1904] NELSON: ROCKY MOUNTAIN PLANTS 271 
green resiniferous bark, 2-49 high; branches fasciculate or 
brush-like at the top of the stems, 5—15°™ long, glabrous or sub- 
resinous, sometimes leafless and having a spinescent appearance: 
leaves narrowly linear, 1-4 long, entire or with a few widely 
divaricate linear lobes, slightly involute, leaving exposed a 
median line of canescent pubescence: sterile heads small, 3-4™™ 
in diameter, about 20-flowered, mostly spicate on the ends of the 
branches, or more scattered and intra-axillary: their involucre 
green, glabrate, its lobes 7, ovate, obtuse or subacute, often ciliate- 
laciniate ; the corollas tubular-funnelform, 2—2.5™™ long, distinctly 
surpassed by the stamens and protruded penicillate stigma, its 
five tooth-like lobes with a long delicate pubescence partly con- 
cealing the numerous minute glands: anthers linear, shorter than 
the slender filament; chaff spatulate with a long narrow claw: 
fertile involucre oval, 5-6™™ long, its scales consisting of 3 or 4 
cordate-deltoid green ciliate-margined bracts and about 12 
spirally arranged scales which are broadly reniform, delicately 
nerved, thin, and petaloid in appearance, closely enwrapping the 
gland-dotted coriaceous body of the involucre: akene (immature) 
light yellow or greenish, closely dotted with brown. 
The nearest ally is H. salsola T. & G. Pl. Fendl. 79; Pl. Frem. 14, p1. 8; 
but the fertile involucre is only the size of the involucre in 1. monogyra Gray 
_ Pl. Fend. 2. c., and its scales, like the scales of that species, are reniform and 
not contracted at base. Besides the many other minor differences, the two 
Species differ markedly in habitat and time of flowering. /. sa/so/a isa plant 
of the saline basins of desert regions of California and comes into blossom in 
August, while H. fasciculata occurs on rocky ledges and comes. into blossom 
in April. 
The type is no, 662, by Leslie N. Goodding, Kernan, southern Nevada, 
April 29, 1902. 
‘ Gymnolomia nevadensis, n. sp.—Perennial from slender sub- 
vertical rootstocks, from the crown or crowns of which spring 
few to several slender stems: stems 3—5°" high, somewhat striate, 
Sparsely pubescent with minute appressed or sometimes spread- 
ing hairs, simple or more rarely branched; the branches very 
Slender, alternate or opposite: leaves mostly opposite, narrowly 
linear, tapering at both ends, 3-7™ long, 1-3™ wide (rarely 
nearly 5), appressed minutely hispid-pubescent, the margins 
