familyAsteraceae
genusKoanophyllon
Koanophyllon solidaginifolium
Phytologia 22: 151. 1971.
Common names: Shrubby umbrella thoroughwort
Basionym: Eupatorium solidaginifolium A. Gray Smithsonian Contr. Knowl. 3(5): 87. 1852
Treatment appears in FNA Volume 21. Treatment on page 542.
Revision as of 21:10, 5 November 2020 by imported>Volume Importer
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
Tex., Mexico (Chihuahua, Coahuila, Durango, Zacatecas).
Discussion
Selected References
None.
Lower Taxa
None.