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Published In: Memoirs of the Torrey Botanical Club 5(14): 213. 1894. (Mem. Torrey Bot. Club) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


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4. Acalypha ostryifolia Riddell (roughpod copperleaf)

Map 1652, Pl. 376 d–f

Stems 10–70 cm long, often slightly zigzag above the midpoint, moderately to densely pubescent with short, strongly curved hairs, also with longer, straight hairs toward the tip, often many of these gland-tipped. Leaves short- to more commonly long-petiolate, the petiole (1/10–)1/5 as long as to slightly longer than the blade, much longer than the inflorescence bracts. Leaf blades 1–8 cm long, narrowly to broadly ovate or heart-shaped, those of at least some of the leaves shallowly cordate at the base (those of the others merely rounded), angled or tapered to a bluntly or sharply pointed tip, the margins with relatively numerous (18–36 on each side) closely spaced, usually sharp teeth, relatively thin-textured or somewhat thicker and stiffer, the surfaces (especially the undersurface) sparsely pubescent with straight to curved, more or less appressed hairs. Inflorescences of two types, the terminal spike with 5–20 nodes of pistillate flowers (1 or less commonly 2 bracts per node, 1 or rarely 2 pistillate flowers per bract), the axillary spikes 1 or rarely 2 per node, with few to several clusters of staminate flowers (rarely a few short pistillate spikes also in the upper leaf axils), the staminate spikes either lacking an inflorescence bract or with a minute, irregularly ovate bract. Pistillate bracts 3–12 mm long, appearing longitudinally concave around the pistillate flowers, with 13–17 linear or occasionally narrowly lanceolate lobes, the margins and outer surface of the lobes with moderate to dense, minute, sessile, yellowish glands and sometimes also sparse, stalked glands, the surface of the unlobed basal portion moderately to densely hairy with short, straight, spreading hairs, many of these gland-tipped, often also with sparse, sessile glands. Fruits 1.6–2.5 mm long, 3-locular, usually 3-seeded (rarely 1 of the ovules aborting), the surface with slender, elongate tubercles or projections, at least above the midpoint, otherwise glabrous or finely short-hairy, some of the hairs sometimes gland-tipped. Seeds 1.5–2.3 mm long. June–October.

Scattered mostly from the Missouri River floodplain southward (Pennsylvania to Florida west to Nebraska and Arizona). Banks of streams and rivers; also crop fields, fallow fields, gardens, railroads, roadsides, and open, disturbed areas.

This weedy species is found most commonly in disturbed habitats. It apparently has become much more abundant in the Missouri River floodplain in the years since Steyermark (1963) studied its distribution.



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