2gS Mulilenbercria, Volume 2 



Trifouum microckphalum Piirsh, Fl. Am. Sept. 2: 478. 1814. 

 No. 8507, collected May 7, on the hills west of Los Gatos, 

 Santa Clara county, in orchards. It is a species of fields and 

 waysides, nsnally in gravelly .soil, widely distributed over the 

 western half of the country in various forms. These specimens 

 are large and luxuriant, the procumbent branches over a foot in 

 length, but sometimes it is depauperate, only two or three inches 

 high. The type was collected by Lewis "on the banks of Clark's 

 River" in Montana. 



Trifolium melananthum H. & A. 



No. 8504, collected May i, in wet gras.sy places in the pine 

 woods back of Pacific Grove, Monterey county. This is a small 

 form, .som^e of the plants only three inches high, but near at 

 hand were larger plants of normal size with connecting forms. 

 The type was probably obtained in this vicinity, near Monterey. 



Trifolium petropliiliim 



Annnal: stems simple or nearly so, i dm. high, pubescent 

 with short white more or less appressed hairs, leafy but the leaves 

 scattered: stipules 6 or 7 mm. long, all with an attenuate acumi- 

 nate tip occupying about half the length, the lowermost with a 

 rather narrow obliquely lanceolate base, this becoming broader, 

 in the uppermost about 3 mm. wide, all somewhat membranous, 

 pubescent like the stems: lowermost leaflets obovate-cnneate, 

 4 mm. long, 2 mm. wide, sharply serrate-dentate, prominenth- 

 veined, pubescent like the stems; leaflets of the middle part of 

 thestem more nearly. elliptical, 6 mm. long 2 mm. wide, more 

 pubescent, the uppermost ones linear, 8 mm. long, less than 2mm. 

 wide and still more pubescent: peduncles short, i to 3 cm. long; 

 heads somewhat obovoid in shape, i cm. high and about as broad 

 across the top, without involucre: calyx 8 mm. long, the tube 

 only 2 mm. long, densely villous, lo-nerved, the lobes .setaceous, 

 beautifully plumose: corollas purple, i cm. long, very slender, 

 less than 2 mm. across: banner infolding the other parts of the 

 flower, oblong when spread out, 3 mm. wide up to the middle, 



