Petrak, Die nordamerikanischen Arten der Gattung Cirsium. 521 
c e n t i a , basi angustata sessilia non decurrentia, 
ambitu oblonga vel 1 a n c e o 1 a t o - o b 1 o n g a , 
alte s i n u a t o - p i n n a t i f i d a , laciniis angustis 
inaequaliter bi- vel trifidis, lobis lanceo- 
latis vel t r i a n g u 1 a r i - 1 a n c e o 1 a t i s paullatim 
acuminatis, margine spinuloso-ciliatis, spinulis strämineis 
infirmis 1 — 3 mm longis terminatis; caulina media et superiora 
gradatim minora, basi parum angustata sessilia, non decur- 
rentia, supra glabrescentia vel parcissime arachnoidea, subtus 
arachnoideo-tomentosa, albida vel canescentia, ambitu lan- 
ceolata, alte etvalde remote sinuato-pinna- 
t i f i d a , laciniis saepe ad basin fere inaequaliter bi- vel trifidis, 
lobis lanceolatis vel triangulari-lanceolatis, paullatim acuminatis, 
margine spinuloso-ciliatis, spinulis infirmis vel subvalidis strami- 
neis 1 — 4 mm longis terminatis. 
Capitula in apice caulis et ramorum solitaria vel 
saepe 2 — 4 s u b a g g r e g a t a , quasi racemose 
d i s p o s i t a , breviter pedunculata, saepe in axillis foliorum 
supremorum capitula 1 — 2 plus minusve abortiva, b r a c t e i s 
1 — 3 1 i n e a r i - 1 a n c e o 1 a t i s margine quasi pec- 
tinatim spinuloso-ciliatis, capitulis multo 
brevioribus suffulta, ovata vel ovato-glo- 
bosa, basi vix dilatata ibique per parum vel 
non excavata, cum flosculis 3 x / 2 cm longa, 2 cm lata. 
Involucri parce et appresse arachnoidei foliola 
exteriora et media e basi ovato-oblonga lanceo- 
lata, a b r u p t i u s c u 1 e acuminata, spinulis 
stramineis erecto- vel subrecurvo-patenti- 
bus infirmis 1 — l x / 2 mm longis terminata, 
dorso subviscido-carinata, interiora et intima 
gradatim longiora lineari-lanceolata paullatim acumi- 
nata, apice plus minusve p u r p u r a s c e n t i a 
subscariosa nec rigida, margine brevissime 
fimbriato-ciliata. Corollae roseae limbus ad medium 
circiter inaequaliter quinquefidus, laciniis angustissimis linearibus 
subobtusis a tubo vix vel satis distinctus eoque parum brevior 
vel subaequilongus. Filamenta parce papilloso-pilosa, vel fere 
glabrescentia. Pappus sordide albus flosculis parum brevior, setis 
nonnullis saepe omnino scabridis, ceteris plumosis, apice tantum 
scabridis ibique vix vel parum clavellatis. Achaenia matura mihi 
ignota. Bienne ? Floret Augusto — Septembri. 
Synonyma: 
Cirsium submuticum Petrak in schedis 1913. 
Vidi e loco sequenti: 
North Dakota: In paludibus montanis Turtle Moun- 
tains, Rolette County prope pagum St. John 23. VIII. 1912 
Coli. Dr. J. Lunell. 
Im Herbste des Jahres 1912 erhielt ich von Herrn Dr. J. L u - 
n e 1 1 einige Exemplare von C. muticum. Unter diesen fielen 
mir sofort zwei Stücke auf, welche sich von den anderen durch 
