Cirsium horridulum var. vittatum

(Small) R. W. Long

Rhodora 72: 45. 1970.

Common names: Florida thistle
Endemic
Basionym: Carduus vittatus Small Bull. New York Bot. Gard. 3: 439. 1905
Synonyms: Carduus smallii (Britton) H. E. Ahles Cirsium smallii Britton Cirsium vittatum (Small) Small
Treatment appears in FNA Volume 19. Treatment on page 116. Mentioned on page 114.

Plants 30–90 cm. Stems glabrous to sparsely tomentose. Leaves: blades linear to oblong, 10–30 cm, spinose-dentate to shallowly pinnatifid, main spines mostly 5–10 mm, abaxial faces glabrous or nearly so. Heads 1–10. Involucres 3–4 × 3–6 cm, glabrous. Phyllaries: outer and middle bodies densely scabridulous, marginal spinules 0.1–0.5 mm. Corollas purple. 2n = 32, 33, 34, 35.


Phenology: Flowering winter–summer (Feb–Aug).
Habitat: Meadows, pastures, old fields, pinelands, usually in damp soil
Elevation: 0–100 m

Distribution

V19-65-distribution-map.gif

Ala., Fla., Ga., La., Miss., N.C., S.C.

Discussion

Variety vittatum grows on the coastal plain.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

35 +, 34 +, 33 +  and 32 +
nearly +  and glabrous +
glabrous +  and more or less densely villous +
short-tailed +
spineless +  and twisted +
dentate +, entire +  and spine-tipped +
erect +  and spreading +
innermost +
acuminate +
scarious +
subcapitate +  and corymbiform +
indeterminate +  and determinate +
David J. Keil +
(Small) R. W. Long +
winged-petiolate +
auriculate-clasping +
tapered +
Carduus vittatus +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
spinose-dentate;shallowly pinnatifid +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
reddish-tinged +
10-nerved or 20-nerved +  and rugose +
spreading;ascending +
tawny +  and white +
Florida thistle +
actinomorphic +
white +  and yellow pink purple or red +
3 cm30 mm <br />0.03 m <br /> (4.7 cm47 mm <br />0.047 m <br />) +
straw-colored +  and tan +
compressed +  and ovoid +
fertile +  and bisexual +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +  and S.C. +
0–100 m +
gray-canescent +  and glabrous +
perennating +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Meadows, pastures, old fields, pinelands, usually in damp soil +
indeterminate +
each +  and sessile +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
hemispheric;campanulate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
lobed +  and spiny-dentate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
entire +  and dentate +
setulose-ciliolate +
usually lobed +  and dissected +
2-carpellate +
persistent +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering winter–summer (Feb–Aug). +
middle +  and outer +
papillate +  and smooth +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
spiny-winged +, simple +  and branched +
glabrous +  and sparsely tomentose +
1 +  and several +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Carduus smallii +, Cirsium smallii +  and Cirsium vittatum +
Cirsium horridulum var. vittatum +
Cirsium horridulum +
variety +
cylindric +
expanded +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
bristly-dentate to coarsely +
slender +
1.1 cm11 mm <br />0.011 m <br /> (3 cm30 mm <br />0.03 m <br />) +
perennial +  and biennial +
appressed-ascending +
15 cm150 mm <br />0.15 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +