Packera tampicana |
Packera greenei |
|
---|---|---|
Great Plains ragwort |
flame ragwort |
|
Habit | Annuals, 20–50+ cm; taprooted (caudices ascending to erect). | Perennials, 20–30+ cm; rhizomatous (rhizomes horizontal to erect, not branched), sometimes stoloniferous. |
Stems | 1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose. |
1, irregularly lanate or tomentose. |
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) petiolate; blades orbiculate, ovate, oblanceolate, or rhombic, 20–50+ × 20–40+ mm, bases tapering, sometimes obtuse, margins coarsely dentate to crenate-dentate. |
Cauline leaves | gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed). |
gradually to abruptly reduced (petioles broad-winged, clasping, blades obovate, bases tapering, margins irregularly dentate; distal sessile, linear to lanceolate, entire). |
Peduncles | bracteate, glabrous. |
bracteate, lanate or tomentose distally. |
Ray florets | 8 or 13; corolla laminae 3–7 mm. |
8–10(–13); corolla laminae (red-orange) 8–15+ mm. |
Disc florets | 30–45(–100+); corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm. |
35–65+; corolla tubes 4–5 mm, limbs 5–6 mm. |
Phyllaries | 13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous. |
21, green (tips sometimes deep red), 8–10+ mm, densely tomentose proximally, sparsely tomentose distally. |
Calyculi | inconspicuous or 0. |
conspicuous. |
Heads | 4–25+ in corymbiform arrays. |
1–3+. |
Cypselae | 1–1.5 mm, hirtellous on ribs; pappi 3–5 mm. |
1.5–2.5 mm, glabrous; pappi 8–11 mm. |
2n | = 46. |
= 40, 46, 92. |
Packera tampicana |
Packera greenei |
|
Phenology | Flowering Feb–Jun. | Flowering mid May–early Jul. |
Habitat | Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas | Dry, rocky, usually serpentine soils, open scrub-pine associations |
Elevation | 0–1000 m (0–3300 ft) | 100–1600 m (300–5200 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.) |
Of conservation concern. Packera greenei is known from Coast Ranges of northern California. It has relatively large heads and bright orange-red ray corollas; its leaves are usually cyanic abaxially. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 600. | FNA vol. 20, p. 588. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio tampicanus, Senecio greggii, Senecio imparipinnatus | Senecio greenei |
Name authority | (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
Web links |