KEY TO THE ORDERS. XV 



B. Stamens not more than twice as many as the petals. 



* Stamens just as many as the petals, and one stamen in front of 



each petal. 



BEKBERIDACE^E. Herbs (with us). Anthers opening by 



uplifting valves 8 



PORTULACACE.E. Sepals 2. Styles 3-cleft. Leaves 2, 



fleshy ; 23 



VITACE.E. Shrubs, climbing by tendrils. Calyx minute. 29 



RHAMNACE.E. Shrubs, not climbing 29 



Lysimachia, in 



PRIMULACE^E, is occasionally polypetalous. Flowers yel- 

 low, in axillary spikes ; the petals sprinkled with 

 purplish dots 91 



* * Stamens either just as many as the petals and alternate with 



em, or not of exactly the same number. 



+- Corolla irregular. 



FUMARIACEJE. Corolla flattened and closed. Stamens 6. 11 



VIOLACE^E. Corolla 1-spurred. Stamens 5. Pod with 3 



rows of seeds on the walls 17 



BALSAMINACE.E. Corolla 1-spurred, the spur with a tail. 



Stamens 5. Pod bursting elastically 27 



POLYGALACE.E. Lower petal keel-shaped, usually fringed 

 at the top. Anthers 6 or 8, 1 -celled, opening at 

 the top. Pod 2-celled 32 



LEGUMINOS^E. Corolla mostly papilionaceous. Filaments 

 often united. Ovary simple, with one parietal 

 placenta. Leaves compound 33 



-t-+- Corolla regular, or nearly so. 



1. Calyx superior (i.e., adherent to the ovary, wholly or 

 partially). 



(a) Stamens perigynous (inserted on the calyx). 

 Crataegus, in 



ROSACES. Shrubs. Stamens occasionally from 5 to 10 only. 



Leaves alternate, with stipules. Fruit drupe-like, 



containing 1-5 bony nutlets. 38 



SAXIFRAGACE.E. Leaves opposite or alternate, without 



stipules. Styles or stigmas 2 ; in one instance 4. 



Ovary 1 -celled, with 2 or 3 parietal placentae ^ 46 



