Overview

Distribution

National Distribution

Canada

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: Var grandifolia chiefly Ozarks or Ouachitas,(Arkansas and northwest Louisiana to Missouri, Kansas and Texas, isolated in ridge & valley region of Georgia. Var. alismaefolia, Arkansas, to Louisiana and Texas.

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Physical Description

Morphology

Description

Perennials, to 120 cm (roots fibrous, caudices often woody). Stems proximally glabrous or sparsely hairy (hairs spreading), distally strigose (hairs ascending). Leaves: blades elliptic, lanceolate, or ovate (± conduplicate, not lobed), bases cuneate to rounded, margins entire or remotely serrate, apices acute, faces strigose, abaxially gland-dotted; basal petiolate, 10–35 × 2–11 cm; cauline petiolate (proximal) to nearly sessile (distal), 4–30 × 1.5–9 cm. Heads mostly borne singly. Phyllaries to 15 mm (strigose and gland-dotted). Receptacles hemispheric to ovoid; paleae 5–6.5 mm, (apical margins glabrous) acuminate-cuspidate, awn-tipped, abaxial tips sparsely strigose. Ray florets 12–25; laminae elliptic to obovate (reflexed), 20–50 × 5–10 mm, abaxially hairy and gland-dotted. Discs 10–30 × 15–25 mm. Disc florets 200–800+; corollas greenish yellow basally and in lobes, otherwise maroon, 3.5–5 mm; style branches ca. 1.8 mm, apices obtuse. Cypselae 2–3 mm; pappi coroniform, to 0.5 mm.
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Diagnostic Description

Synonym

Centrocarpha grandiflora Sweet, Brit. Fl. Gard., ser. 2, 1: plate 87. 1831
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Ecology

Habitat

Comments: Prairies, open places, and dry woods.

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 81 to >300

Comments: Not tracked by ARHP(S5), LAHP (S5) or TXHP (S4S5). GAHP now tracking as (S1?).

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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNA - Not Applicable

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

Reasons: Ranked S5 by ARHP, LAHP; S4S5 by TXHP; S1? by GAHP, S2? by KSHP, S? by MOHP(watch list), S1 by MSHP.

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Threats

Comments: Common threats to all habitats.

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