CHRYSOPSIS CHRYSOTHAMNUS 265 



flat to hemispheric without chaff, involucre hemispheric, bracts imbricated 

 in several rows ; heads usually solitary on long stalks ; leaves alternate, 

 coarsely toothed or cut; annual or perennial. 

 Stems 1-3 ft. high; stem-leaves linear-spatulate, 1-3 in. 



long ; rays 20-30 C. leucdnthemum 



CHRYSOPSIS Nuttall 1818 GOLDEN EYE, GOLDEN ASTER 



(Gr. chrysos, golden, opsis, look, from the color) 



PL 38, fig. 7. 



Heads with yellow pistillate ray-flowers, disk-flowers yellow, usually 

 perfect, achenes flattened, linear-oblong to obovate, pappus double, inner 

 row of hair-like bristles and the outer of smaller scales or bristles; re- 

 ceptacle flat, without chaff, involucre hemispheric to bell-shaped, the bracts 

 imbricated in several rows; heads solitary or corymbose on the branches; 

 leaves alternate, sessile, entire or toothed; perennial. 

 Stems 4 in. to 2 ft. high ; leaves lance-linear to spatu- 

 late or nearly ovate, 1-8 cm. long, bristly, shaggy, 

 hairy or sticky ; heads 1-2 cm. wide, sessile or vari- 

 ously stalked C. villosa 



CHRYSOTHAMNUS Nuttall 1840 GOLDEN BUSH, FALSE 



GOLDEN ROD 

 (Gr. chrysos, golden, thamnos, bush) 



Heads without rays, the disk-flowers yellow or cream-colored, perfect, 

 achenes oblong to ovoid, pappus of hair-like bristles; receptacle without 

 chaff, involucre oblong to cylindric, the bracts imbricated in several rows, 

 often in distinct vertical ridges, usually stiff and papery ; heads in racemes, 

 panicles or cymes; leaves alternate, entire, spatulate to linear; shrubs, or 

 becoming shrubby. 



1. Bracts more or less long-pointed 

 a. Achenes hairy ; bracts not in ridges 



(1) Outer bracts long-tapering, some usually 

 exceeding the flowers, and leaf-like; 

 heads in a long leafy spike- or raceme- 

 like cluster 



(a) Heads 10-15-flowered; bracts about 12; 



leaves lance-linear C. Pdrryi 



(b) Heads 5-flowered; bracts 15-18; leaves 



narrowly linear C. Howardii 



