220 Aven Nelson: Plantae novae occidentali-americanae. 
slight violet tinge: achenes. sparsely and obscurely pubescent, shorter 
than the pappus. 
This species has been under observation by Mr. Garrett for two 
years. One collected in August, 1905, the other in August, 1906, in Big 
Cottonwood Canon, Salt Lake County, Utah. 
9. Machaeranthera paniculata A. Nelson, l. c., p. 38. 
A perennial allied to the preceding: stems several, slender, erect, 
4—8 dm high, with branching paniculate inflorescence, minutely 
puberulent throughout, somewhat glandular-viscid on the tips of the in- 
volucral bracts only: leaves bright green, from oblanceolate to oblong- 
linear, 3—6 cm long; all the lower tapering to margined petioles: the 
upper nearly sessile and passing into the gradually narrowed and reduced 
foliar bracts: bracts numerous, linear, the uppermost subulate; rays of 
the panicle with 1—3 heads: involuere turbinate, 10—14 mm high; its 
bracts in 5—7 series, linear, very pale (white), terminated by a dark- 
green, viscid reflexed tip: rays long, slender, blue or. purple-tinged: 
achenes broadly linear, with minute sparse pubescence. 
This handsome conspicuous species was collected by Mr. Garrett 
on the mountains of Parleys Canon, Utah, September, 13, 1906. 
10. Antennaria solstitialis J. Lunell, l. c., p. 39. 
Stems slender, floccose-woolly, 5—12 cm high, sureulose, broadly 
tufted: stolons 1—3 em long: leaves silvery appressed-pubescent on both 
sides: the basal oblance-spatulate, 5—6 mm long; the stem leaves with 
looser pubescence, 8—14 mm long: heads 5—7, in a glomerate capitate 
cluster; involuere 4—5 mm high, obconical or campanulate, each head 
with a linear-acuminate bract as long or longer than the head; involucral 
bracts from oblong (exterior) to suborbicular (within). 
In the type locality it comes into blossom late in June, and occurs 
sparingly in dry, sunny situations. The other species occurring there 
are A. aprica Greene, which blossoms two weeks earlier, and À. cam- 
pestris Rydb. which is four weeks earlier. À. microphylla Rydb. also 
occurs, but from that species, its nearest relative, A. solstitialis differs in 
its smaller leaves, shorter stolons, the congested inflorescence, and the 
scarcity of pistillate plants (none have yet been found). A. microphylla 
has narrowly oblong heads, at least in the fertile plant. 
The above characters have been taken from manuscript supplied 
by the collector, Dr. J. Lunell, who secured the specimens near 
Leeds, N. D. 
