LEGUMINOS^. 23 



30. L. toineiitosus, Greene, 1. c. ; H. & A. Bot. Beech. 137 (1836), 

 imder Homckia ; Vogel, Liuurea, x. 591 (1836), under Syrmalinin. The 

 numerons braches a foot or two long, flexiioiis, weak and prostrate : 

 pubescence dense, somewhat tomentose : leaflets 5 — 7, ol)ovate or cuneate- 

 oblong, acute, 3 — 6 Hnes long : umbels short-peduncled or subsessile, 

 bracted : fl. 3 — 4 lines long ; calyx half as long, very villous ; the filiform 

 teeth about equalling the tidie. — In sandy grounds near the sea, from 

 San Francisco southward. 



31. L. Heeriiijiniii, Greene, 1. c. ; Dur. & Hilg. Pac. R. Rep. v. 6. t. 4 

 (1855), under Ilumckia. Near the last, but less pubescent, neither the 

 leaflets nor the flowers more than half as large, the leaflets broader and 

 rounded. -Same range as the last. 



10. TRIFOLIUM, Pliny (Glover). Herbs with palmately (in one 

 piunately) 3-foliolate (in a few 5 — 7-f oliolate) leaves and adnate stipules ; 

 the leaflets commonly denticulate. Flowers mostly very many, in round- 

 ish or ovoid or somewhat depressed capitate or umbellate clusters, on 

 more or less elongated axillary or terminal peduncles. Calyx 5-cleft or 

 -toothed. Corolla persistent ; banner and wings commonly coherent 

 with the stamineal tube ; keel mostly obtuse and shorter than the wings. 

 Stamens diadelphous. Pod concealed within or little exserted from the 

 <3alyx, 1— 6-seeded, dehiscent or indehiscent. — An extensive genus of well 

 known forage plants ; the Oalifornian species numerous ; those of our 

 district almost all annuals, flourishing between March and May. 



* Heads or spikes not involucrate. 

 H— Flo)i>ers pedicellate, at length reflexed ; calyx-teeth subulate, not plumose. 



1. T. Breweri, Wats. Proc. Am. Acad. xi. 131 (1876). Perennial, 

 slender, diffuse, 4 -12 in. high, sparsely pubescent : stipules lanceolate ; 

 leaflets mostly obcordate, toothed or serrulate, 1^4 — % in. long on slender 

 pedicels : calyx-teeth slender, much shorter than the whitish or pale 

 purple corolla. — Only at considerable elevations in the Sierra ; occupying 

 open places among subalpine forests. Jul. — Sept. 



2. T. grracileiitiiin, T. & G. Fl. i. 316 (1838) : T. denudatum, Nutt. PI. 

 Gamb. 152. t. 24(1848). Erect, slender, 1—2 ft. high, whoUy glabrous : 

 stipules ovate- or linear-lanceolate, acuminate : leaflets cuneate-obcordate, 

 spinulose-serrulate, ^^ in. long : heads 15 — 25-flowered : calyx-teeth lance- 

 olate-subulate, setaceously acuminate, thrice as long as the tube; shorter 

 than the dull but usually deep purple corolla : pod exserted, 2-seeded : 

 seeds obliquely oval, straw-colored, very smooth. — Open plains and hill- 

 ssides throughout western California. Apr. — June. 



3. T. bifidnin, Gray, Proc. Am. Acad. vi. 522 (1865). Erect, very 

 slender, 1 ft. high, pale green and glaucous, the petioles and calyx more 



