88 LEGUMINOS./E. 



legume narrow-linear, 7 10-seeded, slightly pubescent ; seeds pubescent. 

 P. vexillatus and P. helvolus Pursh. Strophostyles helvola and S. peduncu- 

 lar is Ell. 



Sandy fields. N. Y. to Flor. W. to Miss. July, Aug. %Stem 34 feet 

 long, prostrate or climbing. Leaf els rarely 3-lobed. Flowers purple, 3 5 on a 

 very long peduncle. Pale-red Kidney Bean. 



25. LUPINUS. Linn. Lupine. 



^From the Latin lupus, a wolf ; because it was supposed to destroy the fertility 

 of the soil.) 



Calyx deeply bilabiate ; the upper lip 2-cleft ; the lower 

 entire, or 3 -toothed. Standard with the sides reflexed. Wings 

 united at the top. Keel acuminate. Anthers 5 roundish and 

 5 oblong. Style filiform. Stigma small, capitate, bearded. 

 Legume oblong or linear, torulose, coriaceous, many-seeded. 



L. perennis Linn. : perennial, somewhat hairy ; leaves digitate ; leafets 

 7 11, obovate-oblong or oblanceolate, rather obtuse, mucronate, smoothish 

 above, a little hairy beneath ; flowers scattered in a long loose raceme ; 

 bracts shorter than the pedicels ; upper lip of the calyx emarginate, lower 

 one nearly entire ; legume linear-oblong, very hairy. 



Sandy woods. Can. to Flor. N. to Arct. Amer. W. to Miss. May, June. 

 1}.. Stem 12 18 inches high, erect or somewhat decumbent, Leafets usually 

 8 or 9, digitately arranged. Flowers purplish-blue, large, in a terminal spike or 

 raceme which is 6 10 inches long. Common Lupine. 



SUBORDER II. C^ESALPINE^E. 



* 

 Petals imbricated in aestivation, the uppermost interior. 



26. GLEDITSCHIA. Linn. Honey Locust. 

 (In honor of Gleditsch, a German botanist of the last century.) 

 Flowers by abortion imperfect or perfect. Sepals 3-4-5, 

 equal. Petals as* many 4t the sepals, arising from the tube of 

 the calyx. Stamens as many as the sepals and opposite them, 

 or by abortion fewer ; style short ; stigma pubescent above. 

 Legume compressed, 1- or many-seeded. Seeds oval, com- 

 pressed. 



G. triacantkos Linn. : branches spiny ; spines thick, simple or triple and 

 compound ; leaves equally pinnate ; leafets linear-oblong ; legume com- 

 pressed-flat, falcate, many-seeded. G. triacanthos and brachycarpa Pursh. 



Woods. N. Y. to Geor. W. to Miss. July. A tree sometimes attaining the 

 height of 40 or 50 feet, with very long spines. Leafets three-fourths of an inch 

 long, nearly smooth. Flowers in axillary racemes, greenish. Legume 10 15 

 inches long, many-seeded, the intervals between the cells of the seeds filled with 

 a saccharine pulp. The tree is sometimes unarmed, when it forms the var 

 inermis of De Candolle. Three-thorned Hwet/ Locmt, 



