Difference between revisions of "Eupatorium petaloideum"
Bull. Torrey Bot. Club 24: 492. 1897.
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|elevation=20–100+ m | |elevation=20–100+ m | ||
|distribution=Ala.;Fla.;Ga.;Miss. | |distribution=Ala.;Fla.;Ga.;Miss. | ||
| − | |discussion=<p>Eupatorium petaloideum is commonly combined with E. album; it has recently been separated as a distinct variety. V. I. Sullivan (1972) found the two taxa to be distinct chemically and to occupy different habitats. In both, the involucral bracts are white and long-acuminate or mucronate; those of E. petaloideum are almost entirely devoid of any pubescence including glands and those of E. album have both simple and glandular hairs.</p> | + | |discussion=<p><i>Eupatorium petaloideum</i> is commonly combined with <i>E. album</i>; it has recently been separated as a distinct variety. V. I. Sullivan (1972) found the two taxa to be distinct chemically and to occupy different habitats. In both, the involucral bracts are white and long-acuminate or mucronate; those of <i>E. petaloideum</i> are almost entirely devoid of any pubescence including glands and those of <i>E. album</i> have both simple and glandular hairs.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1897 | |publication year=1897 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_1179.xml |
|tribe=Asteraceae tribe Eupatorieae | |tribe=Asteraceae tribe Eupatorieae | ||
|genus=Eupatorium | |genus=Eupatorium | ||
Revision as of 15:30, 18 September 2019
Perennials, 30–70 cm. Stems (from short, stout rhizomes) single, branched distally, puberulent. Leaves usually opposite (distal sometimes alternate); sessile; blades pinnately nerved, elliptic to ovate, 20–80 × 10–30 mm, bases cuneate, margins serrate to crenate-serrate, apices rounded to acute, faces sparsely villous (abaxial), glabrate (adaxial), little, if at all, gland-dotted. Heads in corymbiform arrays. Phyllaries 9–15 in 2–4 series, linear, 4–10 × 0.6–1 mm, apices (white) acuminate to attenuate, strongly mucronate, abaxial faces glabrous, not gland-dotted. Florets (4–)5; corollas 3–3.5 mm. Cypselae 2.5–3 mm; pappi of 40–50 bristles 3.5–4 mm. 2n = 20.
Phenology: Flowering Jul–Sep.
Habitat: Upland scrub oak and longleaf pinewoods, fine textured, loamy soils
Elevation: 20–100+ m
Distribution
Ala., Fla., Ga., Miss.
Discussion
Eupatorium petaloideum is commonly combined with E. album; it has recently been separated as a distinct variety. V. I. Sullivan (1972) found the two taxa to be distinct chemically and to occupy different habitats. In both, the involucral bracts are white and long-acuminate or mucronate; those of E. petaloideum are almost entirely devoid of any pubescence including glands and those of E. album have both simple and glandular hairs.
Selected References
None.