54 UNITED STATES AND MEXICAN BOUNDARY 



Melilotus pae\t:flokA3 Desf. ; Torr. d Gray^ I. c. M. occidentalism Nutt. I. c. Western 



jxas. Chihuahua^ Sonora and California, April — May, Introduced from Europe. 



Tkifolium fimbriatum, Lindl. Bof. Beg. t 1070; Torr. & Gray, FL 1, p. 317. Near San 



May ; Pai 



San Isabel in the same State ; Thurher. All our 



specimens of this plant are clothed with a minute glandular pubescence. The leaflets are 



lanceolate or oblong-lanceolate^ and conspicuously 



ti narrow spinulose serratures. 

 base. Legumes 2-seeded. The 



Indians of California collect the seeds for food. 

 Trifolium nETERODON, /9. ToTT. & Gray, Fl 



Monterey^ California, May ; Parry 



Differs from the preceding in being: glabrous, withoblongr or obovate leaflets: the 



subulate from 



and 



the legumes 4 — 5-seeded. 



Trifolium spinulosum, /?. Torr. & Gray^ L c. Near Monterey, California, May; Parry. 



Near the last, but distinguished by the entire teeth of the calyx, more laciniate stipules and 2- 

 seeded legumes, From T. fimbriatum it differs in being glabrous, and in the much longer and 

 narrower calyx-teeth. 



Trifolium Macr^i, HooTc. dArn. Bot Misc. 3,^, 179. T. albo-purpureum, Torr. d Gray^ Fl. 



l,p. 319. Santa Barbara, California, April; Parry. 



Trifolium tridentatum, LindL Bot. Beg. sub t. 1070. T. involucratum, Torr. d Gray, I. c. 

 non Willd. Santa Barbara, California ; Parry. 



Trifolium INVOLUCRATUM^ Willd. 8p. 3, p. 1372; Gray, PI. Wright. 2, p. 41. Hills at the 



)pper Mines and along the Mimhres, New Mexico 

 TRiroLiUM Bejariense, Moricand, PI. Nouv. Amt 

 TRiFOLiuivt rucATUM, Lindl. Bot. Bea. t. 18R3 : 5 



le ; Bigeloio. Mahibi, Sonora ; Tlmrher, 

 1,t. 2. Western Texas, April ; Wright. 

 &, Gray, I. c. T. phyaopetalum, Fisch. 



d Mey. Ind. Sem. St. Petersh. 1837, p. 18. Santa Barbara, and on the beach San Juan 

 Capristano, California, March — May ; Parry. San Isabel ; Thurher. As tout species, easily 

 distinguished by its very large head, and broadly lanceolate entire segments of the involucre. 



Trifolium amplectens, Torr. dt Gray, I. c. 1, p. 319 ; Hook. & Am. Bot. Beech, p. 330, t. 78. 

 San Fernando and San Luis Obispo, California ; Parry. 



Trifolium variegatum, Nutt. in Torr. d Gray, Fl. 1, p. 317, Sonora, June ; Thurher. 



Trifolium microcbphalum, Pursh, Fl 2, p. 478 j Torr. dt Gray, I. c. San Diego, California, 

 May ; Thurher. 



HosACKiA OBLONGiFOLi A , Benth. PI. Hariio. p. 305. Mountains east of San Diego, California, 

 June ; Parry. Resembles H. bicolor, but differs in being pubescent, and In the narrowly 

 oblong acute leaflets, as well as in other characters. The legume is straight, about an inch 

 and a quarter long, and scarcely two lines wide. I have never seen H. bicolor with bracts, but 

 in this species there is always a unifoliate bract to each head of flowers. 



HosACKiA gracilis, Benth. in Linn. Trans. 17, p. 365 ; Torr. d Gray, Fl. J, p. 323. (Tab. 

 XY.) Monterey, California, May. A rare species which we have received only from the 

 vicinity of Monterey. It has much the appearance of a depauperate state of H. bicolor. The 

 petiolate trifoliate bract is always present. 



HosACKiA STRIGOSA, Nutt. in Torr. & Gray, I.e. H. rubella, Nutt. I. c. Near Santa Barbara, 

 California, March ; Parry. Annual. Stem branching from the base : the branches 3—4 



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