Trifolium. LEGUMIN0S.3E. 125 



1. c. — L. Memiesii, Agardh, Synopsis, 2; Hook. Bot. Mag. t. 5019. L. Memiesii, 

 var. aurea, Kellogg, L c. v. 16. 



From the Sacramento Valley southward ; frequent. 



41. L. luteolus, Kellogg. Eatker slender, 1 or 2 feet high : pubescence short, 

 appressed, rather silky, the bracts and pod villous : stipules short ; leaves scattered, 

 on short petioles ; leaflets usually 7, cuneate-oblong, an inch long, obtuse or 

 acute, sometimes smooth above : bracts linear-setaceous, exceeding the calyx: flowers 

 as in the last ; the petals pale-yellow, six lines long. — Proc. Cali£ Acad. v. 38. 

 L. Bridgesii, Gray ; Watson, 1. c. 538. 



Sacramento Valley (Bridges) ; Napa Valley (Greene) ; Mendocino Co., Bolaiider, Kellogg. 



* * Low : flowers scattered in the racemes : bracts shorter than the calyx. 



42. L. pusillus, Puish. Rather stout, 3 to 10 inches high, hirsute with long 

 spreading hairs: leaflets mostly 5, cuneate-oblong or -oblanceolate, | to \\ inches 

 long, acute or obtuse, nearly smooth above, about half as long as the petioles : ra- 

 cemes 2 or 3 inches long, nearly sessile ; pedicels 2 or 3 lines long : upper calyx-lip 

 2-cleft : petals purple or rose-color, four lines long : pod half an inch long or more : 

 seed nearly two lines broad. — Flora, i. 468 ; "Watson, 1. c. 538. 



From the Missouri to the Columbia and southward, east of the Sierra Nevada, to Arizona and 

 New Mexico ; doubtless occurring in Northeastern California. 



43. L. brevicaulis, Watson. Less hairy, or villous with soft spreading hairs, 

 1 to 6 inches high : stems often short or nearly wanting : leaflets usually 7, cuneate- 

 obovate or oblanceolate, 5 to 8 lines long, obtuse: racemes dense, 1 or 2 inches 

 long, the peduncles equalling or exceeding the leaves; pedicels a line or two long : 

 upper calyx-lip scarious, very short or truncate : petals light or dark blue, 3 to 5 

 lines long : pod 3 to 5 lines long : seed about a line broad. — Bot. King Exp. 53, 

 t. 7, & Proc. Am. Acad. viii. 539. 



From Northwestern Nevada to Arizona ; probably in California eastward of the Sierra Nevada. 

 The ovules and seeds are rarely three or four. Very variable in habit, amount of pn t •< n . 

 size of the flowers, &c. A slender and caulescent villous form much resembles L. Sileri, Wat- 

 son, of S. Utah and S. Colorado, which is distinguished by the nearly equal herbaceous lips of the 

 calyx. 



§ 3. Flowers axillary, solitary : sides of the standard scarcely reflexed : heel nearly 

 straight : pod ovate : ovules 2. — LrjpiNELLUS, Watson. 



44. L. uncialis, "Watson. Annual, less than an inch high, diffusely branched, 

 very leafy, villous: leaflets 5, cuneate-oblong, 2 lines long, obtuse: peduncles equal- 

 ling the leaves or shorter : calyx not bracteolate, the upper lip deeply cleft : petals 

 ochroleucous, 1A lines long; the standard shorter, obovate, acute; the keel not 

 beaked, obtuse: pod two lines long. — Bot. King Exp. 54, t. 7, & 1. c 



On rocky hillsides near the Big Bend of the Truckee in Northwestern Nevada. 



5. TRIFOLIUM, Linn. CLOVBB. 



Calyx 5-cleft, with nearly equal teeth, persistent. Corolla withering and persist- 

 ent ; claws all more or less adnate to the staniineal tube, or the oblong or ovate 

 standard sometimes free : wings narrow; keel short, obtuse. Stamens usually dia- 

 delphoiis; anthers uniform. Style filiform. Pod small and usually enclosed in the 

 calyx, membranaceous, indohiscent, or dehiscent at the ventral suture, I 6 aeeded. 

 — Herbs; leaves palmately compound, with 3 or rarely 5 to 7 usually toothed 

 leaflets; stipules adnate to the petiole; flowers in capitate racemes, spikes or um- 

 bels, rarely few or solitary; peduncles axillary or only apparently terminal. — 

 Watson, Proc Am. Acad. \i. 127. 



