I 



LEGUMINOSAE (PULSE FAMILY) 507 



from the ends of the branches. Stipules obsolete. Base of the petioles hollow, 

 inclosing the leaf-buds of the next year. Bracts minute and fugacious. (Name 

 from K\ddos, a branch, and Qpavo-rds, brittle.) 



1. C. lutea (Michx. f. ) Koch. Sometimes 15 m. high ; pods 7.5-10 cm. long. 

 (C. tinctoria Raf.) Rich woods and calcareous bluffs, Ky. to N. C., n. Ala., 

 and Mo. ; also in cultivation. May. 



12. SOPHORA L. 



Calyx bell-shaped, shortly 5-toothed. Standard rounded ; keel nearly 

 straight. Stamens distinct or nearly so. Pod coriaceous, stipitate, terete, 

 more or less constricted between the seeds, indehiscent. Seeds subglobose. 

 Shrubby or ours an herbaceous perennial, the leaves pinnate with numerous 

 leaflets, and flowers white or yellow in terminal racemes. (Said by Linnaeus 

 to be the ancient name of an allied plant.) 



1. S. sericea Nutt. Silky-canescent, erect, 3 dm. high or less ; leaflets 

 oblong-obovate, 6-12 mm. long; flowers white; pods few-seeded. Prairies, 

 Neb. and Kan. to Col., Tex., and Ariz. Apr., May. (Mex.) 



13. CROTALARIA [Dill.] L. RATTLE-BOX 



Calyx 5-cleft, scarcely 2-lipped. Standard large, heart-shaped ; keel scythe- 

 shaped. Sheath of the monadelphous stamens cleft on the upper side ; 5 of 

 the anthers smaller and roundish. Pod inflated, subcylindric, many-seeded. 

 Herbs with simple leaves. Flowers yellow. (Name from icpdraXov, a rattle; 

 the loose seeds rattling in the coriaceous inflated pods.) 



* Pubescence spreading-ascending, prominent. 



1. C. sagittalis L. Annual, hairy, suberect, 7.5-25 cm. high ; leaves oval 

 or oblong-lanceolate, scarcely petioled, narrowed to each end; stipules often 

 conspicuous, united and decurrent on the stem, so as to be inversely arrow- 

 shaped ; peduncles few-flowered ; corolla not longer than the calyx ; pod black- 

 ish. Sandy soil, e. Mass, and s. Vt. to Fla. and Tex., chiefly coastal; and 

 northw. in Miss, basin to Ind. and S. Dak. June-Sept. (Mex.) 



2. C. rotundifblia (Walt.) Poir. Thick-rooted perennial; stems several, 

 prostrate or nearly so; leaves suborbicular or oval, rounded at each end; 

 stipules few or wanting. (C. ovalis Pursh.) Sandy soil, s. Va. to Fla. and 

 La. May-July. 



* * Pubescence oppressed and inconspicuous. 



3. C. Purshii DC. Perennial ; stems several, erect or ascending ; leaves 

 linear to oblong ; stipules usually large and conspicuous. Sandy soil, s. Va. 

 to Fla. and Tex. May- July. 



14. GENISTA L. WOAD-WAXEN. WHIN 



Calyx 2-lipped. Standard oblong-oval, spreading; keel oblong, straight, 

 deflexed. Stamens monadelphous, the sheath entire; 5 alternate anthers 

 shorter. Pod mostly flat and several-seeded. Shrubby plants, with simple 

 leaves, and yellow flowers. (Name from the Celtic gen, a bush.) 



1. G. TINCTORIA L. (DYER'S GREENWEED.) Low, not thorny, with striate- 

 angled erect branches; leaves lanceolate; flowers in spiked racemes. Estab- 

 lished on sterile hills and roadsides, s. Me. to Mass, and e. N. Y. June, July. 

 (Nat. from Eu.) 



15. CYTISUS [Tourn.] L. BROOM 



Calyx campanulate, with 2 short broad lips. Petals broad, the keel obtuse 

 and slightly incurved. Stamens monadelphous. Pod flat, much longer than 

 the calyx. Seeds several, with a strophiole at the hilum. Shrubs, with stiff 



