CATALOGUE. 169 



site and alternate, petioled, 12-18" long, oblong-linear or elliptical, entire, 

 3-nerved at the base ; heads numerous on long and very slender peduncles, 

 very small, scarcely 1' broad ; involucre of 10-12 ovate-acuminate foliaceous 

 scales, half as long as the 5-8 broad but very short rays ; chaff of the recepta- 

 cle tricuspidate, with the middle point becoming a stout awn ; achenia glab- 

 rous or hirsute ; scales of the pappus ovate-lanceolate. — California, (Bolan- 

 der !) Carson Desert, near Soda Lake ; 4,000 feet elevation ; July. (600.) 



Helianthus lenticulaeis, Douglas. Annual, scabrous and even his- 

 pid; stems purple-spotted, stout, 3-8° high, branching; leaves alternate, 

 ovate, acuminate, coarsely serrate, 3-6' long, 2-4' broad, 3-nerved at the base 

 and suddenly narrowed into a petiole nearly as long as the leaf; uppermost 

 leaves more lanceolate ; heads mostly panicled, peduncled, 2J-4' broad ; 

 involucre spreading ; the numerous ovate ciliate abruptly acuminate scales 

 imbricated in about 3 rows, outer ones shortest ; rays 20-24, large ; chaff 

 of the flat receptacle nearly as long as the purplish disk-flowers, concave, 

 carinate, tricuspidate, the middle point much the strongest and dark-colored ; 

 achenia finely appressed-pubescent ; pappus of two lanceolate chaffy awns. — 

 Saskatchewan to Oregon, California, and Arizona, and eastward from the 

 Upper Missouri to Texas and New Mexico. - Common in the valleys through- 

 out Nevada, and in Salt Lake Valley ; 4-6,000 feet elevation ; July-Octo- 

 ber. (601.) 



Helianthus Nutallii, T. & Gr. Perennial ; stem smooth, 3-4° high ; 

 leaves opposite, or all but the lower ones alternate, short-petioled, the upper 

 sessile, all narrow linear-lanceolate, 4-6' long, 3-6" or even 12" wide, entire 

 or distantly serrate, 3-nerved near the base, scabrous on both sides ; heads 

 1-7, about 2' broad ; involucre of lanceolate-subulate scales, hirsute toward 

 the base ; rays 20-24, rather narrow, deep-yellow ; achenia glabrous ; pap- 

 pus of 2 lanceolate chaffy scales. — Plains of the Snake River, (Nuttall ;) 

 Rocky Mountains of Southern Idaho, (Burke.) Unionville, Upper Hum- 

 boldt, and Ruby Valleys ; 4-6,000 feet elevation ; August-October. (602.) 



Helianthus giganteus, L. Saskatchewan and Canada to Georgia. 

 Var. Utahensis. Stem slightly hirsute, at length smooth ; leaves narrower 

 and thinner than in H. giganteus, minutely scabrous above, appressed-pubes- 

 cent beneath, all but the uppermost opposite, narrowed into a short winged 

 petiole ; heads, &c., as in H. giganteus. — Parley's Park, Utah ; 6,000 feet 



elevation; July. (603.) 

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