Packera tampicana |
Packera clevelandii |
|
---|---|---|
Great Plains ragwort |
Cleveland's ragwort |
|
Habit | Annuals, 20–50+ cm; taprooted (caudices ascending to erect). | Perennials, 30–80+ cm; taprooted (caudices suberect to erect, stout). |
Stems | 1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose. |
usually 1 (sometimes more, clustered), glaucous. |
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. |
(and proximal cauline, relatively thick and turgid) petiolate; blades lanceolate to narrowly oblanceolate, 30–100+ × 10–20+ mm, bases tapering, margins entire or subentire. |
Cauline leaves | gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed). |
gradually reduced (sessile and weakly clasping; lanceolate, entire). |
Peduncles | bracteate, glabrous. |
conspicuously bracteate, glaucous. |
Ray florets | 8 or 13; corolla laminae 3–7 mm. |
8–10(–13); 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. |
25–40+; corolla tubes 2–3 mm, limbs 3–4 mm. |
Phyllaries | 13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous. |
(13) 21, green (tips often purple), glabrous. |
Calyculi | inconspicuous or 0. |
conspicuous. |
Heads | 4–25+ in corymbiform arrays. |
12–20+ in open, corymbiform arrays. |
Cypselae | 1–1.5 mm, hirtellous on ribs; pappi 3–5 mm. |
1–1.5 mm, glabrous; pappi 5–6 mm. |
2n | = 46. |
= 46. |
Packera tampicana |
Packera clevelandii |
|
Phenology | Flowering Feb–Jun. | Flowering mid Jun–mid Jul. |
Habitat | Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas | Rocky, serpentine soils, open, dry, shrubby areas, dry streambeds |
Elevation | 0–1000 m (0–3300 ft) | 300–700 m (1000–2300 ft) |
Distribution |
AR; KS; LA; OK; TX; Mexico
|
CA
|
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 clevelandii is known only from the North Coast Ranges and foothills of the Sierra Nevada on serpentine soils in chaparral communities. It is the only Packera with subsucculent, glaucous herbage. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 600. | FNA vol. 20, p. 582. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio tampicanus, Senecio greggii, Senecio imparipinnatus | Senecio clevelandii, Senecio clevelandii var. heterophyllus |
Name authority | (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
Web links |