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Vernonia texana (A. Gray) Small  
Family: Asteraceae
Texas Ironweed
[Vernonia angustifolia var. texana A. Gray]
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  • FNA
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John L. Strother in Flora of North America (vol. 19, 20 and 21)
Plants 4-8(-10+) dm. Stems puberulent, glabrescent. Leaves basal and cauline; blades ovate-lanceolate (basal) to narrowly lanceolate (distal), 5-12+ cm × (5-)12-25+ mm, l/w = 3-5 (basal) or 8-17 (distal), abaxially glabrate (pitted, awl-shaped hairs in pits), adaxially puberulent and/or scabrellous. Heads in open, paniculiform-scorpioid arrays. Peduncles 1-35 mm. Involucres ± obconic to hemispheric, 4.5-6 × 5-7 mm. Phyllaries 35-45+ in 5-6+ series, glabrescent, margins arachno-ciliolate, the outer lance-deltate, 1-32 mm, inner oblong to linear, 4-5(-6) mm, tips acute or rounded-apiculate. Florets 12-24+. Cypselae 2-3 mm; pappi usually whitish to stramineous (rarely purplish), outer scales or bristles 20+, 0.3-1+ mm, contrasting or intergrading with 20+, 6-7+ mm inner subulate scales or bristles. 2n = 34. Flowering Jun-Aug. Pinelands, scrub oak woodlands, sandy or sandy-clay soils; 60-200 m; Ark., La., Miss., Okla., Tex.
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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