Bailey &. Bailey: Woody Plants of National Parks 243 



shrubs up to about 12 (or 15) inches high with shghtly sticky-glandular 

 foliage; leaves linear or linear-lance-shaped, 4 5 to I1/2 inches long, often 

 twisted, the margins with short stiff hairs; flower-clusters small, but sometimes 

 open, the branches smooth; dry hills and plains. 



Occurrence. — YELLOWSTONE: Mammoth Hot Springs. ROCKY mountain. KRYCE 



CANYON. 



5b. Small Rabbitbrush (Var. stenophyllus (Gray) Hall). — Low 

 shrubs 4 to 12 inches high with rather pale green, sticky-glandular foliage; 

 leaves % to 1 1/5 inches long, narrowly linear with inrolled margins, 1 -nerved, 

 not hairy; flower-clusters small, compact, the branches smooth; rocky slopes 

 and dry ridges. 



Occurrence. — GRAND CANYON. 



5c. Lanceleaf Rabbitbrush (Var. lanceolatus (Nutt.) Hall). — Low 

 shrub 2 3 to 2 feet high; herbage densely hairy; leaves broadly linear to linear- 

 lance-shaped, % to 1% inches long, 3- to 5-nerved, usually not twisted; flower 

 clusters small, compact, the branches densely hairy. 



Occurrence. — MESA VERDE. 



5d. Var. elegans Greene. — Plants rarely more than II/2 f^et high; leaves 

 linear, sharp-pointed, 2/3 to I1/2 inches long, 1- to 3-nerved, finely hairy above, 

 usually much twisted; bracts of involucre lance-shaped, with a greenish or 

 brownish thickened spot just below the tip; flower clusters small, compact, the 

 branches densely hairy; in dry valleys and on plains. 



Occurrence. — GRAND CANYON. 



6. Greene's Rabbitbrush {Chysothamnus Greenei (Gray) Greene). 

 — Similar to Chrysothamnus viscidiflorus, particularly the variety stenophyl- 

 lus, because of its low bushy form, the white-barked stems and narrowly fili- 

 form leaves, but differs in having the bracts of the involucre tapering to a 

 slender point. 



Occurrence. — crater lake, grand TETON. 



Goldenweed (Aplopappus Cass.) 



There are numerous species of goldenweed in the western United States, 

 only a rather small proportion of them being shrubs or semi-shrubs. Most 

 of the shrubby species are conspicuous usually during late summer when the 

 bushes are covered with heads of golden-yellow flowers, hence the common 

 name, goldenweed. Some of the species are compact, round-topped bushes; 

 others are erect and more loosely branched. The leaves may be linear, wedge- 

 shaped, or oblong and may be toothed or lobed or not toothed. Some of the 

 species might be confused with the rabbitbrushes which have numerous small 

 heads of yellow flowers, but the heads of the goldenweed are usually broader, 

 more top-shaped or bell-shaped and the involucral bracts are not arranged in 

 such distinct longitudinal rows. In most of the species the petal-like ray 

 flowers are present, but there are some exceptions. The goldenweeds could 



