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Eupatorium linearifolium Walter  
Go To Encyclopedia of Life...
Family: Asteraceae
Waxy Thoroughwort
Eupatorium linearifolium image
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Kunsiri Chaw Siripun, Edward E. Schilling in Flora of North America (vol. 21)
Perennials, 30-100+ cm. Stems (from short caudices) single or multiple, branched at or near bases, pubescent throughout. Leaves usually opposite (distal sometimes alternate); sessile or subsessile; blades 3-nerved distal to bases, oblong to lance-oblong, 20-45 × 5-10 mm, bases cuneate, margins entire or serrate (teeth mostly proximal), apices acute, faces finely puberulent, gland-dotted. Heads in corymbiform arrays. Phyllaries 8-10 in 1-2 series, lanceolate (tapering toward apices), 2-5 × 0.5-1 mm, apices rounded to acute, abaxial faces puberulent, gland-dotted. Florets 5; corollas 3-3.5 mm. Cypselae 2.5-3 mm; pappi of 30-40 bristles 3-5 mm. 2n = 20, 30, 40. Flowering Jul-Sep. Dry, sandy soils, pine and oak woods, old fields; 20-100+ m; Ala., Del., Fla., Ga., Miss., N.C., S.C., Tex. Plants treated here as Eupatorium linearifolium were long treated under the name E. cuneifolium; the latter name was superfluous when published (K. N. Gandhi and R. D. Thomas 1991). Because there appears to be a continuous range of variation between diploids that were referred to by V. I. Sullivan (1972) as E. cuneifolium and the series of putative hybrids (with E. hyssopifolium suggested as the other parent) that she called E. linearifolium, these are combined here. The tendency for the plants to branch at or near the bases is distinctive within Eupatorium.

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Eupatorium linearifolium
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Kathy M. Davis, University of Florida Herbarium  
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The National Science Foundation
Developments of SEINet, Symbiota, and associated specimen databases have been supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)