Flora of North America species comparison

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Acalypha wilkesiana

Acalypha monococca

beefsteak plant, match-me-if-you-can, painted copperleaf, wilkes' acalypha

oneseed Mercury, slender threeseed Mercury
Habit Shrubs, 20–50 dm, monoecious. Herbs, annual, 1–4 dm, monoecious.
Stems

erect, sparsely to densely pubescent, not glandular.

erect, pubescent.
Leaves

persistent;

petiole 1–6 cm;

blade ovate to broadly ovate or suborbiculate, 9–20 × 4–15 cm, base obtuse to rounded or subcordate, margins serrate-crenate, apex acuminate.

petiole 0.2–1(–1.2) cm;

blade linear-lanceolate to linear, 1.7–6(–7) × 0.3–1.2 cm, base cuneate, margins usually subentire, sometimes shallowly serrate, apex acute.
Inflorescences

usually unisexual, rarely bisexual, axillary;

staminate peduncle 0.1–1.5 cm, fertile portion 10–20 cm;

pistillate peduncle 1–2 cm, fertile portion 4–15 × 0.5–0.8 cm;

bisexual similar to staminate, with 1–2 pistillate bracts near base;

allomorphic pistillate flowers absent.

bisexual, axillary;

peduncle 0.1–0.6 cm, pistillate portion 0.6–1.2 × 0.8–1.5 cm or pistillate bract solitary, staminate portion 0.1–2.5 cm;

allomorphic pistillate flowers absent.
Pistillate flowers

pistil 3-carpellate;

styles multifid or laciniate.

pistil 1-carpellate;

styles multifid or laciniate.
Capsules

unknown.

smooth, pubescent.
Seeds

unknown.

1.6–2.4 mm, shallowly pitted.
Pistillate

bracts loosely arranged (inflorescence axis visible between bracts), 2–4 × 3–5 mm, abaxial surface sparsely to moderately pubescent;

lobes 7–9, ovate to lanceolate, 1/4 bract length, except terminal lobe to 1/2 bract length.

bracts loosely arranged to crowded (inflorescence axis clearly to scarcely visible between bracts) or solitary, 8–13 × 11–16 mm, abaxial surface sparsely to densely pubescent, red sessile-glandular, and rarely stipitate-glandular;

lobes (7–)9–13(–17), deltate, 1/10–1/4 bract length.

Acalypha wilkesiana

Acalypha monococca
Phenology Flowering spring–fall. Flowering and fruiting summer–fall.
Habitat Old home sites, disturbed areas. Pine and oak woods, prairies, barrens, on sandy or shallow rocky soils.
Elevation 0–10 m. (0–0 ft.) 80–600 m. (300–2000 ft.)
Distribution
from FNA
FL; Pacific Islands [Introduced in North America; introduced also in Mexico, West Indies, Central America, n South America, se Asia, Africa]
from FNA
AR; IL; KS; KY; LA; MO; OK; TX
[WildflowerSearch map]
[BONAP county map]
Discussion

Acalypha wilkesiana is not known in the wild, but presumably originated in the southwestern Pacific Islands (Bismarck Archipelago east to Fiji). The species is commonly cultivated as an ornamental for its leaves that may be various shades of green, purple, red, orange, and yellow (sometimes variegated), and sometimes contorted into unusual shapes. Despite low seed set, it occasionally becomes naturalized in tropical and subtropical areas. Naturalized plants often lack the distinctive leaf coloration found in cultivated plants. Although sometimes treated as A. amentacea subsp. wilkesiana, DNA sequence data show that A. wilkesiana and A. amentacea are distinct species (V. G. Sagun et al. 2010).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Even when fruits have dehisced, Acalypha monococca is easily distinguished from A. gracilens and all other species in the genus by its curved, needlelike columellae.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 165. FNA vol. 12, p. 171.
Parent taxa Euphorbiaceae > Acalypha Euphorbiaceae > Acalypha
Sibling taxa
A. alopecuroidea, A. arvensis, A. australis, A. californica, A. chamaedrifolia, A. deamii, A. gracilens, A. monococca, A. monostachya, A. neomexicana, A. ostryifolia, A. phleoides, A. poiretii, A. radians, A. rhomboidea, A. setosa, A. virginica
A. alopecuroidea, A. arvensis, A. australis, A. californica, A. chamaedrifolia, A. deamii, A. gracilens, A. monostachya, A. neomexicana, A. ostryifolia, A. phleoides, A. poiretii, A. radians, A. rhomboidea, A. setosa, A. virginica, A. wilkesiana
Synonyms A. amentacea subsp. wilkesiana A. gracilens var. monococca, A. gracilens subsp. monococca
Name authority Müller Arg.: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 15(2): 817. (1866) (Engelmann ex A. Gray) Lillian W. Miller & Gandhi: Sida 13: 123. (1988)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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