This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Low perennial herbs, with much branched leafy stems, sessile, rather rigid, narrow, entire leaves and small heads of both tubular and radiate white flowers, solitary at the ends of the numerous slender branchlets, involucre turbinate, its bracts well imbricated. Disk-flowers perfect, their corollas white, tubular-funnelform, 5-toothed. Ray-flowers numerous, white, or drying red to rose, pistillate. Style appendages acutish. Achenes elongated, flattened, hispidulous. Pappus a single series of slender rough white bristles. [Greek, referring to the white disk.]
Two or three species, natives of the central and southwestern States and Mexico, the following typical.
Inula (?) ericoides Torr. Ann. Lyc. N. Y. 2: 212. 1828.
Aster ericaefolius Rothrock, Bot. Gaz. 2: 70. 1877.
Leucelene ericoides Greene, Pittonia 3: 148. 1896.
Stems tufted from deep woody roots, corymbosely much branched, 3'-12' high, hispid or scabrous, the branches erect or diffuse. Leaves hispid-ciliate, erect, or slightly spreading, obtusish or mucronulate, the lower and basal ones spatulate, 3"-6" long, tapering into short petioles, the upper sessile, linear or linear-spatulate; heads terminating the branches, 5"-8" broad; involucre broadly turbinate, its bracts lanceolate, appressed, scarious-margined, imbricated in 3 or 4 series; rays 12-15, white to rose, 2"-4" long.
In dry soil, western Nebraska to Kansas, Texas and New Mexico. May-Aug.