Cirsium horridulum var. vittatum

(Small) R. W. Long

Rhodora 72: 45. 1970.

Common names: Florida thistle
Basionym: Carduus vittatus Small
Synonyms: Carduus smallii (Britton) H. E. AhlesCirsium smallii BrittonCirsium vittatum (Small) Small
Treatment appears in FNA Volume 19. Treatment on page 116. Mentioned on page 114.
Revision as of 00:21, 27 July 2019 by FNA>Volume Importer
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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.
David J. Keil +
(Small) R. W. Long +
Carduus vittatus +
Florida thistle +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +  and S.C. +
0–100 m +
Meadows, pastures, old fields, pinelands, usually in damp soil +
Flowering winter–summer (Feb–Aug). +
Carduus smallii +, Cirsium smallii +  and Cirsium vittatum +
Cirsium horridulum var. vittatum +
Cirsium horridulum +
variety +