32 LEGUMINOSiE. 



high, decumbent or prostrate, branching, sparsely villous : stipules entire 

 or slightly toothed : leaflets obcordate to oblanceolate, 1—4 lines long, 

 mostly retuse, mucronate-dentate : peduncles equalling the leaves : invo- 

 lucre minute, 1 4-flowered : Q. }^ in. long, yellowish white with piirple 

 centre. — Common in the higher Sierra from Kern Co., Palmer, to Lassen's 

 Peak, Lemvioit. — A diminutive perennial, with which the 1-flowered state 

 of T. variegaiu)n has been confused, perhaps from the first ; and Marcus 

 Jones, in proposing T. mullicaide may have taken the latter for the true 

 T. monantlmm, which Dr. Gray described as probably annual ; but it is 

 strictly perennial. The flowers are twice or thrice larger than in the 

 annual associated with it. 



++ -M- Itirolvcre cup-shaped ; floirers deielopirig equally all aroiutd. 



33. T. microcephalum, Pursh. Fl. ii. 478 (18M). Slender, much 

 branched, decumbent or procumbent, soft-pubescent : leaflets obovate- 

 cuneiform or obcordate, emarginate, denticulate ; stipules ovate-acumi- 

 nate, nearly entire : heads subglobose, very small, oo - flowered, on slender 

 peduncles ; involucre many-cleft, segments entire : calyx-teeth subulate ; 

 broad, scarious, and sometimes toothed at base : fl. minute, pinkish : pod 

 globose, 1-seeded.— Common in the Coast Eange, and on plains and hill- 

 sides eastward throughout the State. May. 



34. T. microdon, H. & A. Bot. Beech. 330, t. 79 (1840). Larger than 

 the last, not rarely 2 ft. high, glabrous or nearly so : involucre broader, 

 deeply ctip-shaped, equalling the head, its many lobes conspicuously 

 toothed : calyx-teeth rigid, triangular, aciite, serrulate below : corolla 

 minute, white.—Abundant in many places about the Bay of San Fran- 

 cisco ; also in the interior, and northward to Washington. May. 



35. T. cyathiferum, Lindl. Bot. Eeg. under t. 1070 (1827) ; Hook. Fl. 

 i. 133 t. 50. Erect or ascending, 3—15 in. high, glabrous, pale green : 

 stipules ovate, laciniate-toothed : leaflets obovate or oblanceolate, ig — 1 

 in. long : heads large ; involucre broad, saucer-shaped, thin, with short 

 many toothed and nerved lobes : calyx 5-nerved, membranaceous ; the 

 nerves excurrent into branching setaceous-spinose tips whicli equal the 

 small white corolla. — From Highland Springs, Lake Co. Simonds, and 

 near Cisco in the Sierra, Greene, northward. June— Aug. 



-)— -1— Corolla more or less iiijlaied i)i age. 



36. T. barbigerum, Torr. Pac. R. Rep. iv. 79 (1857). Branches many, 

 stout, with short internodes, nearly prostrate, 4—10 in. long ; herbage 

 deep green, soft-pubescent : petioles elongated ; leaflets broadly obovate, 

 obtuse, denticulate, % ^^- l^iig' o^ l^ss : involucre as broad as the long- 

 peduncled heads, 4 8 lines wide, shortly lobed and setaceously toothed : 

 calyx-tube short, thin and at length scarious ; teeth setaceous-awned, 

 plumose, sometimes 2 — 3-parted, usually exceeding the small purple 

 corolla : pod 2-seeded. — Frequent at Berkeley, San Francisco, etc. 



