Rugelia

Shuttleworth ex Chapman

Fl. S.E. U.S., 246. 1860

Common names: Rugelia Rugel’s ragwort winter well
Etymology: For Ferdinand Ignatius Xavier Rugel, 1806–1878, original collector of the species
Treatment appears in FNA Volume 20. Treatment on page 625. Mentioned on page 543.
Perennials, 20–40(–50) cm (rhizomes creeping, roots fibrous, branched). Stems 1(–3), erect (scapiform, sparsely arachnoid, unevenly glabrescent proximally, hirsute and/or stipitate-glandular distally). Leaves mostly basal (cauline smaller); alternate; petiolate (bases ± sheathing); blades palmately or palmati-pinnately nerved, ovate to nearly cordate, margins dentate to denticulate, abaxial faces tomentose to arachnose-villous, glabrescent or glabrate, adaxial puberulent or glabrate. Heads discoid (often ± nodding), in cymiform (terminal or axillary) arrays. Calyculi 0 or of 1–3 bractlets. Involucres cylindric or turbinate, 10–12+ mm diam. Phyllaries persistent, 10–15 in 1–2 series, erect (spreading in age), distinct, lance-linear to linear, equal, margins ± scarious (abaxial faces ± hirsute). Receptacles flat or convex, smooth or ± foveolate, epaleate. Ray florets 0. Disc florets 30–40(–80+), bisexual, fertile; corollas usually ochroleucous or whitish, sometimes greenish, tubes shorter to longer than narrowly cylindric throats, lobes 5, erect or spreading, lanceolate to lance-linear; style branches: stigmatic areas continuous or in 2 lines, apices truncate to rounded-truncate. Cypselae cylindro-fusiform, 20-nerved, glabrous; pappi persistent, of 80–120, whitish to stramineous, barbellulate to smooth bristles (equaling or surpassing involucres). x = 7.

Distribution

se United States.

Discussion

Species 1.

References

None.

Lower Taxa