2 SYNOPSIS OF THE FLORA OF COLORADO. 69 
strigose-hispid above, younger ones silky-hirsute beneath; peduneles 
elong ated, bearing single reads; rays 10, oval-oblong, emarginate or 
2-3 toothe ed, white, thrice the length of the ovate and mad exterior 
scales the involuecre, the inner inclosing the achenia, tnbereulate- 
sa Bote toward the base, dilated above into a short, shtoor hood, trun- 
vate at the summit with the margin entire and in rvolute—P urgatory 
: River, ae Bell. Near Caton City, Redfield. 
¥ Tyas AXILLARIS, Pursh. Stem 6/-15/ high, Heh, branched from a 
5 Raia: slender, woody base, very leafy; leaves 9-15" long, 3/-8” 
wide, obovate or oblong, apknse, narrowed at the base minutely ap- 
pressed- pubescent, sessile ; heads solitary in the axils of the leaves on 
short, recurved pedicels; scales of the campanulate Or apres 4-5, dis- 
tinct or united - the mice fertile flowers 4-55. chat of the receptacle 
filiform-linear.—Hall & arbour, 261. Car 
Iva cryrata, Willd.—Hall & Harbour, 262. 
VA (Burnoss NE) XANTHIIFOLIA, Gr.— Hall & mihi 263, Den- 
nith. 
ver, Dr.§ 
rombereten TRIFIDA, L.—Plains around Denver, Coulter. 
/ _ AMBROSIA PSILOSTACHYA, DO.—On the Platte, near Denver, Dr. 
Smith. 
eS NSERIA! TOMENTOSA, Gr., Pl. Fendl., p. 80. Herbaceous, pubes- 
t throughout, with a soft, silky, and silvery pubescence ; stem erect, 
Dorit 1° high, panienlate bearing numerous ae branches; leaves 
pinnately 3-5 parted, very white, especially beneath, decurrent into a 
short, narrowly- prec hhe tipi fo west apparently ‘bipinnatifid, lobes 
on. ver 
4 the we clustered in the upper axils, ovoid, viscous-pubert i 
with strong, subulate spines somewhat hooked at the see bai two of them 
thicker and beaked, two-flowered—AHall & Harbour, 2 
FRANSERIA Hookertana, Nutt. Annual, much fic nched, 19-2° 
. high ; leaves ovate in eee ie —13' long . minutely strigose,  Biviniatied, 
segments oblong or linear; heads in 1 panicled racemes, fertile ones wit 
several strong, Ratiened prickles sterile ones with a 5-8 cleft involucre 
and 10-20 flowers; chaff of the sterile receptacle small and inconspicn- 
ots — Fal ‘ & Har rbour, 265. Wet Mountain Valley, Brandegee. Near 
ver, Dr. Smith. 
RANSERIA TENUIFOLIA, Gr., Pl. Fendl., p. 80. Stem erect, pa 
branches diffuse, slender; leaves bipiinatisect, strigose, hirsute, 
What cinereous, pinne and segments 3-7, linear, entire or 1-2 to 
: Sometimes with a few separa ate lobes on the narrow rachis, termina 
ng; raceme spike-form, slender. disposed in a leafy 3 
uncinate pining 3 2-celled within, 2-flowered.—Near Pueblo, Greene. ; 
es xGoetl DISCOLOR, Nutt. Stems a span high from a creeping 
1p Sasens RIA, Cav. Heads of two sorts, the fertile ones at the base, and the 
Sterile on i chlttocie the upper portion of the racemes or vn td Fertile heads with 
: : ae hs 
: nnel-shaped, 4-5 toothed, anthers tipped with a sl 
; ovary none; style radiate-penicillate at summit.— ag ute 
; the leaves es alternate, coarsely toothed o hed, or or even Spina 
