Packera tampicana |
Packera sanguisorboides |
|
---|---|---|
Great Plains ragwort |
burnet ragwort |
|
Habit | Annuals, 20–50+ cm; taprooted (caudices ascending to erect). | Perennials or biennials, 30–50+ cm; ± fibrous-rooted (bases creeping, ascending to erect). |
Stems | 1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose. |
1 or 2–3, clustered, glabrous or leaf axils 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 broadly oblanceolate (pinnately lobed, lateral lobes 2–3+ pairs, their bases petioluliform, terminal lobes larger than laterals, ovate to reniform, midribs not winged), 60–120+ × 20–60 mm, bases contracted, ultimate margins crenate to crenate-dentate. |
Cauline leaves | gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed). |
gradually reduced (petiolate or sessile; lyrate to sublyrate, midribs winged, terminal lobes weakly distinct, shallowly dentate). |
Peduncles | bracteate, glabrous. |
inconspicuously bracteate, glabrous or tomentose proximally. |
Ray florets | 8 or 13; corolla laminae 3–7 mm. |
8; corolla laminae 6–12 mm. |
Disc florets | 30–45(–100+); corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm. |
35–50+; corolla tubes 2.5–3.5 mm, limbs 2–3 mm. |
Phyllaries | 13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous. |
13, bright green (tips light green to yellow), 4–7 mm, glabrous. |
Calyculi | inconspicuous or 0. |
inconspicuous. |
Heads | 4–25+ in corymbiform arrays. |
3–8+ in subumbelliform or compound, cymiform arrays (of 2–4+ cymiform clusters of 2–5+ heads each). |
Cypselae | 1–1.5 mm, hirtellous on ribs; pappi 3–5 mm. |
1.5–2 mm, glabrous; pappi 4.5–5.5 mm. |
2n | = 46. |
= 46. |
Packera tampicana |
Packera sanguisorboides |
|
Phenology | Flowering Feb–Jun. | Flowering late Jul–mid Sep. |
Habitat | Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas | Damp, open meadows, spruce-aspen forests |
Elevation | 0–1000 m (0–3300 ft) | 2700–3700 m (8900–12100 ft) |
Distribution |
AR; KS; LA; OK; TX; Mexico
|
NM
|
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 sanguisorboides is known from the San Juan and Sangre de Cristo mountains of northern New Mexico, the Magdalena Mountains of western New Mexico, and the Sacramento Mountains of southern Lincoln and Otero counties. It may have affinities with P. coahuilensis Greenman. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 600. | FNA vol. 20, p. 598. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio tampicanus, Senecio greggii, Senecio imparipinnatus | Senecio sanguisorboides |
Name authority | (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) | (Rydberg) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) |
Web links |