Eupatorium godfreyanum

Cronquist

Brittonia 37: 238, fig. 1. 1985.

Common names: Godfrey’s thoroughwort
Endemic
Treatment appears in FNA Volume 21. Treatment on page 467. Mentioned on page 464, 468, 472.

Perennials, 60–100+ cm. Stems (from short caudices) single or multiple, sparsely branched distally, puberulent throughout. Leaves usually opposite (distal sometimes alternate, spreading or horizontal); sessile; blades pinnately nerved, elliptic or lanceovate to narrowly ovate, 50–100 × 15–40 mm, bases rounded to cuneate (not connate-perfoliate), margins serrate, apices acute, faces puberulent or villous, glanddotted. Heads in corymbiform arrays. Phyllaries 7–10 in 2–3 series, lanceolate (tapering at tips), 2–6 × 1–1.5 mm, apices acute, not mucronate, abaxial faces puberulent, glanddotted. Florets (4–) 5; corollas 3–3.5 mm. Cypselae 2–3 mm; pappi of 20–50 bristles 3.5–4.5 mm. 2n = 30, 40.


Phenology: Flowering Jul–Sep.
Habitat: Dry, open, disturbed sites, edges of deciduous woods
Elevation: 20–300+ m

Distribution

V21-1166-distribution-map.gif

Ky., Md., N.J., N.C., Ohio, Va., W.Va.

Discussion

Eupatorium godfreyanum is an apomictic polyploid derivative that includes genomes from E. rotundifolium and E. sessilifolium. Although it is relatively narrow in distribution, it is known to occur in localities where both progenitor species are absent and it seems to be persistent where it occurs. Eupatorium vaseyi Porter has been misapplied to E. godfreyanum.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Eupatorium godfreyanum"
not tailed +, truncate +, rounded +  and obtuse +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
diffuse +  and dense +
indeterminate +  and determinate +
Kunsiri Chaw Siripun +  and Edward E. Schilling +
Cronquist +
puberulent +
rounded +  and cuneate +
enlarged +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dissected +, lobed +, toothed +  and entire +
lanceovate;narrowly ovate +
15mm;40mm +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
filiform +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Godfrey’s thoroughwort +
pinkish +  and white +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
prismatic +
fertile +  and bisexual +
Ky. +, Md. +, N.J. +, N.C. +, Ohio +, Va. +  and W.Va. +
20–300+ m +
villous +  and puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, open, disturbed sites, edges of deciduous woods +
in usually determinate , rarely indeterminate , arrays +  and singly +
indeterminate +
each +  and sessile +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
obconic;ellipsoid +
triangular +
2-carpellate +
persistent +
Flowering Jul–Sep. +
nerved +  and 2-3-nerved +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
7 +  and 10 +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
multiple +  and single +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Eupatorium godfreyanum +
Eupatorium +
species +
campanulate +
toothed +  and entire +
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
vine +, shrub +  and subshrub +