PEA FAMILY 137 



10. ANISOLOTUS Beinh. Deer-weed. 



Annual; plant villous; flowers subsessile in the axils of the leaves. 1. A. brachycarpus. 

 Perennials; plant appressed-pubescent ; flowers mostly several together, on a peduncle 

 (e.xcept often in No. 2). 

 Leaflets closely crowded on the very short racliis, oblanceolate to linear; peduncles 

 less than 5 cm. long; stem erect. 

 Inflorescence 1-2-flowered, usually subsessile in the axils of the leaves; calyx-teeth 



equalling the tube. 2. A. Wrightii. 



Inflorescence 2-5-flowered, distinctly peduncled; calyx-teeth shorter than the 

 tube. 3. A. puberulus. 



Leaflets not crowded on the evident racliis; stem decumbent. 



Flowers about 1 cm. long; pedimcles 1-2 cm. long; leaflets linear-oblong. 



4. A. nummularius. 

 Flowers 12-15 mm. long; pedimcles 4-10 cm. long. 



Leaflets Unear to oblong; bracts longer than the calyx; pods divaricate or re- 

 fle.xed. 5. ^1. longebracteatus. 



Leaflets obovate or cimeate; bracts shorter than the calyx; pods erect or 

 ascending. 6. A. rigidus. 



11. SYRMATIUM Vogel. l. S. dccumbens. 



12. AMORPHA L. False Indigo, Shoe-strings. 



Tall shrub; leaflets 2-5 cm. long; pods usually 2-seeded; leaves petioled; pod curved. 



1. A. angusti folia. 

 Low shrubs; leaflets 0.5-1.5 cm. long; pods 1-seeded. 



Glabrous or nearly so; spikes usuallj solitary at the end of the branches; leaves peti- 

 oled; pod straight. 2. A. nana. 

 Densely canescent; spikes usually clustered; leaves subsessile; pod curved. 



3. A. canescens. 



13. PSORALEA L. Pomme de Prairie, Pomme Blanche, 



Bread-root, Indian Turnip. 



Flowers small, less than 8 mm. long, in racemes or interrupted spikes; root not tuberous; 

 pod indehlscent. (Psoralidium.) 

 Stem-leaves reduced to scales. 1. P. juncea. 



Stem leaves all 3-5-foliolate. 



Flowers in racemes, i. e., distinctly pedicelled. 



Pods globose; corolla white, only the keel tipped with purple. 



Racemes short and dense, elliptic oi oblong; calyx-lobes obtuse. 



Leaflets linear to lance-oblong; fruit glabrous or sparingly strigose. 

 Leaflets lance-oblong to linear. 2. P. lanceolata. 



Leaflets narrowly linear. 3. P. micrantha. 



Leaflets spatulate or obovate; friiit long-villous. 4. P. Purshii. 



Racemes lax, elongate, caly.x-lobes acute. 



Leaves oblanceolate; pod densely villous. 5. P. stenostachys. 



Leaves narrowly linear; pod strigose. 6. P. stenophylla. 



Pods ovoid; corolla blue or purplish; raceme elongate, lax. 



Leaflets from linear-oblanceolate to obovate; pods with short beaks. 



7. P. tenuiflora. 

 Leafletsnarrowly linear; pods with longer beaks. 8. P. linearifolia. 



Flowers in interrupted spikes. 



I^eaves not silvery below; flowers about 6 mm. long; bracts minute. 



9. P. collina. 

 Leaves silvery-wliite at least below; flowers 7-8 mm. long; bracts at least half 

 as long as the calyx. 

 Leaflets oval; bracts lanceolate, acuminate; calyx not inflated in fruit. 



10. P. argophylla. 

 Leaflets linear; bracts obovate; calyx inflated in fruit. 11. P. digitata. 

 Flowers large, over 1 cm. long, in dense, head-like spikes; plant with a deep-seated, 

 tuberous, farinaceous root; pod long-beaked, circumscissile or bursting irregularly. 

 (Pediomelum.) 

 Tall, leafy and branched, usually over 4 dm. high ; strigose throughout; lower calyx- 

 teeth cuspidate-acuminate. 12. P. cuspidata. 

 Low and more simple, 1-3 dm. liigh; lower calyx-teeth not cuspidate-acuminate. 

 Plants with long scattered hairs, not cinereoiLs; leaflets linear to obovate. 



Stem and pedimcles hirsute, with spreading pubescence; lower calyx-lobe not 



much larger than the rest. 13. P. esculenla. 



Stem, short peduncles and pedicels, with appressed pubescence; lower calyx- 

 lobe much broader than the rest. 14. P. hypogaea. 

 Plant cinereous, with short appressed pubescence; leaflets broadly obovate or 

 rounded-spatulate. 

 Lowest calyx-lobe not much longer than the rest. 



Petioles with appressed pubescence; corolla nearly 2 cm. long. 



15. P. megalantha. 

 Petioles with spreading or reflexed hairs; corolla about 12 mm. long. 



16. P. mephitica. 

 Lowest caly.x-lobe obovate or spatulate, obtuse, much larger than the rest. 



17. P. casiorea. 



14. PAROSELA Cav. 



"Wing- and keel-petals inserted at the base of the staminal tube; pods exceeding the 

 calyx; shrubs. (Xylodalea.) 



