128 LEGUMINOS^E. Trifolium. 



reflexed, half an inch long, " white " : calyx very villous ; its teeth straight and 

 equalling the corolla: ovary smooth, 4-ovuled. — Hook. Fl. i. 130, t. 49. 



In Oregon and Central Idaho (Douglas, Nuttall, Spalding), but not yet detected in California. 



6. T. longipes, Nutt. Erect or ascending, slender, about a span high : stem 

 usually glabrous, the leaflets and calyx sparingly villous : stipules mostly narrow, 

 entire or toothed ; leaflets narrowly oblong to linear, usually very acute, about an 

 inch long, serrulate : flowers spicate or very shortly pedicellate in smaller and less 

 dense ovate heads, at length usually reflexed, 5 or G lines long, ochroleucous or 

 tinged with purple : calyx-teeth straight, more or less hairy, shorter than the corolla : 

 ovules 2 to 4. — Torr. <& Gray, Fl. i. 314. 



Var. latifolium, Hook. Leaflets broader : flowers obviously pedicellate, in 

 loose heads : stems often low. — Lond. Jour. Bot. vi. 209. Var. pygmceum, Gray, 

 Bot. Ives Colorado Exp. 9. 



Moist meadows in the Sierra Nevada, from Yosemite Valley and above Mono Lake to the Brit- 

 ish boundary, and east to the Eocky Mountains. The variety sometimes takes on the aspect of 

 T. repens, but the calyx is always hairy and the teeth slender. 



T. pratense, Linn. (Red Clovek.) Stems ascending, somewhat hairy : stipules bristle- 

 pointed ; leaflets oval or obovate, obtuse or emarginate : heads large, ovate, sessile : calyx-teeth 

 lax, shorter than the corolla : ovules 2. — Native of the Old World, extensively cultivated, and 

 perhaps the most valuable species of the genus. It belongs to a cooler and moister climate than 

 ours, but is cultivated in some parts of the State. There are several varieties, differing chiefly in 

 size and time of flowering. 



* t Glabrous throughout : calyx-teeth subulate, rigid, contorted, twice longer than the 



tube : flowers sessile : stipules lanceolate, acuminate. 



7. T. altissimum, Dougl. Erect, stout, a foot high or more : stipules very 

 long, toothed ; leaflets narrowly oblanceolate, very acute, two inches long, strongly 

 veined, the veins excurrent : flowers in dense oblong or ovate spikes, at length 

 somewhat reflexed, 6 to 8 lines long, red : lower calyx-tooth straight, the rest curved 

 or twisted downward : ovary smooth, 2-ovuled. — Hook. Fl. i. 1 30, t. 48. 



Mountains of Oregon and Central Idaho ; to be looked for in Northern California. 



* -ft * Glabrous throughout : calyx-teeth scarcely longer than the tube : stiptdes mostly 



ovate, acute, entire : flowers on very short pedicels, at length reflexed. 



8. T. Beckwithii, Brewer. Stems stout, ascending, a foot high or more : stip- 

 ules lanceolate to ovate ; leaflets oblong to oblanceolate, obtuse or acute, serrate, 1 

 or 2 inches long : flowers on very short pedicels, 7 to 9 lines long, in large dense 

 globose heads, red : calyx-teeth linear-subulate, straight, equalling the tube : ovary 

 smooth, 2-6-ovuled. — Watson, Proc. Am. Acad. xi. 128. T. altissimum, Torr. & 

 Gray in Pacif. R. Eep. ii. 120. 



In the northern Sierra Nevada (Beckwith) ; Sierra Co. (Lemmon) ; Humboldt Valley, Nevada 

 (Gray) ; Snake Country, Burke. Perhaps a large and stout form of the next. • 



9. T. Kingii, "Watson. Eesembling the last, but smaller and more slender, with 

 smaller heads, and usually acuter leaflets : rhachis often produced above the head, 

 with a few spinescent bracts : flowers 4 to 7 lines long, rose-colored or purplish : lower 

 leaves (as in other species) often rounded or obovate. — Bot. King Exp. 59. T. Hay- 

 deni, Porter in Hayden Eep. 1871, 480. 



In the Sierra Nevada, at Summit (Bolander) and Sierra Co. (Lemmon), and in the mountains 

 eastward to Montana and Utah. 



10. T. Bolanderi, Gray. Cespitose, small, the short stems decumbent : leaflets 

 obcordate to cuneate-oblong, half an inch long or less, very finely reticulated, slightly 

 serrulate : peduncles slender, elongated, occasionally axillary : heads small ; the 

 purplish flowers few, 3 or 4 lines long : calyx-teeth lanceolate, scarcely equalling 

 the tube : ovary smooth, 2-ovuled. — Proc. Am. Acad. vii. 335. 



