146 BOTANY. 
Sonipaco pumiza, T. & G.—Stems several, from a woody procumbent 
caudex, 2-4’ long and leafy, angled, striate and nearly smooth; leaves rigid, 
mucronate, linear, or linear-lanceolate, 9-18” long; heads few-flowered, 
clustered in 3 or 4, and disposed in a small corymb; scales of the involucre 
in several series, outer ones much shorter, rather acute, thickish ; rays short 
and (like the disk-flowers) 2-4. Scales of the involucre appear (from my 
single specimen) to vary much in shape, acuteness, and thickness of the 
keel—Eastern Arizona, at 6,500 feet, Loew. 
SoLipaco NeMoRALIS, Ait—Twin Lakes, Colorado (408); also a 
variety from Nevada, Utah, and San Francisco Mountains, Arizona. 
SoLmpaco spaRsiFLora, Gray (Proc. Amer. Acad. xii, p. 58).—*“ Vir- 
gaurea, Virgate: Scabrous-puberulent; lower leaves unknown, upper ones 
and floral ones smallish, lanceolate (6-12” long); racemes loosely few- 
headed and loosely thyrsoid; scales of the involucre linear, puberulent, 
at apex rather acute and greenish; ray-flowers about 10, ligules small; 
disk-flowers 4-5; achenia silky-pubescent.—Camp Lowell, Arizona.” 
(706.) 
~ SoLrpaco MOLLIS, Bartl. (8. incana, T. & G., var. @.?)—This rather 
remarkable form (782) from Arizona is canescent on the stem, 2—4° high ; 
leaves decidedly scabrous, tripli-nerved, entire or sharply toothed toward the 
apex; head medium-sized and densely crowded in a contracted, secund - 
panicle; scales of the involucre lanceolate, acute, and somewhat searious 
on the margin, and with a darker midrib; achenia pubescent; branchlets of 
the panicle and the pedicels densely and softly tomentose. 
Soripaco Marsnatii.—Erect, nearly smooth, or slightly pubescent in 
lines; leaves linear-lanceolate or lanceolate, entire, sessile, tapering toward 
either end; glandular dots and veinlets transparent by transmitted light, 
1-4’ long and 2-7’ wide; panicle compound, and with the branchlets 
strongly secund; heads medium-sized, rays 8, disk-flowers 9; achenia 
short, cylindrical, hairy; scales of the involucre lanceolate or oblong, 
obtuse, thickish, and under the lens minutely roughened on the margin ; 
pappus shorter than the disk-flower ; bracts minute, almost subulate, about 
three on each of the slender smoothish pedicels. 
