Packera neomexicana

(A. Gray) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Basionym: Senecio neomexicanus A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 392. 1884 (as neo-mexicanus)
Treatment appears in FNA Volume 20. Treatment on page 593. Mentioned on page 576, 578.

Perennials, biennials, or annuals, 20–50+ cm; fibrous-rooted, taprooted, or ± rhizomatous (bases branched, horizontal or ascending to erect). Stems 1 or 2–5+, clustered, lanate- or arachno-tomentose or glabrescent. Basal leaves (often abaxially cyanic) petiolate (petioles hairy to glabrate); blades ovate to lanceolate or narrowly lanceolate, 20–60+ × 10–30+ mm, bases abruptly contracted to tapering, margins subentire or denticulate to subserrate (abaxial faces usually tomentose, adaxials frequently glabrate). Cauline leaves gradually or abruptly reduced (proximal petiolate, similar to basals; mids and distals sessile, lanceolate, entire). Heads 3–20+ in open or compact, corymbiform to subumbelliform arrays (subtended by smaller arrays arising from leaf axils). Peduncles conspicuously bracteate, usually hairy. Calyculi conspicuous. Phyllaries 13 or 21, green or yellowish, 4–7+ mm, tomentose to glabrescent. Ray florets (5–)8 or 13; corolla laminae 4–10 mm. Disc florets 40–60+; corolla tubes 1.5–2.5 mm, limbs 3.5–4.5 mm. Cypselae 1.5–2.5 mm, usually hirtellous on ribs, sometimes glabrous; pappi 5–6+ mm. 2n = 44, 46, 92.



Ariz., Colo., N.Mex., Utah, w Mexico.


Varieties 3 (3 in the flora).

Selected References



1 Plants loosely tomentose or glabrate; basal leaves: blades narrowly lanceolate, margins subentire or irregularly dentate Packera neomexicana var. mutabilis
1 Plants usually densely lanate or woolly tomentose, seldom glabrate; basal leaves: blades ovate or broadly lanceolate, margins dentate to deeply dentate or dissected > 2
2 Plants taprooted; cauline leaves conspicuous Packera neomexicana var. neomexicana
2 Plants rhizomatous or fibrous-rooted; cauline leaves inconspicuous (bractlike) Packera neomexicana var. toumeyi