Eupatorium rotundifolium var. rotundifolium

Endemic
Treatment appears in FNA Volume 21. Treatment on page 473. Mentioned on page 472.

Leaf-blades 3-nerved from bases, 20–43 × 13–35 mm, broadest near bases, bases broadly subtruncate to broadly cuneate, margins crenate. 2n = 20, 30.


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

Distribution

V21-1185-distribution-map.gif

Ala., Ark., Del., Fla., Ga., Ind., Ky., La., Md., Mass., Miss., N.J., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va.

Discussion

Variety rotundifolium includes both sexual diploids and apomictic polyploids, which are morphologically not distinguishable. The sexual diploids are somewhat more restricted geographically, occurring in a band across northern Florida and southern Georgia.

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 +
Linnaeus +
puberulent +
broadly subtruncate +  and broadly cuneate +
enlarged +
13mm;35mm +
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. +, Del. +, Fla. +, Ga. +, Ind. +, Ky. +, La. +, Md. +, Mass. +, Miss. +, N.J. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
10–200+ m +
puberulent +  and villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist, low ground, roadsides, margins of ponds, 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 +
2 cm20 mm <br />0.02 m <br /> (4.3 cm43 mm <br />0.043 m <br />) +
subsessile +  and sessile +
triangular +
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 />) +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
puberulent +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Eupatorium rotundifolium var. rotundifolium +
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 +