510 Petrak, Die nordamerikanischen Arten der Gattung Cirsium. 
profunde spinoso-dentata semiauriculato-semiamplexicauli sessilia, 
non vel breviter decurrentia, ambitu ob- 
longa vel lanceolato-oblonga subremote alte 
sinuato-pinnatifida, laciniis inaequaliter 
bi- vel trifidis, lobis lanceolatis vel tri- 
angulari-lanceolatis abruptiuscule acumi- 
natis, spinis stramineis subvalidis 1 — 3 mm 
longis terminatis, margine spinuloso-ciliatis; caulina 
superiora gradatim minora, basi late semiauriculato-semiamplexi- 
eauli sessilia, non vel breviter decurrentia, am- 
bitu oblongo-lanceolata vel lanceolata, r e - 
mote sinuato-pinnatif ida, laciniis inaequaliter bi- 
vel tridentatis, dentibus triangularibus vel lanceolato-triangu- 
laribus acuminatis, spinis stramineis 2 — 5 mm longis subvalidis 
terminatis, ceterum ut folia caulina inferiora. 
Capitula in apice caulis et ramorum solitaria, ple- 
rurnque ebracteata vel raro bracteis 1 — 2 
multo minoribus lineari-lanceolatis mar- 
gine dense spinuloso-ciliatis suffulta, o b - 
longa vel oblongo-cylindracea, basi ab rtr p t e 
in pedunculum attenuata nec excavata, non vel perparum 
dilatata, cum flosculis 30 — 40 mm longa, 12 — 16 mm lata. In- 
volucri glabrescentis vel parcissi me arach- 
n o i d e i foliola exteriora et media e basi ovato-oblonga 
abruptiuscule attenuata, dorso subcarinata 
spinis stramineis subvalidis erecto-paten- 
tibus 2 — 4 mm longis terminatis; interiora et 
intima multo-longiora linearia vel lineari- 
lanceolata e 1 o n g a t o - a t t e n u a t a , abruptius- 
cule acuminata nec spinosa, nec rigida. Corollae pur- 
pureae vel roseae limbus ad medium vel ad duas 
tertias fere aequaliter q u i n q u e f i d u s , laci- 
niis angustis linearibus abruptiuscule acu- 
minatis, a tubo non vel vix distinctus eoque 
duplo vel fere triplo longior. Filamenta plus 
minusve longiuscule crispule papilloso-pilosa. Pappus sordide 
albus flosculis parum brevior, setis interdum nonnullis omnino 
scabridis plerumque plumosis, apice tantum scabridis vix clavellatis. 
Achaenia matura brunnea vel fusca, nitida, oblonga, compressa, 
5 — 6 mm longa, 2 — 2 1 / 2 mm lata. Perenne ? Floret Juli o — 
A u g u s t o. 
Synonyma: 
Carduus pulchellus Greene in schedis. 1899. — Rydberg Flor. 
Colorado p. 400, 401 (1906) sec. Ind. Americ. 
Carduus truncatus Greene in schedis 1898/99. — Rydberg, 
Flor. Colorad., p. 400, 401 (1906) sec. Ind. Americ. 
Distributio: In pratis montanis, declivibus lapidosis 
vel saxosis in regionibus meridionali-occidentalibus civitatis Colo- 
rado et in montibus meridionali-orientalibus Utahensibus dis- 
persum. 
