168 A SKETCH OF THE BOTANY OF THE BASIN OF THE GREAT SALT LAKE OF UTAH. 
the lobes very small, obtuse, and much crowded. Head few in a terminal corymb; flowers 
of the ray and disk nearly alike, funnel form. Pappus of about ten oblong, obtuse, denticu- 
late scales, five of which in the disk flowers, are nearly as long as the tube of the corolla, 
and the other five about half as long. Stansbury Island, June. Major Stansbury. 
Layta glandulosa. Hook. and Arn., Torr. and Gr., fl. 2, p. 394. About one foot high, 
erect and hispid towards the base; leaves broadly linear, entire ; peduncles of the cauline 
leaves and involucre glandular; heads large, rays white, 3—cleft, double the length of 
the involucre. Valley of the Great Salt Lake, Major Stansbury. 
ACHILLEA millefolium, Linn. Torr. and Gr., fl. 2, p. 409. (Yarrow.) Islands of the Salt 
Lake, Major Stansbury. 
Var. lanata, Koch. Densely woolly, with finely bipinnately parted leaves ; 
heads rather larger than the common species; the whole plant bearing a whitish tomen- 
tose appearance. Great Salt Lake City, Mrs. Carrington. 
ARTEMISIA————-——— (generally called Sage or Wormwood.) The genus Artemisia 
is extensively spread in the Western regions; not less than thirty distinct species have 
already been described as belonging to Oregon and California, several of which are hardy 
and shrubby plants from 3 to 6 feet high. Col. Fremont, Maj. Stansbury and Lieut. 
Beckwith speak of large patches of Artemisia on the flats of the Great Salt Lake; but, as 
far as I know, they have brought no specimens to permit us to ascertain to what species 
of this genus this Artemisia belongs. It is probable that it is one or several of the four 
species enumerated by Dr. Torrey, as found by Maj. Stansbury on the shores of the Green 
River, 160 miles from the Great Salt Lake City, viz.: A. tridentata, A. frigida, A. Ludo- 
viciana, A. Canadensis. | 
Senecio Hookeri. Torr. and Gr., fl. 2, p. 438. (Groundsel.) Stem simple, 6—12 
inches high ; radical and lowest cauline leaves ovate or spathulate-oblong, repand-denticu- 
late or entire, contracted into a short margined petiole; the upper leaves lanceolate, en- 
tire, sessile; scale of the involucre nearly glabrous. Flowers rather small; rays bright 
yellow. Mouth of Weber River. May. Major Stansbury. 
S. . . . . hydrophyllus. Nutt.in Torr. and Gr., fl. 2, p. 440. Stem simple, 
striate, very glabrous, rather leafy, leaves lanceolate, entire or obsolately repand-denti- 
culate ; the radical and lowest cauline elongated, tapering into a thickish somewhat clasp- 
ing petiole. Heads in a compound naked corymb; rays 3—6, very small; the tips of the 
involucral scales purplish. Valley of the Salt Lake, Maj. Stansbury. 
S. . . . . filifolius Nutt. in Torr. and Gr., fl. 2, p. 444. Suffruticose and much 
branched, the branches diffuse, very leafy to the summit. Leaves pinnately 5—9 parted, 
segments very narrowly linear with revolute margins; heads rather large, rays 6—8, linear, 
elongated. Valley of the Salt Lake, Major Stansbury. 
