SUNFLOWER FAMILY. 459 



A. Pappus-bristles united at base, falling away in a ring. 

 Inflorescence spike-like; leaves white-woolly beneath, green above 1. G. purpureum. 



B. Pappus-bristles not united at base, falling separately. 



Involucre imbedded in loose wool, its scarious-tipped bracts rather inconspicuous and dull 



colored ; low branching annual 2. G. palustrc. 



Involucre woolly only at base, its bracts mainly scarious or silvery. 



Herbage in age becoming green (at least the upper surface of the leaves), more or less 

 glandular. 



Inflorescence corymbose; bracts pearly white; herbage balsamic-scented 



3. G. decurrens. 



Inflorescence paniculate; bracts white or rose-tinged; herbage sweet-scented 



4. 6". ramosissimum. 

 Herbage persistently \foolly, not glandular or scarcely so. 



Involucre bright white; inflorescence paniculate 5. G. microcephalum. 



Involucre greenish yellowish, becoming rusty; heads in capitate clusters or the 

 clusters somewhat open-paniculate 6. G. chilense. 



1. G. purpureum L. Purple Cudweed. Stems commonly simple and erect 

 from a slightly decumbent base, 4 to 12 in. high; herbage canescent with a 

 close dense coating of white wool, the upper surface of the leaves usually early 

 glabrate; leaves broadly spatulate, obtuse, 1 to 2 in. long and 7 lines wide or 

 less; heads crowded in a spike-like inflorescence which is dense and oblong, 

 or more elongated and more or less interrupted; heads 2 lines long; involucre 

 brownish or purplish; achenes sparsely scabrous. 



Open ground, frequent: Napa City; Sausalito; Fish Eanch, Contra Costa 

 Co.; Berkeley; San Francisco, Sierra Nevada. Annual or biennial. 



2. G. palustre Nutt. Lowland Cudweed. Annual, branching from the 

 base, 3 to 8 in. high, erect or ascending; herbage loosely floccose with long 

 wool, more or less deciduous from the leaves; leaves nearly all spatulate, or a 

 few about the clusters of heads oblong or lanceolate, less than % in. to 1 in. 

 long; heads in small clusters at the ends of the branches, 1 to iy 2 lines high; 

 bracts of the involucre linear, with white obtuse often denticulate tips. 



Common in stream beds and low lands: Coast Ranges; Sacramento Valley; 

 San Joaquin Valley; Sierra Nevada; Southern California. East to Wyoming 

 and north to Washington. Var. nanum Jepson. Dwarf, 1 to 2y 2 in. high; 

 bracts acute. — Dry wooded hills, in open places: St. Helena. 



3. G. decurrens Ives var. californicum Gray. California. Everlasting. 

 Biennial; stem stoutish, 2 or 3 ft. high, corymbosely branched at summit, the 

 branches bearing glomerules of large heads and forming a broad and some- 

 what flat-topped inflorescence ; herbage soon becoming green and more or 

 less glabrate (except on the under surface of the leaves), at maturity glandular 

 and balsamic-scented; lower leaves oblong (% to 1 in. broad, and 2 to 5 in. 

 long), diminishing in size upwards and becoming lanceolate, all obviously de- 

 current; heads roundish or broad, 3 lines high or slightly more, the involucral 

 bracts white or in age rusty-tinged. 



Dry wooded hills of the Coast Ranges: Lake Co.; Napa Range; Oakland 

 Hills and southward to Southern California. May-July. 



4. G. ramosissimum Nutt. Pink Everlasting. Biennial, 2 to 5 ft. high, 

 the stems one to several from the base, ending above in a much branched 

 panicle which is often narrow and sometimes virgate and frequently more than 

 1 ft. long; herbage glandular and very sweet-scented; leaves at length green 

 on both faces, the stem more or less arachnoid; heads narrowly ovate or 

 turbinate, 2 lines high, reddish or pinkish. 



Wooded hills near the coast: Mt. Tamalpais; Oakland Hills and southward 

 to Southern California; also in the Sierra Nevada. July-Sept. 



5. G. microcephalum Nutt. White Everlasting. Biennial; stems often 



