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..
An annual herb, with scapose stems, basal, entire, sinuate-dentate or pinnatifid leaves, and a small or middle-sized head of yellow flowers, solitary at the end of the scape. Involucre campanulate, its herbaceous bracts 9-18, reflexed in fruit, in 2 series, with no exterior shorter ones. Receptacle flat, naked. Rays truncate and 5-toothed at the apex. Anthers sagittate at the base. Style-branches slender, obtusish. Achenes turbinate, 15-20-ribbed, truncate. Pappus in 2 series, the outer of 5 thin broad rounded scales, the inner of 10 or more slender naked bristles. [In honor of David Krig, who collected plants in Maryland early in the eighteenth century.]
A monotypic genus of North America. This and the two following genera were included in Adopogon Neck., in our first edition, but that genus is not typified, and the name probably belongs to an Old World plant.
Hyoseris virginica L. Sp. Pl. 809. 1753.
Hyoseris caroliniana Walt. Fl. Car. 194. 1788.
Krigia virginica Willd. Sp. Pl. 3: 1618. 1804.
Krigia caroliniana Nutt. Gen. 2: 126. 1818.
Annual, acaulescent; scapes usually several from the same root, very slender, glabrous or hispidulous, monocephalous, 1'-15' high, simple, or sometimes branched at or near the base. Leaves commonly all basal, tufted, spatulate, lanceolate or linear, pinnatifid, sinuate, lobed, dentate or rarely entire, 1'-6' long, narrowed at the base into usually margined petioles; head 3'-7" broad; involucre of 9-18 linear-lanceolate bracts, reflexed after the fall of the narrowly turbinate somewhat 5-angled achenes; pappus of 5 round short scales and 10 or more long capillary bristles.
In dry, sandy soil, Maine to Ontario and Minnesota, Florida and Texas; also in Washington. April-Aug.