94 LEGUMINOS*. 



22. L. Biolettii, Greene. Slender, the somewhat wiry prostrate 

 branches 1 — 2 ft. long: herbage cinereously or canescently pubescent with 

 short appressed hairs: leaflets usually 4, cuneate-obovate, obtuse, 2 — 5 

 lines long: umbels on slender peduncles little surpassing the leaves, 

 unifoliolate-bracted, 6— 10-flowered: calyx a line long or less, narrowly 

 funnelform, the triangular pointless teeth a third as -long, erect: corolla 

 2 lines long, yellow, turning dark-red: pod strongly arcuate, slender- 

 braked. — Dry ridges above Mill Valley, Marin Co. 



-h- ■*- Annuals. 



23. L. eriophorus, Greene. The numerous branches a foot or two 

 long, flexuous, weak and prostrate: pubescence, dense, somewhat tomenlost: 

 leaflets 5 — 7, obovate or cuneate-oblong, acute, 3 — 6 lines long: umbels 

 short-peduncled or subsessile, bracted: fl. 3 — 4 lines long; calyx half as 

 long, very villous; the filiform teeth about equalling the tube. — In 

 sandy grounds near the sea, from San Francisco southward. 



24. L. Heermani (Dur & Hilg.), Greene. 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. TEIFOLIUM, Pliny (Clover). Herbs with palmately (in one 

 pinnately) 3-foliolate leaves and adnate stipules; leaflets commonly 

 denticulate. Flowers in roundish or ovoid or somewhat depressed cap- 

 itate or umbellate clusters, on 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 calyx, 1 — 6-seeded, dehiscent or indehiscent. 



* Heads or spikes not involucrale. 

 -f— Flowers pedicellate, at length reflexed; calyx-teeth subulate, not plumose. 



1. T. gracilentum, Torr. & Gray. Erect, slender, 1—2 ft. high, 

 wholly glabrous: stipules ovate- or linear-lanceolate, acuminate : leaflets 

 cuneate-obcordate, spinulose-serrulale, % in. long: heads 15 — 25-flowered: 

 calyx-teeth lanceolate-subulate, setaceously acuminate, thrice as long as 

 the tube, shorter than the usually deep reddish corolla: pod exserted, 

 2-seeded: seeds obliquely oval, straw-colored, very smooth. — Open plains 

 and hillsides. April — June. 



2. T. bifldnm, Gray. Erect, very slender, 1 ft. high, pale green and 

 glaucous, the petioles and calyx more or less pilose-villous : stipules 

 ovate-lanceolate, entire, setaceously acuminate: leaflets linear-cuneale, 

 the sides remotely toothed, apex bifid and mucronulate: peduncles slender, 

 exceeding the leaves: heads 6— 15-flowered : calyx deeply 5-parted, the 



