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..
Hymenopappus tenuifolius Pursh, Am. Sept. 742. 1814.
Biennial; stem lightly tomentose, or at length glabrate, 1°- 2° high, slender, leafy below, corym-bosely branched and nearly naked above. Lower and basal leaves petioled, 1-3-pinnately parted into linear or filiform lobes, woolly pubescent beneath, at least when young; upper leaves much smaller and less compound; heads numerous, corymbose, 4"-6" broad; bracts of the involucre obovate-oblong, usually densely tomentose; corolla white, its lobes slightly shorter than the throat; achenes densely villous-pubescent; pappus of several oblong to ovate, ribbed or nerved scales, which are about as long as the width of the top of the achene or shorter.
On dry prairies, South Dakota to Nebraska, Kansas and Texas. June-Sept.
Biennial; stem densely white-woolly, at least when young, 1°-2 1/2° high, leafy, branched above. Leaves 1-3-pinnately parted or divided into linear segments; heads numerous, usually larger than those of the preceding species; involucral bracts obovate to ovate with greenish white margins; corolla yellow or yellowish, the lobes about equalling the throat, achenes short-villous; pappus scales spatulate, shorter than the slender corolla-tube.
In sandy soil, Kansas to Texas, Arizona and northern Mexico.
Hymenopappus filifolius Hook. Fl. Bor. Am. 1:317. 1833.
Perennial from a deep woody root; stems usually tufted, woolly when young, sometimes glabrate when old, densely leafy toward the base, usually naked or nearly so and sparingly branched above, 6'-18' high. Leaves tomentose when young, the lower and basal ones petioled, 1-3-pinnately parted or pinnatifid into narrowly linear, somewhat rigid lobes; heads commonly few, 6"-12" broad; bracts of the involucre obovate-oblong, usually densely woolly, their tips whitish; corolla yellow or yellowish, its lobes much shorter than the throat; achenes densely villous; pappus scales costate, short.
On prairies and in dry rocky soil, Saskatchewan to North Dakota, Montana, Nebraska and Colorado. June-Sept.
8o. OTHAKE Raf. New Fl. N. A. 4: 73. 1836.
Erect rough, glandular or cinereous, branching annual herbs, with alternate, mostly entire leaves, or the lower opposite, and corymbose or panicled heads of tubular or both tubular and radiate pink or purple flowers. Involucre campanulate or obconic, its bracts in 1 or 2 series, narrow, herbaceous, nearly equal, or with a few exterior shorter ones, appressed, usually colored. Receptacles small, flat, naked. Ray-flowers, when present, pistillate, fertile, the rays 3-cleft. Disk-flowers perfect, fertile, their corollas with slender tubes and deeply 5-parted campanulate limbs. Anthers entire or emarginate at the base. Style-branches filiform, acutish, glandular-pubescent throughout. Achenes linear or narrowly obpyramidal, quadrangular. Pappus of 6-12 lanceolate strongly costate scales, that of the outer achenes often much shorter. [Greek, warty apex, referring to the callous-tipped leaves of some species.]
About 6 species, natives of the south-central United States and Mexico; in our first edition referred to the genus Polypteris Nutt. Type species: Othake tenuifolium Raf.
Rays purple, deeply 3-lobed; leaves lanceolate.
1. O. sphacelatum.
Rays none; leaves linear.
2. O. callosum.