192 
BOTANY. 
tipped and sphacelate; rays 7-9, rather long; achenia striate, glabrous. — 
Mackenzie Eiver to the Saskatchewan, and southward to Colorado and New 
Mexico. Xear Salt Lake City, (Mrs. Carrington, fide Durand.) Canons of 
the Walisatcli and Uintas ; 6-9,000 feet altitude ; July, August. (676.) 
Senecio Fremontii, T. & G. Gray, Proc. Acad. Phil, March, 1863, 
7:'. 67. Perennial, glabrous; stems 1-several, 3-15' high, leafy to the top; 
leaves sessile, oblong or spatulate-obovate, somewhat fleshy, laciniately toothed 
or obscurely dentate ; upper ones 9"-2' long, lower ones gradually smaller ; 
heads short-peduucled, erect, solitary or few and corymbose ; involucre bell- 
shaped, 4-6" long, scarcely calyculate ; rays 10-16, one-half longer than the 
involucre ; achenia glabrous, (puberulent, Gray.) — Wyoming and Colorado, 
in high alpine regions ; also in the Rocky Mountains in 49° north latitude, 
(Dr. Lyall.) Cottonwood Caiion, Wahsatch, and in the Uintas above Bear 
River Canon ; 8-12,000 feet elevation ; July, August. Plants much branched 
from the base, and with leaves much smaller than those of the Colorado speci- 
mens of Parry, Hall & Harbour, &c. (677.) 
Senecio amplectens, Gray. Proc. Acad. Phil., March, 1863, p. 77. 
"Deciduously floccose-woolly, soon glabrate ; stem 6—18' high from a peren- 
nial root, naked toward the summit, and bearing 1-3 heads ; leaves membra- 
naceous, oblong or t(niguc-shaped, repand or very sharply serrate, sometimes 
slightly laciniate, lowest ones narrowed at the base or contracted into a 
winged petiole ; upper ones sessile, partly clasping by a sometimes dilated 
base ; heads nodding on slender peduncles ; involucre lax, calyculate ; the 
golden rays hnear, elongated, 1-2' long; achenia perfectly glabrous." — 
Mountains of Colorado, (Parry! Hall & Harbour ! Vasey!) Var. taraxi- 
coiDES, Gray, I c. "Truly alpine; stems 4-5' high, bearing single heads, 
which are smaller and less nodding; rays about half an inch long ; leaves all 
nan-owed at i\m base, more or less laciniate." — Bare alpine regions of the Colo- 
rado peaks, (Parry, 28!) Rocks below Clover Peak, Nevada; 10,000 feet 
elevation ; 8eptem])er. Plants 5-7' high, with much larger leaves than Par- 
ry's, nnd the niys very scantily developed. One form has laciniately-toothed 
leaves, (678,) and in another tlie leaves are entire, or at most obscurely den- 
ticulate. (679.) 
PsATiiYROTES^ ANNUA, Gr.iv. FL Wright. 2. 100; Proc. Amer. Acad. 7. 
» PSATHYROTES, Quay, I.e. 11. .; .. .. iv-llowered, the flowers all alike, perfect, fertile. Corol- 
las cylindrical with a very short propter t\\U\ o-tootlied, tlie teeth short and very obtuse, villous exteriorly. 
Involucre of two rows of scales as \on<^ as the disk. Receptacle naked, fiat or convex. Anthers linear, 
