Bailey & Bailey: Woody Plants of National Parks 233 



Plants ^ to 2 feel high; leaves Yz 'o 2 inches long, often without teeth; 

 flowers mostly 7 to 20 in a head; found in Sierra Nevada p>arks 

 of California 3a. Var. Roihrocl(i. 



Plants 1/3 to 1 foot high; leaves 1/5 to % inch long; flowers 3 to 5 in a 



head; found in Rocky Mountain and Southwest parks 



3b. Var. nova. 



Leaves, or some of them, 3- to 5-cleft, sometimes about |/2 their length, into 

 narrow or Imear divisions. 



Leaves 3- to 5-cleft; flowers mostly 5 to 9 in a head 3c. Var. arbuscula. 



Leaves 3-cleft; flowers mostly 3 to 5 in a head 3d. Var. irifida. 



Occurrence {A. Iridentala Nutt.). — CRATER LAKE: near shore of Crater Lake east of 

 the Wineglass. LASSEN. YOSEMITE, common, 4,200 to 10,500 feet: Yosemite Valley, 

 along the trails to Glacier Point; Tenaya Canyon; Snow Creek; south of Spiller Lake; 

 Spiller Canyon across from Red Mountain; west of Surprise Lake; above Fletcher 

 Lake. KINGS CANYON: near Sphinx Creek; Bubbs. Creek. SEQUOIA, abundant, 4,000 

 to 10,000 feet: Little Kern River; Mineral King; between Big Arroyo and Chagoopa 

 Plateau. GLACIER, rare: along North Fork Flathead River road at Round Prairie and 

 near Big Prairie. YELLOWSTONE, common up to 7,000 feet: meadow near Dragon's 

 Mouth; hills north of Rainey Lake; north of Tower Falls; Hayden Valley; Gardiner. 

 GRAND TETON, occasional, 6,600 to 9,500 feet. ROCKY MOUNTAIN, 8,000 to 9,800 feet: 

 south and west slopes of Deer Mountain; Horseshoe Park; Glacier Basin; southwest 

 of Mount Bryant; Grand Lake. MESA VERDE, common, 6,000 to 8,000 feet: near Far 

 View House. BRYCE CANYON, 6,700 to 8,000 feet. ZION : north of Potato Hollow, 

 6,800 feet. GRAND CANYON, 6,000 to 7,600 feet. North Rim, occasional: Powell Pla- 

 teau; Cape Royal. South Rim, abundant: 2 miles south of Yaki Point; Rowe Well; 

 Pasture Wash ; along road between Grand Canyon Village and Desert View. Canyon, 

 just below South Rim. 



3a. RoTHROCK Sagebrush (Var. Rotbrocki (Gray) McMinn). — Simi- 

 lar to big sagebrush but the plants smaller (I/2 to 2 feet high) and the flower 

 clusters form narrow spikes not usually more than 1 inch across; leaves nar- 

 rowly wedge-shaped, often with 3 teeth at the tip, 1/2 to 2 inches long; flower 

 heads oval, larger and with more flowers (usually 7 to 20) than in big sage- 

 brush, borne singly or in close bunches along the erect flowering stems; found 

 on dry plains and plateaus in the high mountains. (Syn. A. Rotbrocki Gray.) 



Occurrence. — YOSEMlTE, occasional, 8,500 to I0,5C0 feet: Monj f-'ass; west slopj of 

 Mount Gibbs; southwest of Grouse Lake; Crescent Lake; near Irving Bright Lake; 

 Matterhorn Canyon; near Ireland Lake; east of Mount Florence; Mount Dana. 

 SEQUOIA: Siberian Outpost, 10,500 feet; near Whitney Meadows; Chagoopa Plateau. 



3b. Black Sagebrush (Var. nova (Nels.) McMinn). — Similar to big 

 sagebrush but much smaller; low shrub, usually 1/3 to 1 foot high, with 

 numerous erect branches from a spreading base; leaves finely silvery hairy, 

 1/5 to % inch long, 3-toothed at the tip; flower heads light brownish, borne 

 in narrow clusters about 1^4 to 1 inch broad; occurs on hillsides, ridges and 

 plateaus, mostly in sandy or gravelly soils and is often one of the most 

 common and abundant undershrubs of the Southwest at fairly high elevations. 

 (Syn. A. nova Nels.). 



Occurrence. — ROCKY mountain, bryce canyon, grand canyon. 



3c. ScABLAND Sagebrush, Low Sagebrush (Var. arbuscula (Nutt.) 

 McMinn) . — Similar in appearance to dwarf forms of big sagebrush; low 

 shrub 1/3 to 1 1/3 feet high; branches stiff and irregular, the lower often with 



