413. Hartwrightia A. Gray ex S. Watson, Proc. Amer. Acad. Arts. 23: 264. 1888.
[For Samuel Hart Wright, 1825–1905, collector of the specimens from which the genus was described]
Guy L. Nesom
Perennials, 60–120 cm (rhizomes thickened, fibrous-rooted). Stems erect, branched distally. Leaves basal and cauline; mostly alternate; petiolate or sessile; blades 1-nerved (or pinnately nerved), elliptic to linear [spatulate to oblanceolate], margins mostly entire, faces glabrous, gland-dotted. Heads discoid, in loose, corymbiform arrays. Involucres broadly obconic, 2–3 mm diam. Phyllaries persistent, 12–15 in 2–3 series, not notably nerved, oblong-elliptic to lanceolate, ± equal (herbaceous). Receptacles convex, usually partially paleate (paleae peripheral). Florets 7–10; corollas white or pinkish to bluish, throats campanulate (lengths ca. 1.5 times diams.), lobes 5, ± deltate; styles: bases not enlarged, glabrous, branches filiform to weakly clavate. Cypselae obpyramidal, 5-angled or -grooved, gland-dotted; pappi usually 0, rarely 1(–5+), fragile, flexuous, ± glandular setae. x = 10.
Species 1: se United States.
SELECTED REFERENCE
Holzinger, J. M. 1893. The systematic position of Hartwrightia floridana. Bull. Torrey Bot. Club 20: 287–288.
