Petrak, Die nordamerikanischen Arten der Gattung Cirsium. 379 
pilosa vel glabrescentia, raro glaberrima, basi semi- 
auriculato-semiamplexicauli sessilia, non vel brevissime 
decurrentia, ambitu anguste lanceolata, ad 
medium circiter subremote- sinuato-lobata, 
lobis late ovatis vel triangulari-ovatis, breviter dentatis spinuloso 
ciliatis; caulina superiora gradatim minora, breviter decurrentia, 
ambitu lanceolata, remote sinuato-pinnatifida, laciniis profunde 
spinoso-dentatis, dentibus triangularibus acutis spinis subvalidis 
brunneo-stramineis 3—8 mm longis terminatis. 
Capitula in apice caulis vel ramorum solitaria, ebrac- 
teata vel bracteis 1 — 2 multo brevioribus 
raro subaequilongis, lineari-lanceolatis, 
m argine pectinato-spinulosis suffulta, 
ovata vel ovato-globosa, cum flosculis 5 — 6- cm 
longa' 3 — 3 x / 2 cm lata, basi non vel parum dilatata vix excavata. 
Involucri glaberrimi vel parcissime arachnoi- 
d e i foliola exteriora et media e basi late ovato-ob- 
longa abruptiuscule acuminata, dorso ple- 
rumque plus minusve viscido-carinata, 
spinis infirm is vel subvalidis stramineis 
1 — 5 mm longis terminata, interiora et intima multo 
longiora, linear j -lanceolata paullatim acuminata vel 
apice plus minusve dilatata, scariosa vel 
subscariosa, brunneo-straniinea margine 
non vel plus minusve fimbriato-denticulata. 
Corollae purpureae, raro albidae limbus ad u n a m ter- 
tiam circiter inaequaliter q u i n q u e f i d u s , 
laciniis angustissimis linearibus subobtusis, a tubo vix vel satis 
distinctus eoque subduplo fere brevior. Pappus 
sordide albus, flosculis parum brevior, setis plumosis, apice inter- 
dum tantum scatridis nec clavellatis. Achaenia matura pallide 
brunnea, oblonga compressa, 4 — 5 mm longa, 2 — 2 1 / a mm lata. 
Bienne vel perenne. Floret Junio — Septembri. 
Synonyma: 
Cnicus odoratus Muhl., Cat. pl. Arner. sept., p. 70 (1813). — 
Barton, Comp. Fl. Philad., p. 95 (1818). — Britt. Stern et Pogg., 
Cat. N. Y. Pl., p. 30 (1888). — Britt., Cat. N. Jers. PL, p. 151 
(1889). — Macmill., Metasp. Minnes. Vall. in Rep. geol. nat. hist. 
Surv. Minn. Bot. Ser. I, p. 558 (1892). 
Cnicus pumilus Torr., Comp., p. 282 (1826). — Bigel., Florul. 
Bost. ed. 3, p. 311 (1840). — Gray in Proc. Amer. Acad. X, p. 40 
(1874). — Macoun, Catal. Canad. Pl. I, p. 269 (1883). — Gray, 
Syn. Fl. North Amer. II, p. 401 (1886). — Watson et Coulter, • 
Gray’s Man. Bot. North U. S. 6. ed., p. 296 (1889). — Cheney et 
True in Trans. Wisc. Acad. Sei. IX, p. 81 (1893). — Rand et 
Redfield, Flor. Mount Desert Isl. Maine, p. 278 (1894). — Pammel, 
Thist. Jow. in Proc. Jovva Acad. Sei. VIII. 19, tab. XXII et XXXI 
(1901). 
Carduus pumilus ß. Histrix Nutt., Gen. N. Amer. Pl. II, 
p. 130 (1818). 
