248 



American Midland Naturalist Monograph No. 4 



green and herbaceous, the outer sometimes leaf -like; leaves wider than in A. 

 Bloomeri, I/3 to 1/3 inch wide. At Crater Lake National Park this species 

 intergrades with A. Bloomeri. 



Occurrence. — CRATER LAKE: rim of Crater Lake, near Lodge. 



10. Paleleaf Golden- 

 weed (Aplopappus acra- 

 denius (Greene) Blake), 

 fig. 144. — Erect shrub 2 to 

 3 feet high, the branches 

 leafy to the tip; bark light 

 straw-color, smooth or be- 

 coming grayish and shred- 

 dy; leaves 1 to 2% inches 

 long, oblong, tapering to a 

 narrow base, the margins 

 sharply toothed with broad 

 teeth or irregularly divided 

 into several spreading nar- 

 row lobes sometimes as 

 much as 1/2 inch long, the 

 teeth or lobes tipped with 

 a slender point; stems usu- 

 ally with several reduced 

 leaves clustered in the axils 

 of the main leaves; flower 

 heads few to several, borne 

 at the ends of short leafy 

 branches on very short 

 stalks or without stalks; in- 

 volucral bracts overlapping 

 in several lengths, stiffly 

 papery, shiny, the margins 

 thin; outer bracts somewhat 



thickened and greenish at the tips; petal-like ray flowers none; seed-like 

 achenes slightly tapering to the base, densely covered with white hairs, pappus 

 bristles numerous, unequal, brownish. 



Occurrence. — GRAND CANYON, common along streams and in gullies in the canyon, 

 2,500 to 4,000 feet: Bright Angel trail below Indian Gardens; Phantom Ranch; bridge 

 near mouth of Bright Angel Creek; Kaibab trail along Bright Angel Creek for several 

 miles above Phantom Ranch. 



Fig. 144. Paleleaf goldenweed 

 (^Aplopappus acraJenius). 



11. Nuttall Goldenweed (Aplopappus Nuttalli T. &: G.). — Low 

 plant with spreading stems woody only at the base; bark gray to nearly white; 

 leaves oblong-spatula-shaped, % to I1/2 inches long, hairy to rough-glandular 

 or nearly smooth, the margins with low bristle-tipped teeth; heads borne 

 singly or several at the ends of the branches; involucre ^ to % inch high, 

 about as broad; bracts few, overlapping in about 3 series, lance-shaped to 



