LEGUMINOS^. 27 



Loja. Giorn. Bot. Ital. xv. 194 (1883). Erect or ascending, stoutish, 

 1 — II3 ft. high, often flexuous and repeatedly dichotomons : pubescence 

 longer than in the last, more spreatling : stipules broadly ovate, with a 

 short subulate point ; leaflets cuneate-obovate or oblanceolate, the ujjper 

 acute, ?4 in. long, sharply denticulate : heads long-peduncled, ovate- 

 conical, '^i — 1^ in. high : calyx-teeth setaceous, densely hairy, equalling 

 the red-purple corolla : pod with close elevated striae. — Plentiful on 

 plains of the interior, from Vacaville, Jepson, to Antioch, Greene, and far 

 southward. In so far as Hooker and Arnott's description goes, it accords 

 with the plant first perfectly described by Lojacono under a new name. 

 It is a p irticularly well marked species in the character of its pods. 



19. T. ainoeuuin. Commonly 2 ft. high, stout, simple or with few 

 branches from the base, the heads 1-3, terminal and subterminal, herbage 

 canescently villous : stijjules lanceolate to obliquely broad-ovate with a 

 setaceous or triangular acumination ; leaflets broadly obovate, refuse or 

 obtuse, erose-denticulate. 1 in. long or more, 10 lines broad : heads 

 globose, in age oval, 1^2 iii- high : calyx-teeth linear-setaceous, pl^^mose 

 throughout, 3 — 4 lines long, much shorter than the very showy corolla ; 

 this light rose-purple with dark centre. —At Vanden Station on the Sacra- 

 mento plains, Greene ; also at Little Oak, Solano Co., in the same general 

 region, Jepson. By far the largest and handsomest of the annual clovers 

 of middle California ; plentiful in its locality. It has been distributed 

 for T. (JirJiolniinnii, but wrongly. May. 



20. T. colnnibinnm, Greene, Pittonia, i. 4 (1887). Erect, nearly simple, 

 1 ft. high, somewhat silky-pubescent : leaflets 1 in. long, cuneate-oblong, 

 obtuse, crenulate-denticiilate : head ovate-conical, 1 in. high : calyx-tube 

 less than 1 line long : the filiform segments 5 lines, soft and silky-plumose 

 throughout, deeply concealing the minute piirple corolla : pod striate, 

 villous at apex. -Common about Yacaville ; readily known by its pale 

 dove-colored heads altogether soft and silky, exhibiting no flowers, but 

 seemingly made up of the long, densely plumose calyx-teeth. May. 



21. T. olivaceuiii, Greene, 1. c. Simple or branched from the base, 

 1-1 ft' ft. high, glabrous except an appressed pubescence on the lower 

 face of the leaves : petioles 1-2 in. long, with lanceolate acuminate 

 entire stipules ; leaflets as in the last, but somewhat serrulate : heads on 

 long slender peduncles, hemispherical in flower, 1 in. or more broad and 

 high : calyx-tube 1 line long ; the linear-setaceous teeth 5—6 lines, 

 densely plumose toward the base only, gradually less so above, nearly 

 naked at the rather rigidly setaceous tips ; corolla deep violet-purple, 

 very small and concealed : pod striate, glabrous. — With the preceding, 

 but more common ; readily distinguished by its large olive-green heads. 



22. T. ABVENSE, Linn. Sp. PI. 769 ( 1753 ). Belated to the last two, liut 



