANALYTICAL ARTIFICIAL KEY TO THE ORDERS AND 

 ANOMALOUS GENERA IN THIS VOLUME. 



DIVISION I. POLYPETALJS : calyx and corolla both present ; the latter of separate petals. 



A. Stamens numerous, at least more than 10 and more than double the number of the petals, 



1. Hypoyynous, i. e. on the receptacle free from the ovary and calyx. 



Pistils few to many distinct carpels, or rarely only one. 



Calyx mostly deciduous : juice of herbage colorless. RANUNCULACE.E, 1. 

 Calyx early deciduous : juice yellowish. Platystemon in PAPAVERACE.S;, 5. 



Calyx persistent : leaves peltate. NYMPH..EACEA:, 3. 

 Pistil a single simple carpel, forming a pod. Acacia in LEGUMINOS..E, 31. 

 Pistil compound : cells, placentae, or stigmas more than one. 

 Petals more numerous than the sepals, 



Indefinitely numerous, small, and persistent : aquatic. NYMPH.EACE.E, 3. 



Just twice as many (4 or 6), and both usually caducous. PAPAVERACE.E, 5. 



Five to 16 and more numerous than the persistent sepals. PORTULACACE^E, 16. 

 Petals of the same number as the sepals, 



Four, and both deciduous. CAPPARIDACE.E, 8. 



Four or less, but cleft, and calyx persistent. RESEDACE.E, 9. 

 Five, and the calyx persistent. 



Sepals valvate in the bud : stamens monadelphous. MALVACE^I, 20. 

 Sepals imbricated in the bud. 



Leaves opposite, entire, pellucid-punctate. HYPERICACE.E, 19. 

 Leaves alternate, not pellucid-punctate, plane. 



Corolla ephemeral : two outer sepals small and bract-like. CISTACE^:, 10. 

 Corolla gamopetalous, tubular : sepals round. Fouquiera in TAMARISCINE^E, 17. 



Leaves all radical, hollow pitchers. SARRACENIACE^E, 4. 



2. Perigynous or epigynous, borne on the (either free or adnate) calyx. 



Leafless mostly prickly fleshy plants: ovary 1 -celled. CACTACE.E, 43. 



Leafy fleshy plants, with 3 or more cells to the ovary. FICOIDE^E, 44. 



Leafy fleshy herbs, with 1 -celled ovary. PORTULACACE.E, 16. 

 Not fleshy. 



Leaves opposite, simple : sepals and petals numerous. CALYCANTHACE.E, 33. 



Leaves opposite, simple : sepals and petals 4 or 5. SAXIFRAGACE.E, 34. 



Leaves alternate, with stipules. ROSACES, 32. 

 Leaves alternate, without stipules. 



Carpels 2 or more, superior, becoming follicles. Crossosoma in RANUNCULACE.S;, 1. 

 Ovary inferior, with 3 or more parietal placentae. 



Flowers mainly dioecious : petals minute or none. D ATISCACE.*:, 42. 



Flowers perfect : petals conspicuous : leaves rough. LOASACKE, 40. 



B. Stamens 10 or less, or if more not exceeding twice the number of the petals, or sepals when 



the petals are wanting. 



1. Ovary or ovaries superior or mainly so (but sometimes enclosed in the calyx-tube). 

 * Pistils more than one and distinct. 



Pistils of just the same number as petals and as sepals. 



Leaves simple, fleshy. CRASSULACE^E, 35. 



Leaves pinnate. (Styles partly united.) Limnanthes in GERANIACE*, 24. 

 Pistils not corresponding in number with petals or sepals. 



Stamens borne on the receptacle. RANUNCULACE.S:, 1. 

 Stamens borne on the calyx. 



Stipules persistent : leaves alternate. ROSACES, 32. 



Stipules caducous : leaves opposite, compound. Staphylea in SAPINDACE^E, 29. 



Stipules none or indistinct. SAXIFRAGACE*, 34. 



