Packera ganderi

(T. M. Barkley & R. M. Beauchamp) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Common names: Gander’s ragwort
Basionym: Senecio ganderi T. M. Barkley & R. M. Beauchamp Brittonia 26: 106, fig. 1. 1974
Treatment appears in FNA Volume 20. Treatment on page 588. Mentioned on page 572.
Revision as of 18:41, 24 September 2019 by FNA>Volume Importer

Perennials, 30–80+ cm; fibrous-rooted (bases weakly spreading). Stems 1, glabrous or bases hairy. Basal leaves (and proximal cauline, relatively turgid or leathery) petiolate; blades reniform to suborbiculate, 40–70+ × 40–80+ mm, bases truncate to cordate, margins dentate or shallowly lobed. Cauline leaves abruptly reduced (petiolate or sessile, oblanceolate, pinnatifid; distal sessile, bractlike). Heads 3–6+ in compact, cymiform arrays. Peduncles ebracteate (or bractlets 1–2), glabrous. Calyculi 0 or inconspicuous. Phyllaries (13–)21, dark green with yellow margins, 8–11+ mm, glabrous. Ray florets 13 or 21; corolla laminae 10–12+ mm. Disc florets 40–60+; corolla tubes 3–4 mm, limbs 2.5–3.5 mm. Cypselae 5–6 mm, glabrous; pappi 5–7 mm.


Phenology: Flowering mid Apr–late May.
Habitat: Recently burned chaparral on mountain slopes, gabbroic soils
Elevation: 700–1100 m

Discussion

Of conservation concern.

Packera ganderi is known only from the mountain ranges of San Diego County, where it has been collected from three sites.

Selected References

None.

Lower Taxa

None.