Packera quercetorum |
Packera clevelandii |
|
---|---|---|
Oak Creek ragwort |
Cleveland's ragwort |
|
Habit | Perennials, 60–100+ cm; taprooted (caudices subligneous, ascending to erect). | Perennials, 30–80+ cm; taprooted (caudices suberect to erect, stout). |
Stems | 1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils. |
usually 1 (sometimes more, clustered), glaucous. |
Basal leaves | (and proximal cauline) petiolate; blades obovate or lyrate (pinnately lobed, lateral lobes 2–6+ pairs, their bases petioluliform, terminal lobes larger than laterals, midribs narrowly winged), 60–160+ × 20–40+ mm, bases wide, ultimate margins sharply dentate, crenate-dentate, or irregularly incised. |
(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; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised). |
gradually reduced (sessile and weakly clasping; lanceolate, entire). |
Peduncles | ebracteate, glabrous. |
conspicuously bracteate, glaucous. |
Ray florets | (8–)13; corolla laminae 6–10+ mm. |
8–10(–13); corolla laminae 5–7 mm. |
Disc florets | 60–70+; corolla tubes 2–3 mm, limbs 3.5–4.5 mm. |
25–40+; corolla tubes 2–3 mm, limbs 3–4 mm. |
Phyllaries | (13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy). |
(13) 21, green (tips often purple), glabrous. |
Calyculi | inconspicuous. |
conspicuous. |
Heads | 15–40+ in open, cymiform arrays. |
12–20+ in open, corymbiform arrays. |
Cypselae | 1.5–2 mm, glabrous or ± scabrellous; pappi 5.5–6.5 mm. |
1–1.5 mm, glabrous; pappi 5–6 mm. |
2n | = 92. |
= 46. |
Packera quercetorum |
Packera clevelandii |
|
Phenology | Flowering mid Apr–early Jun. | Flowering mid Jun–mid Jul. |
Habitat | Rocky soils, open areas, scrub-oak and pinyon-pine forests, chaparral | Rocky, serpentine soils, open, dry, shrubby areas, dry streambeds |
Elevation | 800–2200 m (2600–7200 ft) | 300–700 m (1000–2300 ft) |
Distribution |
AZ; NM
|
CA
|
Discussion | Packera quercetorum is found only infrequently and in relatively small populations in central and southern Arizona and west-central New Mexico. The plants are robust and have probable affinities to P. multilobata. The plants have a bluish tinge when freshly collected and are distinctive in the field. (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. 598. | FNA vol. 20, p. 582. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio quercetorum, Senecio macropus | Senecio clevelandii, Senecio clevelandii var. heterophyllus |
Name authority | (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
Web links |