Petra k, Die nordamerikanischen Arten der Gattung Cirsium. 535 
2. f) Eastwoodianum. 
Caulis erectus, certe ad 1 m altus, arachnoideo-tomentosus, 
subdense vel dense foliosus, valde ramosus, ramis sub- 
elongatis vel plus minusve abbreviatis, sub- 
dense Jfoliosis, apicem versus interdum fere 
subnudis polycephalis. Folia radicalia mihi ignota; 
caulina inferiora paullatim in petiolum remote sinuato-dentatum 
spinuloso-ciliatum attenuata, brevissime decurrentia, 
supra g 1 a b r e s c e n t i a vel parcissime arach- 
noidea, subtus plus minusve arachnoideo- 
tomentosa canescentia, ambitu oblonga vel 
oblongo-lanceolata, alte sinuato-pinnati- 
fida, laciniisambitu late ovatis, ad medium 
vel ad duas tertias fere inaequaliter bi- vel 
tridentatis, dentibus lanceolatis vel tri- 
a n g u 1 a r i - 1 a n c e o 1 a t i s , a b r u p t i u s c u 1 e acumi- 
natis, spinis subvalidis stramineis 4 — 6 mm 
longis terminatis; caulina superiora gradatim sed parum 
minora, basi semiauriculato-semiamplexicauli profunde spinoso- 
dentata sessilia, breviter decurrentia, alis latis 
profunde spinoso-dentatis basi rotundatis, 
ambitu lanceolata remote sinuato-pinnati- 
f i d a , laciniis late triangulari-ovatis vel triangularibus, 
profunde spinoso-dentatis spinuloso-ciliatis spinis stramineis 
subvalidis parum longioribus armatis, ceterum ut folia caulina 
inferiora. 
Capitula ‘ in apice caulis et ramorum raro solitaria, 
plerumque 2 — 3 subaggregata subsessilia 
vel breviter pedunculata, interdum quasi 
racemose disposita, ebracteata vel bracteis 
1 — 3 1 i n e a r i - 1 a n c e o 1 a t i s spinuloso-ciliatis 
suffulta, basi parum dilatata plus minusve excavata, 
ovata vel ovato-oblonga, raro fere ovato-globosa, 
cum flosculis 35 — 40 mm longa, 18 — 30 mm lata. Involucri 
g 1 a b r e s c e n t i s vel parce arachnoidei foliola 
exteriora e basi ovato-oblonga lanceolata, 
paullatim acuminata, dorso interdum sub- 
carinata plus minusve p u r p u r a s c e n t i a , api- 
cem versus e r e c t o - p a t e n t i a , spinulis sub- 
validis stramineis 1 — 2 1 / 2 mm longis termi- 
n a t a; interiora et intima gradatim longiora, lineari- 
lanceolata paullatim acuminata, apice sub- 
scariosa plus minusve u n d u 1 a t o - c u r v a t a 
brunneo-purpurascentia, nec spinosa. Corollae a 1 - 
b i d a e limbus ad duas tertias circiter inaequaliter quinquefidus, 
laciniis angustissimis linearibus, abruptiuscule acuminatis, a tubo 
vix vel satis distinctus eoque parum brevior vel subaequilongus. 
Filamenta basi glabrescentia, apicem versus dense longiuscule 
crispule papilloso-pilosa. Pappus sordide albus flosculis parum 
brevior, setis plumosis apice saepe tantum scabridis, non vel 
