Chamaesaracha coniodes
Chamaesaracha villosa
gray false nightshade, gray five eyes
trans-Pecos five eyes
pubescent, viscid, hairs simple, dendritic in some populations, especially in s Texas, eglandular and glandular.
villous, hairs mostly elongate, frequently 1-branched at tip, eglandular.
decumbent to ± prostrate, pale green, 1–3 dm.
decumbent, pale green, (1.5–)2–5 dm.
subsessile;
blade linear-lanceolate or oblanceolate to rhombic, 2–6 × 0.5–2 cm, length 3–4 times width, margins shallowly to deeply lobed (occasionally only a few shallow lobes).
petiole to 1/4 total leaf length;
blade ovate to broadly rhombic, 4–6 × 1.5–3.5 cm, length 2–2.5 times width, margins crenate or entire.
1–5-flowered.
1–5-flowered.
calyx 4–5 mm, densely pubescent, hairs mostly relatively long;
corolla 5–15 mm diam.
calyx 5–7 mm, densely pubescent, hairs mostly relatively long;
corolla 5–15 mm diam.
8–10 mm diam. 2n = 48.
8–10 mm diam. 2n = 24.
Chamaesaracha coniodes
Chamaesaracha villosa
Chamaesaracha coniodes is highly variable in leaf shape, vestiture, and stature. It is similar to C. darcyi and C. coronopus. Some populations are similar to C. sordida. The variation and its significance were discussed by J. E. Averett (2010b). J. Henrickson (2009) recognized C. texensis, which has simple hairs and may also have an understory of glandular hairs, as distinct from the type of C. coniodes, which has only dendritic hairs; this is part of the variability across the range of the species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Chamaesaracha villosa occurs within 30–40 miles of the Rio Grande River in Trans-Pecos Texas and adjacent Mexico. It is robust and villous, with branching stems forming mounds 1 m across; it is most similar to C. crenata, with which it is easily confused. The principal characters to distinguish the two species are leaf shape and vestiture. The similarities and differences were discussed by J. E. Averett (2010).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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