Flora of North America species comparison

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Argythamnia aphoroides

Hill country silverbush
Habit Herbs, perennial, monoecious or dioecious, to 5 dm.
Stems

erect to ascending, hairy, hairs malpighiaceous.
Leaves

stipules deciduous, linear-lanceolate, to 1 mm, margins not glandular;

petiole absent;

blade elliptic, 1.5–4 × 0.6–2 cm, margins entire, without glands, surfaces hairy, hairs malpighiaceous.
Inflorescences

unisexual, 3–8 cm;

bracts linear-lanceolate, 2–4.5 mm, margins without glands.
Flowers

without pink dye when wetted.
Staminate flowers

sepals lanceolate to narrowly elliptic, 4–5.5 × 1.1–1.4 mm;

petals cuneate-elliptic to cuneate-obovate, 3.3–4 × 1.6–3 mm, free from androphore;

nectary glands oblong, 0.4–0.5 × 0.3–0.4 mm, adnate to androphore, glabrous;

stamens 10, staminodes 0.
Pistillate flowers

sepals lanceolate to elliptic, 6–7 × 1.7–3.2 mm, without glands;

petals 0 or 5, linear, 0–1.7 mm;

nectary glands oblong, 0.5 × 0.7 mm, glabrous;

ovary tomentose to lanulose;

styles 1.5–3 mm, tomentose;

stigmas flattened.
Capsules

7–9 mm, tomentose to lanulose.
Seeds

3.7–5 mm, smooth, lightly tuberculate, or striate.

Argythamnia aphoroides
Phenology Flowering Jan–Jul.
Habitat Bluestem-grama grasslands, oak woodlands, calcareous, often rocky, clay or loam soils.
Elevation 300–600 m. (1000–2000 ft.)
Distribution
from FNA
TX
[BONAP county map]
Discussion

Argythamnia aphoroides is restricted to the Edwards Plateau.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 174.
Parent taxa Euphorbiaceae > Argythamnia
Sibling taxa
A. adenophora, A. argothamnoides, A. argyraea, A. brandegeei, A. claryana, A. cyanophylla, A. humilis, A. lanceolata, A. mercurialina, A. serrata, A. simulans
Synonyms Ditaxis aphoroides
Name authority Müller Arg.: Linnaea 34: 146. (1865) — (as Argyrothamnia)
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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