Marshallia trinervia (Walter) Trel.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Glabrous, ± colonial from short-creeping rhizomes, the stems 4–8 dm; lvs thin, strongly trinerved, mostly 5–10 × 1–3.5 cm, equably distributed, the lower oblanceolate or spatulate, petiolate, obtuse or rounded, often deciduous before anthesis, those above fully as large, lance-ovate or lance-elliptic to ovate, acuminate or acute, sessile or nearly so; internodes 10–25; heads 2–3 cm wide in fl, solitary (few) on a terminal peduncle 1–2 dm; receptacular and invol bracts acute; 2n=18. Woods, streambanks, and cliffs, often on calcareous clay; Va. to S.C., Tenn., and La. May, June.
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Common Names
Colonial Barbara's butttons