100 LEGUMINOS.E. 



28. T. amplectens, Torr. & Gray. Light green and glabrous, small, 

 slender, the branches 310 in. long: leaflets % % in. long, cuneate- 

 obovate or -oblong, truncate or retuse, mucronately denticulate: pedun- 

 cles slender; involucre half as broad as the heads, its lubes broad, 

 scarious-margined, obtuse, sometimes cleft or toothed: calyx cleft -nearly 

 to the base, the subulate slenderly acuminate teeth very unequal, the 

 larger rarely toothed or cleft: corolla ochroleucous, 23 lines long: 

 pod membranaceous, translucent, finely reticulate with green veins, 

 promptly dehiscent by one suture only, 4 6-seeded: seed small, trans- 

 versely oval, emarginate at the hilum, coarsely tuberculate-rugose. 

 Not common; but found at Alameda, and in the Oakland Hills. 



29. T. hydrophilum. Diffuse, glabrous, the branches flaccid though 

 not very slender, 12 ft. long: stipules ovate, entire, subulate-pointed; 

 leaflets linear or oblong, obtuse or truncate, repandly dentate or somewhat 

 serrulate, 1 in. long: peduncles slender, little exceeding the leaves: 

 heads 8 15-flowered: involucre of about 5 small ovate or oblong bracts: 

 calyx-teeth very long, subulate-arisliform: corolla in age oblong, slightly 

 inflated and about equally so from end to end, conspicuously striate: pod 

 2-seeded: seed transversely oblong, sinuous-rugose. In low moist lands 

 along the seaboard, preferring the vicinity of the salt marshes; but also 

 around ponds among the hills, and even on subsaline plains of the lower 

 Sacramento. A most distinct species every way, and one which, having 

 its lowest leaves narrowest and its uppermost and later ones broadest, 

 reverses that order of leaf-widening which is otherwise universal in 

 Californian clovers. It is T. diversifoUum of the Flora Franciscana; 

 but Nuttall's species can not be identified by his meagre description, and 

 it is hardly probable that he had this plant in view. 



30. T. Franciscannm. Slender but wiry, the decumbent branches 

 5 10 in. long: leaflets linear-cuneiform, the very lowest entire, truncate 

 and cuspidate, the others serrulate and acute; filiform peduncles far 

 exceeding the leaves: segments of involucre oblong, obtuse; heads 

 small, hemispherical or subglobose: calyx-teeth short and subulate: 

 corolla red-purple, in age inflated to the broadly ovate. Var. truucatum. 

 Larger and more flaccid, the leaflets ampler, nearly all linear and 

 oblong-linear, truncate and scarcely toothed; heads larger: corolla 

 ochroleucous, the keel tipped with dark purple, the whole in age inflated 

 almost to the turbinate or obpyramidal Type common at San Francisco; 

 the variety abundant in Napa and Solano counties, etc. The two forms 

 comprise the T. stenophyllum of the Fl. Fr.; but that name is another of 

 Nuttall's nomina seminuda, and his description is more suited to the 

 variety next of the species. 



31. T. depanperatnm, Desv. Only a few inches high, branched 

 from the base, flaccid, decumbent, glabrous: leaflets }4 i n - long, cuneate- 

 oblong, obtuse or emarginate, denticulate : head long-stalked, few-flowered : 



