Packera tampicana |
Packera subnuda |
|||||
---|---|---|---|---|---|---|
Great Plains ragwort |
alpine meadow butterweed, alpine meadow groundsel, Buek's groundsel, cleft-leaf groundsel, few-leaf groundsel, pale groundsel |
|||||
Habit | Annuals, 20–50+ cm; taprooted (caudices ascending to erect). | Perennials, 10–30+ cm; fibrous-rooted and/or rhizomatous (bases relatively slender, horizontal to suberect). | ||||
Stems | 1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose. |
usually 1, rarely 2–3, loosely clustered, glabrous. |
||||
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 ovate, obovate, or elliptic, 20–40+ × 10–30+ mm, bases tapering to contracted, margins subentire to crenate-dentate. |
||||
Cauline leaves | gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed). |
abruptly reduced (sessile, often weakly clasping, dentate to subentire; distals sessile, lanceolate, weakly clasping, entire or dentate). |
||||
Peduncles | bracteate, glabrous. |
sparsely bracteate or ebracteate, glabrous. |
||||
Ray florets | 8 or 13; corolla laminae 3–7 mm. |
13; corolla laminae 7–12+ mm. |
||||
Disc florets | 30–45(–100+); corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm. |
40–55+; corolla tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. |
||||
Phyllaries | 13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous. |
(13–)21, green (tips sometimes cyanic), 5–8+ mm, glabrous. |
||||
Calyculi | inconspicuous or 0. |
(bractlets frequently cyanic). |
||||
Heads | 4–25+ in corymbiform arrays. |
1(–5; sometimes subtended by 2 relatively large bractlets). |
||||
Cypselae | 1–1.5 mm, hirtellous on ribs; pappi 3–5 mm. |
1.5–2.5 mm, glabrous; pappi 4–6 mm. |
||||
2n | = 46. |
= 46, 90. |
||||
Packera tampicana |
Packera subnuda |
|||||
Phenology | Flowering Feb–Jun. | |||||
Habitat | Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas | |||||
Elevation | 0–1000 m (0–3300 ft) | |||||
Distribution |
AR; KS; LA; OK; TX; Mexico
|
AK; CA; ID; MT; NV; OR; WA; WY; AB; BC
|
||||
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.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 20, p. 600. | FNA vol. 20, p. 599. | ||||
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Senecio tampicanus, Senecio greggii, Senecio imparipinnatus | Senecio subnudus, P. buekii, Senecio aureus var. subnudus, Senecio cymbalarioides | ||||
Name authority | (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) | (de Candolle) Trock & T. M. Barkley: Sida 18: 635. (1999) | ||||
Web links |
|