400 COMPOSITE. 



heavy-scented : leaves linear, or the lower spatulate, with slenderly 

 decurrent base: involucres small, ovate, bright white; bracts ovate or 

 oblong, obtuse. — Hillsides of both Coast Range and Sierra. July- 

 Sept. 



4. a. Cliilense, Spreng. Syst. iii. 480 (1826): G. Sprengelii, H. & A. 

 Annual and biennial, etoutish, \^'1% ft. high, cymose-corymbose at 

 summit: leaves lanceolate, more thinly floccose than in the last, the 

 short decumbent leaves rather broad: involucre hemispherical, with a 

 greenish-yellowish tmge; bracts thin, oval or oblong, obtuse. Var. 

 coiifertifolium, Greene. Very stout and low: leaves linear, densely 

 clothing the stem up to the sessile dense cluster of heads. — Very common 

 and variable; the variety biennial; both flowering at almost all seasons. 



-1— H^ Involucre embedded in loose wool. 



5. G. paliistre, Nutt. Trans. Am. Phil. Soc. vii. 403 {1841). Low 

 branching annual, floccose with long wool: leaves spatulate to oblong 

 and lanceolate: heads glomerate, leafy-bracted, a line high: tips of 

 linear involucral bracts white, obtuse. — In low moist lands. May — Aug. 



* * Pappus-bristles united at base, deciduous in a, ring. 



6. a. purpureuui, Linn. 8p. PI. ii. 854 (1758). Biennial, simple or 

 branching, erect or decumbent, (J — 10 in. high, canescent with a dense 

 coating of close wool: leaves spatulate, obtuse, usually becoming glabrate 

 and green above: heads crowded in an elongated more or less inter- 

 rupted spiciform inflorescence: involucre brownish: achenes sparsely 

 scabrous. — In open grounds. March— May. 



3(>. FILAGO, To'urnefort. Erect rather slender floccose-woolly herbs, 

 with alternate and entire leaves, and small heads in capitate lateral and 

 terminal clusters. Rays 0. Receptacle plane, hemispherical or sub- 

 conical; its naked summit bearing both sterile and fertile flowers having 

 a pappus of capillary bristles. Base of receptacle bearing pistillate 

 flowers, the achenes from these being destitute of pappus and enfolded 

 by a concave bract. Achenes terete or slightly compressed, sometimes 

 roughish-papillose. 



1. F. Californica, Nutt. Trans. Am. Phil. Soc. vii. 405 (1841). A 

 span high or more: heads ovate, slightly angular: convex: pistillate fl. 

 8_10, their bracts broadly ovate, deeply boat-shaped, incurved; inner 

 bracts oblong, concave: achenes almost terete, obscurely papillose- 

 granular. — Dry hills. May. 



