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FNA | Family List | FNA Vol. 20 | Asteraceae | Symphyotrichum

13a. Symphyotrichum patens (Aiton) G. L. Nesom var. patentissimum (Lindley ex de Candolle) G. L. Nesom, Phytologia. 77: 288. 1995.

Aster patentissimus Lindley ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 232. 1836; A. arnottii Nees ex Torrey & A. Gray; A. continuus Small; A. patens Aiton var. patentissimus (Lindley ex de Candolle) Torrey & A. Gray; A. subsessilis E. S. Burgess; Virgulus patens (Aiton) Reveal & Keener var. patentissimus (Lindley ex de Candolle) Reveal & Keener

Plants robust. Involucres turbinate, 8–12 mm. Phyllaries in 5–7 series, appressed, obtuse, densely strigillose to canescent, eglandular or sparsely glandular; mid 1.2–1.7 mm wide. 2 n = 20.

Flowering late Aug–early Nov. Dry oak-hickory woodlands; 0–1000+ m; Ark., Ill., Kans., Ky., La., Miss., Mo., Okla., Tex.

Variety patentissimum is found mostly west of the Mississippi River, in the Interior Uplands of the eastern United States. It is similar to the typical variety except for the involucre, which is usually 8–12 mm with more phyllaries in more series. Intermediates occur with var. patens.


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