Stokesia
Stokesia
Overview
General Description
Stokesia is a monotypic genus local to the southeastern United States. For more information on this genus, please see the page for its only species, Stokesia laevis.
Description
Diagnostic Description
"Stokesia L’Héritier, Sert. Angl. 27. 1789.
[For Jonathan Stokes, 1755–1831, English physician and botanist]
Perennials, 2–5+ dm; perhaps rhizomatous. Leaves basal and cauline; proximal petiolate, blades ovate to lanceolate or lance-linear; distal ± sessile, blades ovate or elliptic to lanceolate or lance-linear, bases ± clasping, margins entire or spinose-toothed; all with apices rounded to acute, faces glabrous or glabrate, resin-gland-dotted. Heads pseudo-radiant (see here at corollas), ± pedunculate, not individually bracteate; borne singly or in loose, ± corymbiform arrays 6–12 cm diam. Involucres ± hemispheric, 25–45 mm diam. Phyllaries 25–35+ in 5–7 series, the outer with appressed, ± chartaceous bases, distally ± foliaceous, margins pectinately spiny-toothed (at least at base), inner ± chartaceous throughout, mostly entire, faces ± tomentulose and resin-gland-dotted. Florets 12–35(–70+); corollas usually blue to purplish blue (rarely white or lilac), tubes longer than funnelform throats, lobes 5, lance-linear (in peripheral florets adaxial sinus much deeper than others and corollas zygomorphic, ± raylike or ligulelike, in central florets corollas ± actinomorphic). Cypselae ± columnar, 3–4-angled, glabrous; pappi caducous, of 4–5 scales. x = 7.
Species 1: se United States."


