LEGUMINACEAE (BEAN FAMILY) 135 



PRUNUS (Plum, Cheery) 



Shrubs or trees. Flowers white or pink, clustered. Petals spreading. 

 Style terminal. Fruit glabrous, stone smooth or nearly so, terete or flat. — 

 (Latin name of the pkmx.) Here belong the following : P. armeniaca (Apri- 

 cot) ; P. cerasus (Pie cherry) ; P. avium (Sweet cherry) ; P. domestica 

 (Cultivated plum), and a variety of the same (Prune). 



A. Fruit 15-20 mm. long; stone flat; flowers not in racemes. W. E. 



P. subcordata (wild plum) 

 AA. Fruit 4-10 mm. long; stone subglobose. 

 B. Flowers in corymbs; fruit bright, red; petiole without glands. W. C. E. 



' P. emarginata (wild cherryJ 



BB. Flowers in racemes; fruit dark purple; petiole usually with 2 glands just below 



point of attachment to blade. W. E. P. demissa (chokecherry) 



LEGUMINACEAE (Bean Family) 



Herbs or shrubs or trees, often vining. Leaves alternate, mostly 

 compound; stipules present. Flowers irregular, papilionaceous. 

 Calyx 4-5-toothed or -cleft, sometimes 2-lipped. Petals distinct 

 or somewhat united, usually consisting of i wide upper one (stan- 

 dard) and 2 lateral ones (wings) and 2 lower usually united ones 

 (keel). Stamens monadelphous or diadelphous or rarely distinct, 

 10 or rarely 5. Pistil 1, simple; ovary superior, usually i-celled, 

 sometimes lengthwise 2-celled by the intrusion of the sutures, 

 sometimes crosswise 2- to several-celled; style i. Fruit a pod, 

 dehiscent by 2 valves or indehiscent, sometimes breaking crosswise 

 into joints. Seeds i to many. — Species keys omitted in certain 

 difficult genera. (F. & R. pp. 224-242.) 



A. Trees, cultivated; stipules often spiny; leaves pinnately compound. W. E. — 

 Planted for shade. (Honor of J. and V. Robin, who first cultivated the tree 

 in Europe.) Roots, leaves, and bark poisonous. Robinia pseudacacia (locust) 



AA. Shrubs. 



B. Plant spiny; leaves simple, often becoming spines; branches not or hardly 

 4-angIed, not conspicuously green. W. — (The Latin name.) 



Ulex europeus (gorse) 



BB, Plant not spiny; leaves with 1-3 leaflets, not becoming spines; branches 



conspicuously 4-angIed, dark green. W. E. — Ornamental shrub; escaped. 



(From Cythras, one of the Cyclades, where this or a related plant was first 



found.) Cytisus scoparius (scotch bsoom) 



AAA. Herbs, or somewhat shrubby at base. 



C. Leaves with 3 leaflets. 



D. Stamens distinct; stipules free; leaflets entire; flowers yellow, in terminal 

 3-bracted racemes. THERMOPSIS (p. 137) 



