PEA FAMILY. 811 



subulate, exceeding the tube, the lower much longer; legume sub- 

 sessile. — Higher ground than the species. Var. viresckns (T. 

 virescens Greene). Smaller plant in every way; two upper calyx- 

 teeth shorter than the tube, the lower twice longer. — Hill country 

 in dry or substerile soil. Var. Gambbllii (T. Gambellii Nutt.). 

 Lower calyx-teeth cleft into setaceous segments. — Inner South Coast 

 Eanges. 



20. T. amplectens T. & G. Branches several to many from the 

 base, mostly diffuse with decumbent or ascending slender branches, 

 3 to 12 or 15 in. long, glabrous throughout; leaflets oblong-obovate, 

 obtuse, truncate or retuse, cuneate at base, serrulate (mostly towards 

 the apex) and mucronulate, 5 to 8 (or the lowest 2 to 4) lines long; 

 heads 2 to 4 (in fruit 4 to 6) lines in diameter; peduncles longer than 

 the leaves, mostly twice longer; bracts of the involucre 5 to 7, ovate 

 or oblong, J to IJ lines long, commonly entire, but sometimes toothed, 

 strongly nerved; calyx-teeth subulate; corolla red-purple or whitish, 

 in age inflated and ovate or obpyramidal; pod usually 2-seeded; seeds 

 J to J line long, emarginate at the hilum, sinuose-rugose. — (T. 

 tranciscanum Greene.) 



A frequent species from the plains of the Sacramento and San 

 Joaquin (especially common in low or alkaline areas), westward 

 through the Coast Range hills to the coast. Apr. Doubtless several 

 worthy varieties could well be named and described, but this species is 

 far less variable than might be supposed from the number of invalid 

 species whicli have been separated from it. When inhabiting dry, 

 especially adobe soil, the plants are often semi-dwarf, and correspond 

 to the type; on high ground the stems are more commonly wiry and 

 prostrate, in low grounds flaccid and not so slender. Even the rank 

 forms of low ground sometimes show scarious-margined involucres 

 and toothed lobes as in the type. Var. hydrophiltjm (T. hydro- 

 philum Greene). Lower leaves narrower than the upper; involucral 

 lobes only J line long; calyx-teeth aristiform; inflated corolla oblong. 

 — A rank form found near marshes and ponds, Alameda, etc. The 

 number of involucral lobes and seeds is not peculiar. Connects 

 with the next. 



21. T. depauperatum Desv. Slender, ascending, 3 to 6 in. high, 

 glabrous; stipules ovate, acuminate, entire; leaflets cuneate-oblong, 

 acute or obtuse or emarginate, J in. long or les.«, denticulate; heads 

 3 to 10-flowered, long-stalked; involucre greatly reduced to very 

 small truncate lobes or a minute ring; calyx short with narrowly 

 subulate teeth; corolla white or purple, inflated, oblong, 2 to 3 lines 

 long; ovules 2 to 6; pod 1 or 2-seeded, rugose. 



Not very common: hills and plateaus of the Mayacamas Eange 

 bounding ISTapa Valley on the east; Alameda. May. 



Var. ANGTrsTATtrM (Greene under T. laciniatum). Leaves all 

 linear, often truncate, entire or nearly so, J in. long; involucre 

 reduced to a mere ring. — Sonoma; Upper Napa Valley. 



Var. LACINIATUM (T. laciniatum Greene). Lower leaflets narrowly 

 cuneate, denticulate, the upper broad, truncate, 3-dentate at apex. 



