Perityle
Family: Asteraceae
Perityle image
Sue Carnahan
  • FNA
  • Resources
Sharon C. Yarborough, A. Michael Powell in Flora of North America (vol. 21)
Annuals, perennials, subshrubs, or shrubs, 2-45(-75) cm (glabrous or hairy, often gland-dotted). Stems erect to pendent. Leaves mostly cauline; often proximally opposite, distally alternate; petiolate or sessile; blades usually 3-lobed, ultimate margins entire, toothed, or lobed. Heads radiate or discoid, borne singly or in corymbiform arrays. Involucres campanulate, cylindric, funnelform, or hemispheric, 3-15 mm diam. Phyllaries persistent, 5-28 in (1-)2(-3) series (distinct, linear to ovate, equal or subequal, flat or keeled, glabrous or hairy, apices obtuse, acute, or attenuate). Receptacles flat or convex, pitted, epaleate. Ray florets 0, or (1-)3-18, pistillate, fertile; corollas cream, yellow, or white (showy or rudimentary). Disc florets 5-200, bisexual, fertile; corollas cream, yellow, or white, tubes shorter than or nearly equal to cylindric, funnelform, or campanulate throats, lobes 4, ± deltate (acute; stamens 4; style branches flattened, linear, usually tapering to fine, minutely hairy tips). Cypselae (black) flattened to subcylindric, linear to oblanceolate or obovate (margins ± calloused and glabrous, hairy, or ciliate, faces usually hairy, sometimes glabrous); pappi 0, or persistent or falling, of 1-35 bristles plus callous crowns or hyaline scales. x = 17, 19. Most species of Perityle are rock-dwelling subshrubs exhibiting geographic speciation; most are found in the eroded mountain and basin region of the southwestern United States.

Species within inventory project: Intermountain Regional Herbarium Network
Perityle congesta
Image of Perityle congesta
Perityle emoryi
Image of Perityle emoryi
Perityle gracilis
Image of Perityle gracilis
Perityle intricata
Image of Perityle intricata
Perityle megalocephala
Image of Perityle megalocephala
Perityle specuicola
Image of Perityle specuicola
Perityle stansburyi
Image of Perityle stansburyi
Perityle tenella
Image of Perityle tenella