Wet meadows, wet sandy stream and river banks, and hillsides, Ariz. (Gila and 

 Pinal COS.), Apr.-May; Mont, to B. C, s. to Ariz, and Baja Calif. 



2. Trifolium fragifenim L. Strawberry clover. 



Perennial; stems branching, creeping and rooting at nodes, glabrous or nearly 

 so; petioles long; leaflets 6-30 mm. long, obovate, finely serrulate to subentire, 

 glabrous or sparingly long-hairy at base; peduncles 8-15 cm. long, exceeding the 

 leaves; head 1-1.4 cm. wide in anthesis, globose, with an involucre; calyx 3-4 

 mm. long, silky-hairy, the slender teeth about as long as the tube, becoming 

 much-inflated in fruit to increase the size of the head 2 or 3 times, becoming 

 reticulate-veined and often reddish-tinged; corolla 5-7 mm. long, pink to rose- 

 color; fruit 1 -seeded. 



In wet meadows and marshes, in N. M. (San Juan and San Miguel cos.), 

 June-Aug.; introd. from Euras. and N.Afr., now widely spread. 



3. Trifolium pinetonim Greene. 



Perennial; stems slender, reclining, glabrous, much-branched, to about 6 dm. 

 long; petioles slender, several times as long as the leaflets; stipules narrow, atten- 

 uate, entire or nearly so; leaflets obovate to elliptic-oblong, rounded or obtuse 

 at apex, cuneate at base, bright-green, glabrous, prominently veined with the 

 veins slightly prolonged beyond the low teeth; peduncles slender, 4-6 cm. long, 

 nearly glabrous but with a few long crinkled hairs, often tomentulose just below 

 the often few-flowered head; involucre short but distinct, one-third to one-half 

 as long as the flowers, composed of linear-lanceolate subulate bracts free almost 

 to their bases; calyx one-half to two-thirds as long as the corolla, the linear- 

 subulate teeth almost twice as long as the tube; corolla pale-purplish, to about 

 1 1 mm. long, the banner emarginate. T. longicaule W. & S. 



In wet meadows, muddy seepage, edge of pools and along streams in N. M. 

 (Lincoln and Otero cos.) and Ariz, (widespread in mts.), June— Oct. 



4. Trifolium Wormskjoldii Lehm. 



Glabrous taprooted perennial with decumbent-based and often rhizomatous 

 stems 1—8 dm. long; stipules 1-4 cm. long, lacerate-margined and usually acumin- 

 ate; leaflets 3, linear-elliptic to oblong-obovate, 1-3 cm. long, finely serrulate; 

 heads involucrate, axillary, 2- to 60-flowered, 2-3 cm. broad; involucres flared, 

 from as much as 2 cm. broad and lacerately 8- to 12-lobed to shallowly lobed 

 or toothed with the lobes entire; peduncles 3-11 cm. long; heads nearly globose, 

 15-25 mm. thick; flowers 10-18 mm. long, erect or spreading, reddish to purple, 

 often white-tipped; pedicels 0.5-2 mm. long; calyx glabrous, two thirds to three 

 fourths as long as the corolla, the tube 10-veined, about equaled by the 5 sub- 

 equal narrowly lanceolate-acicular (occasionally bifid) teeth; legume 1- to 4- 

 seeded. T. Willdenovii Spreng. 



Wet meadows, stream beds and banks, in mts. of w. Tex. (Jeff Davis Co.), 

 N. M. {Hitchcock, et al.) and possibly Ariz., May-Sept.; Ida. to B. C, s. to 

 N. M., Calif, and Mex. 



5. Trifolium Fendleri Greene. Fig. 498. 



Perennial from slender roots; stems not fistulose, mostly erect, to 5 dm. tall, 

 glabrous, longitudinally striate; leaves long-petioled, glabrous, bright-green; leaflets 

 mainly elliptic to oblanceolate or (in the lower leaves) obovate, usually less than 

 3 cm. long, sharply denticulate to serrulate; stipules broad, oblong-lanceolate to 

 ovate, deeply and sharply toothed to laciniate; peduncles normally glabrous; 

 heads 2-4 cm. wide, more than 10-flowered, globular, borne above the leaves, 

 involucrate; involucral bracts not foliaceous, relatively broad and deeply cleft 

 with setaceous teeth, in a whorl and more or less united about a third their length 



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