Gumhead

Selloa glutinosa Sprengel, Novi Provent., 36. 1818

Leaves mostly 25–50 mm, relatively even in lengths to heads. Involucres 3–3.8 mm. Ray corollas 2–3 mm. Cypselae 1–1.4 mm. 2n = 16.

Flowering (Apr–)Jun–Nov(–Dec). Gravelly, sandy, or loamy flats, rocky slopes, crevices and ledges, streambeds, creosote bush to pinyon-juniper and pine-oak-maple; (300–)600–2300(–2700) m; Ariz., N.Mex., Tex.; Mexico (Chihuahua, Coahuila, Nuevo León, Tamaulipas, San Luis Potosí); Central America (Guatemala).