Difference between revisions of "Packera pseudaurea"
Phytologia 49: 48. 1981.
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Latest revision as of 18:29, 6 November 2020
Perennials, 20–70+ cm; fibrous-rooted (bases simple or branched, horizontal to erect). Stems usually 1, sometimes 2–4, clustered, glabrous or sparsely tomentose proximally. Basal leaves petiolate; blades usually broadly lanceolate to ovate, sometimes subhastate, 20–50+ × 20–40+ mm, bases truncate to subcordate or obtuse, margins crenate, denticulate, bluntly dentate, or sharply dentate (proximal cauline leaves petiolate; margins usually pinnately lobed to laciniate, sometimes subentire). Cauline leaves gradually reduced (becoming sessile, sometimes clasping). Heads 5–20+ in open or congested, subumbelliform arrays. Peduncles bracteate, glabrous. Calyculi inconspicuous. Phyllaries (13–)21(–30+), light green, 3–8 mm, glabrous. Ray florets 0, 8, or 13; corolla laminae 6–10+ mm. Disc florets 70–80+; corolla tubes 2.5–3.5 mm, limbs 2–3 mm. Cypselae 1–1.5 mm, glabrous; pappi 4.5–5.5 mm. 2n = 40, 44, 46, 80.
Distribution
Alta., B.C., Sask., Calif., Colo., Idaho, Iowa, Kans., Minn., Mo., Mont., N.Dak., N.Mex., Nebr., Nev., Oreg., S.Dak., Wash., Wyo.
Discussion
Varieties 3 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Basal leaves: margins sharply dentate; phyllaries 7–8 mm | Packera pseudaurea var. pseudaurea |
| 1 | Basal leaves: margins usually crenate, denticulate, or bluntly dentate, rarely sharply dentate; phyllaries 3–6 mm | > 2 |
| 2 | Basal leaves: petiole lengths equaling blades, blades broadly ovate, margins usually bluntly dentate or denticulate, rarely sharply dentate; heads 5–12 in congested, cymiform arrays; phyllaries 3–5 mm; s Rocky Mountains | Packera pseudaurea var. flavula |
| 2 | Basal leaves: petiole lengths 1.5–2 times blades, blades narrowly ovate, margins crenate; heads 6–12 in open or slightly congested, corymbiform or cymiform arrays; phyllaries 4–6 mm; Great Plains | Packera pseudaurea var. semicordata |