228 LEGUMINOSAE. 



Low hills of Solano and Sonoma cos. Apr.-May. Forma columbinum 

 dicDer. Leaflets larger, apex obtuse; heads Longer than broad, the 

 long calyx-teeth completely obscuring the small corollas; calyx-tube % 

 line long, inconspicuous; pod pubescent. Bare, aol found some seasons, 

 perhaps of hybrid origin. Collected only in middle western California (T. 

 columbinum Greene). 



23. T. californicum Jepson. Sparsely to densely pubescent, I to 1% 

 ft. high; stipules sm.-ill, ovate-acuminate; petioles slender; leaflets ovate to 

 elliptical or cuneate-obovate, 5 to 14 linos long; heads cylindric, spike-like, 

 truncate :it top, turbinate at base; flowers short, rich purple, cream-tipped; 

 corollas Longei than the calicos; pod 1-seeded. — (T. dichotomurn Jepson not 

 H. & A.) 



A beautiful but local species, gregarious, covering patches a rod square, 

 in the hills of the Coast Ranges. Forma turbinattjm Jepson. Smaller than 

 the species; heads turbinate, truncate, 5 lines long, 7 lines broad at the top; 

 flowers purple, cream-tipped; corolla exceeding the calyx; pod 1 to 2-seeded. — 

 Same range as the species. Apr.-May. (Var. turbinatum Jepson.) 



8. LOTUS L. 

 Annual or perennial herbs, some slightly suffrutescent. Leaves pinnate, 

 of 1 to many leaflets, with foliaceous, scarious, or gland-like stipules. Flowers 

 in terminal or axillary umbels, or solitary and axillary. Corolla yellow, red- 

 dish or whitish, sometimes pink-tinged or marked with purple. Calyx-teeth 

 nearly equal. Stamens diadelphous, free from the petals; anthers all alike. 

 Style incurved. Pod flattened or terete, sessile, 2 to commonly several-seeded, 

 often septate between the seeds, dehiscent or indehiscent. (A Greek name.) 



A. Pods dehiscent. 

 Flowers and pods erect or somewhat diverging, at least not reflexed. 



Stipules large, foliaceous or scarious; leaflets mostly equally distributed on the opposite 

 sides of the rachis; pods linear-elongated and straight, tardily dehiscent; perennials. 

 Stoutish; bract borne somewhat below the umbel; claws of the petals sometimes ob- 

 viously exserted from the calyx. 



Glandular-hispidulous and viscid; leaflets 11 to 21, thinnish 1. L. stipularis. 



Nearly glabrous, glaucous, not viscid; leaflets 9 to 11, thick.... 2. L. crassifolius. 

 Slender; bracts borne at the umbel; claws of the petals conspicuously exserted from 

 the calyx; banner yellow. 



Puberulent ; wings white 3. L. torrcyi. 



Glabrous; wings pink or rose-color 4. L. formosissimus. 



Stipules gland-like; leaflets commonly unequally distributed on the opposite sides of the 

 rachis; pods readily dehiscent. 

 Flowers many in a capitate umbel; leaflets 3 to 9; perennial. 



Tall, 1 to 5 ft. high; flowers yellow, turning orange 5. L. grandiflorus. 



Low, the branches half-prostrate or ascending, as much .is IS in. long, but seldom 



over 5 or 6 in. high; flowers yellowish white, turning red-purple 



6. L. leucophaeus. 

 Flowers 1 to several, on an elongated bracted peduncle; rachis (except in nos. 9 and 

 10) conspicuously dilated; annuals. 



Peduncle 2 to 5-flowered; keel obtuse; leaflets commonly 7 7. L. salsuginosus. 



Peduncle 1 or 2-flowered; keel obtuse; leaflets 5 to 9 8. L. strigosus. 



Peduncle 1-flowered; keel acute; leaflets 1 to 5. 



Corolla twice as long as the calyx; pods constricted between the seeds; leaflets 



mostly 3 or 4; herbage glabrous 9. L. micrantkus. 



Corolla scarcely exceeding the calyx; pods not constricted; leaflets 1 to 4, mostly 



3; herbage villous-pubescent 10. L. americanus. 



Flower- solitary, Bhort-pediceled, not bracted; keel acutely beaked; corolla much ex- 

 ceeding the calyx; annuals. 



Calyx-teeth linear, much longer than the tube; pods oblong, 2 or 3-seeded 



_ . ILL. humistratus. 



Calyx-teeth equaling the tube: pods linear, 5 to 7-sccded 12. L. subpinnatus. 





