PEA FAMILY. 299 



Mar. Distinguished from L. Bolanderi by its much smaller and 

 narrower stipules, by its leaflets which are acute at both ape? and 

 base, and by the strong straight nerves from or near the base, which 

 proceed much above the middle of the leaflet. 



6. L. Jepsonii Greene. Herbage glabrous; stems 4 to 6 ft. high, 

 strongly winged along the angles, the wings herbaceous but often 

 callous- margined; leaflets 8 to 12, linear- lanceolate, mostly IJin. long, 

 markedly venulose; stipules semi-sagittate, both the apical and basal 

 lobes lanceolate; peduncles mostly shorter than the leaves; corolla 

 rose-purple, 9 lines long; lower calyx-teeth unequal, the middle one 

 equaling the tube. 



Suisun Marshes. Aug. -Sept. 



10. LOTUS L. 



Annual or perennial herbs, some slightly suffl'rutescent. Leaves 

 pinnate, of 1 to many leaflets, with foliaceoue, searious, or gland-like 

 stipules. Elowers in terminal or axillary umbels, or solitary and 

 axillary. Corolla yellow, reddish or whitish, sometimes pink-tinged 

 or marked with purple. Calyx-teeth nearly equal. Stamens diadel- 

 phous, 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 somewliat diverging, at least not reflexed. 

 Stipules large, f cliaceous or searious ; leaflets mostly equally distributed on 

 tlie opposite sides of the rachiis; pods linear-elongated and straight, 

 tardily dehiscent; perennials. 

 Stoutish; bract borne somewhat below the umbel; claws of the petals 

 sometimes obviously 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. cra88i_[oiius. 

 Slender; bracts borne at the umbel; claws of the petal conspicuously 



exserted from the calyx; banner yellow. 



Puberulent; wings white S. L. Torreyi. 



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



Stipules gland-like ; leaflets commonly unequally distributed on the oppo- 

 site sides of the rachis; pods readily dehiscent. 

 Flowers many in a capitate umbel; leaflets 3 to9; perennial. 

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

 Low, the branches half-prostrate or ascending, as much as 18 in. long, 

 but seldom over 5 or 6 in. high ; flowers yellowish white, turning 



red-purple 6. i. leucophieus. 



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. strigoms. 

 Peduncle l-flowered ; keel acute; leaflets 1 to 6. 



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. 

 Flowers solitary, short-pediceled, not bracted; keel acutely beaked; 

 corolla much exceeding the calyx ; annuals. 



