Acalypha gracilens

A. Gray

Manual, 408. 1848. 1848

Common names: Slender threeseeded mercury
WeedyIllustratedEndemic
Synonyms: Acalypha gracilens var. delzii Lillian W. Miller A. gracilens var. fraseri (Müller Arg.) Weatherby
Treatment appears in FNA Volume 12. Treatment on page 171. Mentioned on page 164, 172.

Herbs, annual, 1–6 dm, monoecious. Stems erect, pubescent. Leaves: petiole 0.2–1.2 (–1.8) cm; blade oblong-lanceolate to linear-lanceolate, 1.7–6 × 0.4–2 cm, base cuneate, margins serrate to crenate to subentire, apex obtuse to acute. Inflorescences bisexual, axillary; peduncle 0.1–0.6 cm, pistillate portion 0.7–1.3 × 0.8–1.5 cm or pistillate bract solitary, staminate portion 0.2–2.6 cm; allomorphic pistillate flowers absent. Pistillate bracts loosely arranged to crowded (inflorescence axis clearly to scarcely visible between bracts) or solitary, 8–14 × 11–17 mm, abaxial surface sparsely pubescent, red sessile-glandular, and sometimes stipitate-glandular; lobes (7–) 9–13 (–15), deltate, 1/10–1/4 bract length. Pistillate flowers: pistil 3-carpellate; styles multifid or laciniate. Capsules smooth, pubescent. Seeds 1.1–1.9 mm, minutely pitted.


Phenology: Flowering and fruiting mostly summer–fall.
Habitat: Pine and pine-oak woods, dry hardwood forests, glades, prairies, disturbed areas, usually on sand or shallow rocky soils.
Elevation: 0–1100 m.

Distribution

V12 280-distribution-map.jpg

Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Ky., La., Maine, Md., Mass., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

Acalypha gracilens varies considerably throughout its range; some of the extremes have been named. The variation shows no discrete breaks and no infraspecific taxa warrant recognition (G. A. Levin 1999). Populations in central Illinois, Indiana, and Iowa have been alleged to be introduced, but they show slight morphological differences from other populations and appear to be native. Acalypha gracilens is introduced in Wisconsin. See 16. A. virginica for a discussion of the differences between A. gracilens and that species.

Selected References

None.

Lower Taxa

None.

"elongated" is not a number.

... more about "Acalypha gracilens"
stipitate-glandular +  and pubescent +
Geoffrey A. Levin +
A. Gray +
cuneate +
1.7 cm17 mm <br />0.017 m <br /> (6 cm60 mm <br />0.06 m <br />) +
oblong-lanceolate;linear-lanceolate +
0.4cm;2cm +
loosely arranged +  and crowded or solitary +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (?) +  and 1.7 cm17 mm <br />0.017 m <br /> (?) +
thread-like +
Slender threeseeded mercury +
Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, La. +, Maine +, Md. +, Mass. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–1100 m. +
Pine and pine-oak woods, dry hardwood forests, glades, prairies, disturbed areas, usually on sand or shallow rocky soils. +
drought-deciduous +  and persistent +
deltate +
palmate +  and pinnate +
dentate +, serrate +  and entire +
serrate +  and crenate +
allomorphic +, pistillate +  and staminate +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
connate;distinct +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering and fruiting mostly summer–fall. +
staminate +  and pistillate +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
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 +, Illustrated +  and Endemic +
deciduous +  and persistent +
connate +  and distinct +
laciniate +  and multifid +
Acalypha gracilens var. delzii +  and A. gracilens var. fraseri +
Acalypha gracilens +
Acalypha +
species +
spikelike +