1912] NELSON—IDAHO PLANTS 227 
herbaceous, slender, erect, only 5-10 cm. high, glandular-pubescent: 
leaves granular-glandular-viscid, obovate or oblong or broadly © 
oblanceolate, the blades 1-3 cm. long, obtuse or subacute, mostly 
sparsely cuspidate-toothed on margin; the lower tapering cune- 
ately into a slender petiole as long as the blade: heads 1-4, 9-14 
mm. high, subsessile and subtended by the upper leaves and bracts; 
involucral bracts broadly linear, in 3 or 4 rows, acute and subcus- 
pidate, green and glandular-viscid at apex, pale and carinate at 
base: rays wanting; disk flowers numerous, slender: achene 
cylindric-fusiform, pubescent, about 3 mm. long, about one-third 
as long as the corolla, which barely exceeds the scabrous pappus. 
With the admission of M. grindelioides Rydb. and now this species to the 
genus Macronema, the:characters of the genus must be modified so as to include 
toothed as well as entire leaves, and the involucral bracts in even 3-4 series. 
No. 641, by MAcsrRipE, from Trinity Lake region, Elmore County, August 
27, 1910, is the type. 
Machaeranthera magna, n. sp.—Grayish-tawny with a minute 
puberulence and granular-viscid, more strongly upward: stems 
stout, few to several from a stout biennial root, branched upward 
and leafy, naked below, 5-10 dm. high: leaves linear, very numer- 
ous, more or less involute, 1-3 cm. long, abruptly apiculate with a 
minute white cusp, margins entire or occasionally a few scatter- 
ing larger leaves occur and these are sparsely few-toothed: heads 
numerous on the branched upper half of the plant, terminal and 
racemosely or spicately disposed on the branchlets, subtended by 
several foliar bracts: involucre broadly turbinate, 8-10 mm. high, 
almost as broad, shorter than the disk; its bracts in several series, 
erect at first but the dark tips at length squarrose or reflexed, 
minutely white-puberulent and viscid: rays 15-20: achenes densely 
short-pubescent, shorter than the fuscous pappus which equals 
the corolla. 
At first glance one might think this a gigantic M. viscosa Greene if it were 
not for the small multitudinous linear evidently pubescent leaves, and the 
unusual viscosity which extends to most of the plant instead of a part of the 
inflorescence only. The involucral bracts too are more numerous, less ou 
and only acute (not acuminate 
Type from the sandy bottom lands on the Payette River, near Falk’s 
Store, September 5, 1910, no. 720. 
