HELENIOIDE^. 205 



8. L. tenella (Nutt). Erect, sparingly branching, 46 in. high, 

 somewhat canescent with deciduous woolly hairs: leaves linear, entire, 

 or some of the lower laciniate: rays oval or oblong, short: palese and 

 awns each usually 2, but pappus not rarely wholly wanting. Low 

 plains of Contra Costa Co. April, May. 



9. L. nliginosa (Nutt.). Stouter than the last, freely branching, 

 often decumbent, somewhat flocculent: leaves linear-ligulate, the lower, 

 if any, entire, the upper laciniate-pinnatifid into linear entire or cleft 

 segments: involucral bracts and long-exserted rays. 10 13: pappus of 

 about 4 slender awns, and as many or twice as many broad truncate 

 laciniate-fimbriate palese. Common in low grounds. April, June. 



10.' L. microglossa (DC.). Slender, seldom 6 in. high, branching 

 from the base but erect: leaves entire, pubescent: involucre narrow and 

 nearly cylindrical: rays few, very short and inconspicuous: achenes 

 linear-fusiform, flattish, minutely and sparsely hispid; pappus of 2 4 

 rather rigid awned or awn-like scales, or in the ray sometimes none. 

 Valleys among the coast mountains southward. April, May. 



H- H Pappus usually present and uniform, of awned palese or 



paleaceous-dilated awns; leaves mostly entire. 

 ^Somewhat succulent; pubescence woolly, if any. 



11. L. platycarpha (Gray). Purplish-stemmed and very wiry, 5 8 

 in. high, with erect or ascending branches: leaves linear, or pinnatifid 

 into filiform segments: involucral bracts 6 or 7, 3-nerved, the middle 

 nerve carinately prominent: pappus-palex bright-white, ovate, slender- 

 awned, the awn as long as the achene. Subsaline plains of Solano and 

 Contra Costa counties. April, May. 



12. L. car uosa (Greene). Leaves all filiform, entire : bracts of invo- 

 lucre with a single strongly carinate nerve: pappus of 4 or 5 subulate- 

 awned ovate palese. Border of salt marsh north of Vallejo: rare or 

 local. April. 



M- -M- Not succulent; leaves entire; (except in n. 15) pubescence not woolly. 

 = Pappus invariably none,' achenes subclavate. 



13. L. chrysostoma (F. & M.). Hirsutulous, 1 ft. high more or less, 

 freely branching: leaves narrowly linear: head 34 lines high: bracts of 

 involucre, and the rays, 7 12, the latter 3 4 lines long: achenes gla- 

 brous. Rich fields and sunny slopes. April, May. 



14. L. macrantha (Gray). Perennial, stout and nearly simple, decum- 

 bent at base, with peduncles 4 8 in. long: leaves somewhat 3-nerved 

 and obtuse, linear, 4 8 in. long, hispid- ciliate toward the base: heads % 

 in. high and as broad: involucre of about 12 hirsute-pubescent thickish 

 herbaceous bracts: ligules ^ 34 in. long. Moist lowlands of western 

 Marin Co., and northward. June. 



