196 
BOTANY. 
Spring Valleys, Nevada, and Bear River Canon ; 6-8,000 feet elevation ; 
July-September. (690.) 
CiRSiuM EEiocEPHALUM, Gray. Proc. Acad. Phil, March, 1863, p. 69. 
Stem 1-2° high, simple, leafy, deciduously arachnoid-tomentose ; leaves nearly 
smooth above, paler and webby beneath, far decurrent, Hnear, pinnatifid with 
very numerous and crowded short very spiny lobes ; heads several, sessile in 
a dense terminal cluster, involucrate with very spiny foliaceous bracts, w^hich 
pass gradually into spinulose-cihate spine-tipped involucral scales ; innermost 
scales entire, spine-tipped ; flowers yellow. — Alpine regions of the peaks of 
Colorado, (Parry, Hall & Harbour, Vasey 348.) Yar. leiocephalum. Leaves 
smooth on both sides ; heads very prickly, but entire destitute of wool or pu- 
bescence ; otherwise as in the type. — An intermediate form was collected in 
Colorado by Hall & Harbour. Cottonwood Canon, Wahsatch, and in the 
Uintas on a high divide at the head of Bear River; 8-10,500 feet elevation ; 
July, August. (691.) 
Calais^ linearifolia, DC. Scapes simple, 5-14' high; leaves at first 
softly pubescent and ciUate, linear-acuminate, entire or laciniately pinnatifid 
with a few Hnear lobes; involucre of 9-12 unequal smooth lanceolate scales; 
achenia 5'' long, linear-fusiform, short-beaked ; scales of the pappus 5, linear- 
lanceolate, equaling the achenium, the apex bifid, and the midrib produced 
into a slender awn much shorter than the scale.— California to New Mexico 
and Chihuahua. Washoe Valley, Trinity and East Humboldt Mountains, 
Nevada, and Stansbury Island; 4-5,000 feet elevation ; May, June. (692.) 
Calais macroch^ta, Gray. (?) PI. Fendl. 112. A single small imma- 
ture plant, perhaps of this species, was collected in the Trinity Mountains on 
granite rocks. The species may be known by the short oblong bifid pappus- 
scales, with an awn at least three times longer than the scale; the general 
habit much as in the last. (693.) 
Calais nutans. Gray. Pac. R. R. Reports, 4. 113. {Ptilophora nutans, 
Gray. PI. Fendl. 113.) Glabrous, very slender ; stems 6-18' high, simple or 
branching; leaves narrowly hnear, acuminate, entire or with a few subulate 
spreading lobes; involucre cylindrical, 8-20-flowered, caly culate; outer bract- 
i CALAIS, DC -Heads mauy- (rarely few-) flowered ; (the flowers all ligialate.) Involucre cvlin- 
draceons or cainpanulate, e.ther ein^ple and calyculated [bracteolate] at the bale, or iLrica d" ith the 
scales rows^ Receptacle flat, naked. Achenia terete, 12-14.striate, heailess or attenuated up! 
ward and beaked Pappus simple, of 5-10 or 14-22 scarious awned scales, the awns scabrous ba bella^e 
or plumose.-Herbs of Northwestern America, with long naked monocephalous scapes or inches and 
yellow flowers." Gray, Pac. S. R. Reports, 4. 112. urancnes, ana 
