Perennials or subshrubs (shrubs), 60–100 cm. Stems mostly sparsely puberulent (hairs upcurved or apically bent). Leaves mostly opposite, sometimes subopposite to alternate on distal 1/3 of stems; petioles 2–8 (–12) mm; blades lanceolate, mostly 3–8 (–11) × 1–3 cm, bases rounded, margins entire or shallowly crenate, apices acuminate, abaxial faces eglandular, adaxial glabrous. Involucres 4.5–5.5 mm. Phyllaries: outermost narrowly lanceolate, glabrous, margins hyaline on proximal 2/3, eciliate. Corollas usually white, sometimes purple-tinged to yellowish, 2.5–3 mm, lobes glandular. Cypselae 1.8–2.8 mm, sparsely hispidulous. 2n = 20.

Phenology: Flowering (Jun–)Sep–Nov(–Dec).
Habitat: Canyon walls, ledges, slopes, talus, limestone hills and ridges, on and among rocks, in woods along streams
Elevation: 700–1600 m

Distribution

• Generated Map
• Legacy Map

Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (Zacatecas)

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.