Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: Cronquist (1980) reports Rudbeckia graminifolia from Florida (Gulf, Bay, Calhoun, Liberty and Franklin Counties). Reported from Georgia (Duncan and Kartesz 1981).

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Physical Description

Morphology

Description

Perennials, to 80 cm (roots fibrous). Stems moderately strigose (hairs ascending). Leaves: blades narrowly lanceolate to elliptic (grasslike, lengths 10+ times widths, not lobed), herbaceous, bases attenuate, margins entire, apices acute, faces glabrous or sparsely hirsute; basal petiolate or sessile, 10–25 × 0.5–1 cm; cauline sessile, 1–25 × 0.2–1 cm (distal smaller), bases attenuate. Heads mostly borne singly. Phyllaries to 1 cm (spreading to reflexed). Receptacles hemispheric to ovoid; paleae 4–5 mm, (apical margins glabrous) apices acuminate-cuspidate, awn-tipped, abaxial tips sparsely strigose. Ray florets 8–16; corollas orangish red to maroon, laminae elliptic to obovate, 10–25 × 3–6 mm, abaxially sparsely strigose. Discs 10–15 × 8–15 mm. Disc florets 50–300+; corollas proximally maroon, distally brown-purple, 3.9–4.4 mm; style branches ca. 1.8 mm, apices obtuse to rounded. Cypselae 2–3 mm; pappi coroniform, to 0.5 mm. 2n = 38.
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Diagnostic Description

Synonym

Echinacea atrorubens (Nuttall) Nuttall var. graminifolia Torrey & A. Gray, Fl. N. Amer. 2: 306. 1842
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Ecology

Habitat

Comments: Wet pine savannas and flatwoods, borders of shrub-tree bogs or bays, open bogs, grassy cypress-gum depressions, often in shallow water (Godfrey and Wooten 1981).

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N3 - Vulnerable

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NatureServe Conservation Status

Rounded Global Status Rank: G3 - Vulnerable

Reasons: Endemic to five counties of the Florida panhandle but locally rather common in its preferred habitat. Also reported from Georgia, but distribution unknown.

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Notes

Comments

Rudbeckia graminifolia grows in the Apalachicola region.
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