Packera neomexicana |
Packera spellenbergii |
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New Mexico groundsel |
Carrizo Creek ragwort |
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Habit | Perennials, biennials, or annuals, 20–50+ cm; fibrous-rooted, taprooted, or ± rhizomatous (bases branched, horizontal or ascending to erect). | Perennials, 3–6+ cm; fibrous-rooted and/or rhizomatous (bases coarse, weakly creeping or suberect). | ||||||||
Stems | 1 or 2–5+, clustered, lanate- or arachno-tomentose or glabrescent. |
usually 1, sometimes 2, densely tomentose (at least proximally), becoming glabrate distally. |
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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). |
(relatively leathery) sessile; blades linear, 10–15+ × 1–2 mm, margins entire (revolute). |
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Cauline leaves | gradually or abruptly reduced (proximal petiolate, similar to basals; mids and distals sessile, lanceolate, entire). |
abruptly reduced (linear, bractlike). |
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Peduncles | conspicuously bracteate, usually hairy. |
bracteate, tomentose or glabrate. |
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Ray florets | (5–)8 or 13; corolla laminae 4–10 mm. |
0 or 5–8; corolla laminae 4–7 mm. |
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Disc florets | 40–60+; corolla tubes 1.5–2.5 mm, limbs 3.5–4.5 mm. |
30–40+; corolla tubes 2.5–3.5 mm, limbs 3.5–4 mm. |
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Phyllaries | 13 or 21, green or yellowish, 4–7+ mm, tomentose to glabrescent. |
13, purple to deep reddish purple, 6–9+ mm, hairy or glabrescent. |
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Calyculi | conspicuous. |
conspicuous. |
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Heads | 3–20+ in open or compact, corymbiform to subumbelliform arrays (subtended by smaller arrays arising from leaf axils). |
1(–2). |
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Cypselae | 1.5–2.5 mm, usually hirtellous on ribs, sometimes glabrous; pappi 5–6+ mm. |
3–3.5 mm, hirtellous; pappi 5–6 mm. |
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2n | = 44, 46, 92. |
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Packera neomexicana |
Packera spellenbergii |
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Phenology | Flowering mid Apr–mid May. | |||||||||
Habitat | Calcareous soils, sparsely vegetated areas of short-grass prairies | |||||||||
Elevation | 1600–2200 m (5200–7200 ft) | |||||||||
Distribution |
AZ; CO; NM; UT; w Mexico
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NM; UT |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Packera spellenbergii is known only from Harding and Union counties, New Mexico, and Kane County, Utah. The plants are succulent, have deeply cyanic herbage, and conspicuously revolute leaves. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 593. | FNA vol. 20, p. 599. | ||||||||
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Senecio neomexicanus | Senecio spellenbergii, Senecio cliffordii | ||||||||
Name authority | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (T. M. Barkley) C. Jeffrey: Kew Bull. 47: 101. (1992) | ||||||||
Web links |