Herbs, perennial, with woody taproot. Stems fascicled, spreading, branching throughout, 1–4.5 dm. Leaves alternate; stipules linear, to 1 mm; petiole absent; blade usually obovate-spatulate, rarely narrowly elliptic, 1–-4 × 0.5–1.5 cm, base cuneate, margins coarsely spinulose-dentate, teeth without prominent blackened tips, not incurved, apex rounded to obtuse; midrib prominent, secondary-veins obscure. Inflorescences pedunculate, 2.5–-5 cm; staminate flowers ± widely spaced, 1 per node; pistillate flowers 3–4, widely spaced; bracts ovate, 1 mm, apex mucronate, glands patelliform, ± sessile, 0.7 mm diam. Staminate flowers: calyx 1 mm. Pistillate flowers: sepals fugacious, 3, minute; styles connate only at base, 1.5 mm. Capsules ovoid-pyriform, 4 × 5 mm, deeply 3-lobed; lobes of gynobase to 1 mm; columella persistent. Seeds gray to black, ellipsoid, 2.5 × 2 mm, smooth; caruncle minute.

Phenology: Flowering Mar–May; fruiting (Mar–)Apr–Jul(–Dec).
Habitat: Calcareous sandy soils, gravelly soils, and uplands.
Elevation: 0–1000 m.

Distribution

• Generated Map
• Legacy Map

Tex., Mexico (Coahuila), Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

Stillingia treculiana is known in the flora area from the western Edwards Plateau south to the lower Rio Grande valley.

Selected References

None.

Lower Taxa

None.

"connate" is not a number. "distinct" is not a number."dm" is not declared as a valid unit of measurement for this property.