Eupatorium rotundifolium var. ovatum

(Bigelow) Torrey ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 178. 1836.

Endemic
Basionym: Eupatorium ovatum Bigelow Fl. Boston. ed. 2, 296. 1824
Synonyms: Eupatorium pubescens Muehlenberg ex Willdenow
Treatment appears in FNA Volume 21. Treatment on page 472. Mentioned on page 473.

Leaf-blades 3-nerved distal to bases, 30–70 × 30–60 mm, broadest near middles, bases broadly cuneate to cuneate, margins serrate. 2n = 20, 30.


Phenology: Flowering Jul–Aug.
Habitat: Moist, low ground, roadsides, sandy soils
Elevation: 10–200+ m

Distribution

V21-1184-distribution-map.gif

Ala., Ark., Conn., Del., D.C., Fla., Ga., Ky., La., Md., Mass., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Va., W.Va.

Discussion

Variety ovatum is an apomictic polyploid that may be a derivative of Eupatorium rotundifolium and E. sessilifolium. Morphologically, it is closer to E. rotundifolium than to E. sessilifolium; the name E. pubescens has priority at species rank.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

not tailed +, truncate +, rounded +  and obtuse +
acute;acute +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
diffuse +  and dense +
indeterminate +  and determinate +
Kunsiri Chaw Siripun +  and Edward E. Schilling +
(Bigelow) Torrey ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
puberulent +
broadly cuneate +  and cuneate +
enlarged +
30mm;60mm +
Eupatorium ovatum +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
dissected +, lobed +, toothed +  and entire +
ovate;less deltate;orbiculate +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
filiform +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pinkish +  and white +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
prismatic +
fertile +  and bisexual +
Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ky. +, La. +, Md. +, Mass. +, Miss. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Va. +  and W.Va. +
10–200+ m +
puberulent +  and villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist, low ground, roadsides, sandy soils +
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 +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
subsessile +  and sessile +
triangular +
crenate +  and serrate +
2-carpellate +
persistent +
Flowering Jul–Aug. +
nerved +  and 2-3-nerved +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
8 +  and 10 +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
puberulent +
appendaged +  and truncate +
hirsutulous +
papillate +
Eupatorium pubescens +
Eupatorium rotundifolium var. ovatum +
Eupatorium rotundifolium +
variety +
campanulate +
toothed +  and entire +
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
vine +, shrub +  and subshrub +