Acalypha ostryifolia

Riddell ex J. M. Coulter

Mem. Torrey Bot. Club 5: 213. 1894. 1894

Common names: Hophornbeam copperleaf pineland threeseeded mercury
WeedyIllustrated
Treatment appears in FNA Volume 12. Treatment on page 167. Mentioned on page 164.

Herbs, annual, 3.5–7 dm, monoecious. Stems erect, pubescent, sparsely hirsute, and stipitate-glandular. Leaves: petiole 1.5–6.5 cm; blade ovate, 3–8 × 1.5–5 cm, base cordate, margins serrate, apex acute to short acuminate. Inflorescences unisexual, axillary (staminate) and terminal (pistillate; sometimes on short lateral branches, appearing axillary); staminate peduncle 0.5–1.5 cm, fertile portion 0.5–3.5 cm; pistillate peduncle 0.1–1 cm, fertile portion 3–7 × 0.7–1 cm; allomorphic pistillate flowers common, near apices of pistillate inflorescences. Pistillate bracts (normal and allomorphic flowers) loosely arranged (inflorescence axis visible between bracts), 3–6 × 6–8 mm, abaxial surface pubescent (hairs to 0.3 mm) and sparsely stipitate-glandular; lobes (9–) 13–17, linear, 2/3 bract length, muricate. Pedicels of allomorphic flowers rudimentary. Pistillate flowers: pistil 3-carpellate (normal flowers), 1 (–3) -carpellate (allomorphic flowers); styles multifid or laciniate. Capsules spiny, pubescent; allomorphic fruits obovoid, 2 irregular flanges near apex, 2–2.2 × 1.6–1.8 mm, smooth, pubescent. Seeds 1.6–2 mm, tuberculate.


Phenology: Flowering and fruiting summer–fall.
Habitat: Stream banks, edges of woods, disturbed areas, agricultural fields.
Elevation: 0–1700 m.

Distribution

Ala., Ariz., Ark., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Miss., Mo., Nebr., N.C., Ohio, Okla., S.C., Tenn., Tex., Va., W.Va., Mexico, West Indies, to Central America

Discussion

J. Torrey [in W. H. Emory 1857–1859, vol. 2(1)] reported Acalypha ostryifolia (as A. caroliniana Elliott) from New Mexico on the basis of Bigelow s.n., collected near "the Copper Mines" in Grant County. Although no specimen has been located by the author and this is the only report of this species from New Mexico, it is to be expected in the southwestern part of the state. It was collected in the late nineteenth century in New Jersey and Pennsylvania, but has not been collected there since.

Acalypha ostryifolia may not be native to the northern part of its range. Specimen collection dates suggest that the species is spreading northward, and in much of its range it is found primarily in areas with human disturbance.

Selected References

None.

Lower Taxa

None.

"elongated" is not a number.No values specified."dm" is not declared as a valid unit of measurement for this property.

... more about "Acalypha ostryifolia"
stipitate-glandular +  and pubescent +
Geoffrey A. Levin +
Riddell ex J. M. Coulter +
cordate +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1.5cm;5cm +
0.6 cm6 mm <br />0.006 m <br /> (?) +  and 0.8 cm8 mm <br />0.008 m <br /> (?) +
thread-like +
Hophornbeam copperleaf +  and pineland threeseeded mercury +
Ala. +, Ariz. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Nebr. +, N.C. +, Ohio +, Okla. +, S.C. +, Tenn. +, Tex. +, Va. +, W.Va. +, Mexico +, West Indies +  and to Central America +
0–1700 m. +
0.2 cm2 mm <br />0.002 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Stream banks, edges of woods, disturbed areas, agricultural fields. +
drought-deciduous +  and persistent +
2/3;13;17 +
palmate +  and pinnate +
crenate +  and subentire +
allomorphic +, pistillate +  and staminate +
pistillate +  and staminate +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
connate;distinct +
1.5 cm15 mm <br />0.015 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
Flowering and fruiting summer–fall. +
1(-3)-carpellate +  and 3-carpellate +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Mem. Torrey Bot. Club +
tuberculate +
ellipsoid +  and subglobose +
not petaloid +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Weedy +  and Illustrated +
deciduous +  and persistent +
connate +  and distinct +
laciniate +  and multifid +
Acalypha ostryifolia +
Acalypha +
species +
spikelike +