524 COMPOSITAE 
1d Cirsium neomexicanum A. Gray. New Mexico Thistle. Fig. 5913. 
A. Gray, Smiths. Contr. 56: 101. 1853. 
Plants biennial or short-lived perennial from a stout taproot, generally monocarpic; 
se “8 (or 20) dm. tall, stout ur ra aber, rah elongate slender branches, white- sgpeneae pitabaee 
a little crisp- Seat nt, the tom m becoming thin and floccose on the lower part. Basal 
leaves forming a dense, many-leaved salieis that probably develops through more thes one season, 
narrowly oblanceolate, ie earliest shallowly sinuate-lobed or deltoid-lobed, becoming more deeply 
daend up to 3 dm. long and 6 cm. wide, the i pig sions 2- or 3-lobed with the lobes terminating in a 
stoutish vetlow spine, hes biides' narrowed t short, more or less on ccigar ied piny-bordered, 
petiole-like base, tomentose on both sides but greener ro subglabrescent above; lower cauline 
leaves similar to the basal leaves but eo r and becoming sessile ie < cpr decurrent base, 
he stem someti spiny-winged near] ihe next node; upper leaves becoming much smalle 
€ Ss imes -win yt 
and bract-like, very spiny but scarcely decurrent; heads solitary, oe ly “ he Nes: of er 
slender branches, usually broader than long and hemispheric, 3-6 cm. long, wide 
volucre ay nom to broadly bowl-shaped, more or less ir A tom aati e or ‘the ileiets 
tending to be i i 
sometimes e cose and d ; phyllaries linear-lanceol ap- 
pressed, the elongate tips of the outer phyllaries cacy d, h phyllaries divergently 
spreading or loosely ascending, straight or the uppe es sigmoid-curved, the base chartaceous, 
the tips herbaceous and often too snail rie Alou the middle, sometimes glandular, tipped 
by a strong yellow spine, the in phyllaries flat, attenuate into a slender chartaceous spinul 
flowers white, pink, or inveader ‘the Sererciniit generally cutacatdy. Dekadiim: the corolla- be 
~2 cm. long, the throat 5-8 mm. a i aij lobes 8-10 mm. long; achene purplish bro wks elliptic- 
oblong or -obovate, 5 mm. long, 2-2. wide; pappus 1.5-2.5 cm. long, white, sometimes with 
dark-colored processes are sides of cee near the bas 
Dry, gravelly or rocky slopes and canyons, Lower and 98 Sonoran Zones; mountains in the rai = 
of the, id staee Desert. California, at to Colorado and New Mexico. Type locality: “Side of the Org 
tains,”” New Mexico. April- Sept. 
13. Cirsium utahénse Petrak. 56 a Sees Thistle. Fig. 5914. 
? Carduus nevadensis Greene, Pittonia 3: 26. 1896. Not Cirsium nevadense Willk. 1859 
? Cirsium humboldtense Rydb. Fi. Rocky Mts. 1007, 1068. 1917 este 
eas eee Petrak, — Bot. reps ie 470. 1917. 
M. E. k, Madrofi 
Plants with a long, ee or stout tape the —— Labia woins ce through two to 
four years, monocarpic or sometimes perennial with n osettes arisin the branched, 
caudex-like crown of the taproot; stems erect, 1 esi tall. see or Sightly tne yee 
arachnoid-tomentose and crisp-puberulent. Earliest — ellie o oblanceolate, alm 
diately denticulate and with numerous small spines fringing the 2 Sarl sp posite dents estar 
n d natel wi e 
‘ Ss, closely t 
solitary at the ends of longer or shorter, leafless or leafy-bracteate branchlets, subglobose, 3.5-5 
em. long; involucre campanulate, conspicuously aca tomentose or the tomentum tending to 
WwW \wif yy LY 
= Nie 
~~ “Wy ie 
yh f 
SW ey 
— NS 
5913. Cirsium neomexicanum : 
5914. Cirsium utahense | 
