Bailey & Bailey: Woody Plants of National Parks 237 



Canyon village; trail from El Tovar to Yavapai Point. Canyon, abundant: Bright 

 Angel trail; Kaibab trail on both sides of the Colorado River; Phantom Ranch. 



2. Sticky Snakeweed (Gutierrezia Uicida Greene). — Straggling shrub 

 1 to I1/2 feet high; similar to broom snakeweed but with very sticky herbage; 

 stems only sparsely leafy; ray and disk flowers 1 to 3 each, the heads sur- 

 rounded by a very narrowly cylindric involucre. (Syns. Gutterrezia glomer- 

 ella Greene, G. microcephala (DC.) Gray.) 



Occurrence. — ziON : reported, grand canyon. North Rim: Powell Saddle. South 

 Rim: east of Grand Canyon Village. 



Rush Bebbia (Bebbia jimcea (Benth.) Greene). — Rounded bushy shrub 

 1 to 4 feet high, with almost leafless rush-like branches; leaves linear, I/2 to 1^2 

 inches long, alternate or the lower opposite; flowers yellow; ray flowers none; 

 heads about 13 inch high, the involucral bracts lance-shaped, unequal and 

 over-lapping in several series, the outer somewhat fuzzy-hairy; heads with 

 papery scales on the receptacle between the flowers; seed-like achenes linear 

 to top-shaped, densely hairy, crowned with a pappus of hair-like bristles as 

 long as the corolla. 



Occurrence. — GRAND CANYON, ir. the canyon, 2,500 feet: Phantom Ranch. 



Rabbitbrush (Chrysothamnus Nutt.) 



Many species of rabbitbrush are found in the western United States, the 

 species being most abundant in the open forests or in the dry op>en sage- 

 brush country. The plants are ordinarily rather unattractive and straggly 

 looking until late summer when the bushes become covered with numerous 

 heads of golden yellow flowers. This character is suggested by the generic 

 name, Chrysothammis, from the Greek chrysos, meaning gold, and thamnos, 

 a shrub. In this and other respects the rabbitbrushes resemble many of the 

 gcldenbushes, Aplopappus, from which they may be distinguished by the 

 bracts of the involucre which are usually ridged down the back and arranged 

 in vertical rows. Also, the flower heads of rabbitbrush lack ray flowers 

 present in most of the goldenbushes. The seed-like achenes are crowned by 

 numerous soft white pappus hairs. Some of the species are browsed to a 

 certain extent during the Fall or when other food is scarce. Sometimes the 

 bushes are leafless during most of the year. The flowers of certain species 

 were used by the Navajo Indians for making a yellow dye for their wool. 



Field Guide to the Species 



Stems covered with a dense greenish or whitish felt, at least when young. 



Bracts of involucre rather loosely arranged, the outer with slender green her- 

 baceous tips; flower clusters narrowly oblong, leafy I. C. Parr'^l. 



Bracts of involucre arranged in more distinct vertical ranks, the lips not green- 

 herbaceous; flower clusters mostly more or less flat-topp>ed (elongated 

 in var. consimdis) 2. C. nauseosus. 



Stems smooth or finely fuzzy or hairy, not felty. 



Bracts of involucre in sharply defined vertical rows; achenes smooth or only 

 minutely hairy. 



