Packera tampicana |
Packera ionophylla |
|
---|---|---|
Great Plains ragwort |
Tehachapi ragwort |
|
Habit | Annuals, 20–50+ cm; taprooted (caudices ascending to erect). | Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). |
Stems | 1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose. |
usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-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. |
(and proximal cauline, relatively turgid) petiolate; blades broadly ovate or lyrate (± pinnately lobed, lateral lobes 1–3 pairs, smaller than terminals), 10–30+ × 10–20+ mm, bases tapering to cuneate, ultimate margins subentire or crenate to coarsely dentate (abaxial faces tomentose). |
Cauline leaves | gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed). |
gradually reduced (sessile; bractlike, entire). |
Peduncles | bracteate, glabrous. |
bracteate, irregularly tomentose. |
Ray florets | 8 or 13; corolla laminae 3–7 mm. |
8–13; corolla laminae 8–10 mm. |
Disc florets | 30–45(–100+); corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm. |
60–75+; corolla tubes 2.5–4 mm, limbs 3.5–5 mm. |
Phyllaries | 13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous. |
(8–)13 or 21, green, 7–10+ mm, densely tomentose proximally, glabrescent distally (tips hair-tufted). |
Calyculi | inconspicuous or 0. |
inconspicuous. |
Heads | 4–25+ in corymbiform arrays. |
3–6 in cymiform arrays. |
Cypselae | 1–1.5 mm, hirtellous on ribs; pappi 3–5 mm. |
2–2.5 mm, glabrous; pappi 5–7 mm. |
2n | = 46. |
= 46. |
Packera tampicana |
Packera ionophylla |
|
Phenology | Flowering Feb–Jun. | Flowering early Jun–late Aug. |
Habitat | Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas | Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands |
Elevation | 0–1000 m (0–3300 ft) | 1400–3000 m (4600–9800 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 ionophylla is known only from the San Bernardino, San Gabriel, and Tehachapi mountains and a population on Alamo Mountain in eastern Ventura County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 600. | FNA vol. 20, p. 590. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio tampicanus, Senecio greggii, Senecio imparipinnatus | Senecio ionophyllus, Senecio ionophyllus var. intrepidus |
Name authority | (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
Web links |