Argythamnia argyraea
Argythamnia brandegeei
silky silverbush, silvery wild-Mercury
Brandegee's silverbush, Sonoran silverbush
erect, densely hairy, hairs silvery, malpighiaceous.
stipules deciduous, oblanceolate or obovate to ovate, 0.2–0.3 mm, margins not glandular;
petiole 1–3 mm;
blade elliptic to ovate, 0.9–4 × 0.4–0.8 cm, margins entire, without glands, surfaces densely hairy, hairs silvery, malpighiaceous.
unisexual, pistillate 0.5–1 cm, flowers solitary, staminate 1–2 cm;
bracts ovate to elliptic, 0.4–0.5 mm, margins without glands.
usually releasing pink dye when wetted.
sepals linear to lanceolate, 2–5 × 0.3–2 mm;
petals linear-lanceolate, 3–5 × 0.5–0.6 mm, free from androphore;
nectary glands ovate, 0.1–0.2 × 0.1 mm, free from androphore, glabrous;
stamens 10, staminodes 5, punctiform, glabrous.
sepals elliptic, 3–4.3 × 0.8–2 mm, without glands;
petals 5, lanceolate to linear, 1.5–2 × 0.3–0.5 mm;
nectary glands oblong to linear, 0.8 × 0.5 mm, glabrous;
ovary hispidulous;
styles 1–1.7 mm, pilose;
stigmas flattened.
4–5 mm, hairs adpressed, short, silvery.
2.3–2.5 mm, finely papillate.
Argythamnia argyraea
Argythamnia brandegeei
There are very few collections of Argythamnia argyraea, which is endemic to south Texas in Kinney, La Salle, and Maverick counties. Plants of Argythamnia argyraea are usually dioecious, but William Mahler found that larger plants are occasionally monoecious (J. Poole, pers. comm.).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (1 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
