Packera tampicana |
Packera fendleri |
|
---|---|---|
Great Plains ragwort |
Fendler's ragwort, notchleaf groundsel |
|
Habit | Annuals, 20–50+ cm; taprooted (caudices ascending to erect). | Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to suberect, branched). |
Stems | 1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose. |
1 or multiple (crowded to subcespitose), floccose-tomentose or glabrescent. |
Basal leaves | (and proximal cauline) petiolate; blades oblanceolate to spatulate (usually pinnately lobed, lateral lobes 1–6+ pairs, their bases petioluliform, terminal lobes usually larger than laterals, often reniform to ± orbiculate, midribs sometimes ± winged and/or toothed between the primary lobes), 40–120+ × 10–30+ mm, bases ± cuneate, ultimate margins subentire or irregularly crenate, dentate, or lobed. |
petiolate; blades lanceolate to oblanceolate, 30–60+ × 10–30+ mm, bases tapering, margins shallowly, evenly pinnatifid to pinnatisect or wavy (adaxial faces floccose-tomentose or subglabrescent). |
Cauline leaves | gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed). |
gradually reduced (sessile; lanceolate to oblanceolate, pinnatisect to wavy). |
Peduncles | bracteate, glabrous. |
bracteate, densely to irregularly floccose. |
Ray florets | 8 or 13; corolla laminae 3–7 mm. |
6–8+; corolla laminae 5–7 mm. |
Disc florets | 30–45(–100+); corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm. |
30–40+; corolla tubes 2.5–3 mm, limbs, 2.5–3.5 mm. |
Phyllaries | 13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous. |
13, green, 5–7 mm, floccose proximally to glabrescent distally. |
Calyculi | inconspicuous or 0. |
0 or inconspicuous (bractlets red-tinged). |
Heads | 4–25+ in corymbiform arrays. |
6–25+ in open or compact, corymbiform arrays. |
Cypselae | 1–1.5 mm, hirtellous on ribs; pappi 3–5 mm. |
2.5–3 mm, glabrous; pappi 4–5 mm. |
2n | = 46. |
= 46. |
Packera tampicana |
Packera fendleri |
|
Phenology | Flowering Feb–Jun. | Flowering late May–early Oct. |
Habitat | Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas | Steep slopes, loose, dry rocky or gravelly soils, along streams, open forests, disturbed sites |
Elevation | 0–1000 m (0–3300 ft) | 1600–3200 m (5200–10500 ft) |
Distribution |
AR; KS; LA; OK; TX; Mexico
|
CO; NM; WY
|
Discussion | Packera tampicana is fairly widespread along the Gulf Coastal Plain and north and in Mexico. Morphologically, P. tampicana most closely resembles P. glabella; the former grows in very wet, sandy or clay soils and open sunlight, the latter grows in drier habitats, usually in partial shade. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera fendleri is abundant, almost weedy in the southern Rocky Mountains. It thrives in a wide range of elevations and in a wide variety of habitats; flowering times vary. It frequently grows in close association with other species of Packera and may hybridize with them. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 600. | FNA vol. 20, p. 587. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio tampicanus, Senecio greggii, Senecio imparipinnatus | Senecio fendleri, Senecio canovirens, Senecio fendleri var. molestus, Senecio nelsonii, Senecio rosulatus, Senecio salicinus |
Name authority | (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
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