P e t r a k , Die nordamerikanischen Arten der Gattung Cirsium. 289 
albo-tomentosa, basi quasi in petiolum anguste alatinn, parce 
breviterque spinuloso-dentatum abrupte attenuata, non v e 1 
brevissime decurrentia, ambitu late ovato-oblonga, 
ad medium vel ad duas tertias circiter sinu- 
ato-pinnatifida, laciniis latissimis ambitu 
ovatis i r r e g u 1 a r i t e r breviterque dentatis, 
dentibus late triangularibus vel triangulari-ovatis, obtusis, spinis 
subvalidis stramineis, 1 — 2 mm longis terminatis nec margine 
spinuloso-ciliatis. Folia caulina superiora et suprema g r a d a t i m 
sed parum minora, basi semiamplexicauli sessilia, ambitu 
ovato-oblonga, ad medium circiter dense sinuato-pinnatifida, 
laciniis inaequaliter bi- vel tridentatis, dentibus triangularibus 
acuminatis, spinis subvalidis vel validis 3 — 7 mm longis terminatis, 
margine parce spinuloso-ciliatis, ceterum ut folia caulina in- 
feriora. 
Capitula in apice caulis vel ramorum 3 — 8 plus minusve 
aggregata, sessilia vel breviter pedunculata, b r a c t e i s 
2 — 6 plus minusve minoribus vel subaequi- 
longis, lanceolatis vel lanceolato-oblongis remote spinoso-den- 
tatis, dentibus ad spinas fere omnino reductis suffulta, basi parum 
dilatata excavata, ovata vel ovato-globosa cum 
flosculis 3 — 4 cm longa, 2 — 3 cm lata. Involucri dense arach- 
n o i d e i foliola exteriora et media e basi ovato-oblonga lineari- 
lanceolata, paullatim attenuata, apicem versus mar- 
gine remote spinuloso-ciliata, spinulis subvalidis 
stramineis 1 — 2 x / 2 mm longis, dorso subcarinata plus minusve 
purpurascentia, spinis stramineis subvalidis 
3 — 6 mm longis terminata, a medio circiter erecto- 
patentia; interiora et intima parum longiora lineari-lanceolata, 
paullatim acuminata, apicem versus stramineo- 
marginata ibique spinuloso-fimbriata, spinu- 
lis stramineis infirmis 4 — 5 mm longis terminata. Corollae pur- 
pureae vel roseae raro albidae limbus a tubo vix vel satis distinctus, 
ad medium circiter inaequaliter quinquefidus, laciniis angustis- 
simis linearibus subobtusis eoque parum brevior vel subaequi- 
longus. Filamenta subdense longiuscule papilloso-pilosa. Pappus 
sordide albus, tubo parum longior, setis plumosis, apice interdum 
tantum scabridis nec dilatatis. Achaenia matura oblonga, fusca 
vel fusco-nigrescentia, circiter 4 mm longa, 2 x / a mm lata. Perenne ? 
Floret Maio — J ulio. 
Synonyma: 
Carduus maritima Eimer in Bot. Gaz. XXXIX p. 45 (1905). 
— Carduus maritimus Hall, Compos. South. Calif. in Univ. Calif. 
Publ. Bot. III./l. p. 238 (1907). 
Cirsium maritimum Petrak in Cirsioth. univ. Fase. XII. 
Nr. 115 (1914) nec Makino in Tokyo Bot Mag. XXIV. p. 249. 
Exsiccata: Petrak, Cirsiotheca universa Nr. 115. 
Distributio: In arenosis siccis secus litora maris prope 
pagum „Surf“ non procul ab urbe „Santa Barbara“ Californiae 
Beihefte Bot. Centralbl. Bd. XXXV. Abt. II. Heft 2 ( 3. 
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