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

7c. Pityopsis graminifolia (Michaux) Nuttall var. tenuifolia (Torrey) Semple & F. D. Bowers, Rev. Pityopsis. 24. 1985.

Inula graminifolia Michaux var. tenuifolia Torrey, Ann. Lyceum Nat. Hist. New York 2: 212. 1827; Chrysopsis graminifolia (Michaux) Elliott var. microcephala (Small) Cronquist; Heterotheca microcephala (Small) Shinners; Pityopsis graminifolia var. microcephala (Small) Semple

Cauline leaves slightly overlapping, linear-lanceolate, 40–70 × 2–5 mm, reduced distally. Involucres 4.5–8 mm. Phyllary faces (inner) usually sparsely to moderately, rarely densely sericeous throughout, sometimes sparsely glandular distally. Ray florets 8–12; laminae 4–7 mm. Disc florets 15–28; corollas 4.5–6 mm, lobes 0.4–0.7 mm, glabrous. 2n = 18.

Flowering early fall–spring (Fla.). Sandy soils, open oak-pine woods, scrub, roadsides; 0–300 m; Ala., Ark., Fla., Ga., La., N.C., Okla., S.C., Tex.

Variety tenuifolia grows on the outer coastal plain from east Texas to North Carolina, and inland to the southern Ozark Plateau. Involucres of some Texas plants are larger than those further east. It is unknown whether such plants are diploid or tetraploid.


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