Packera werneriifolia |
Packera quercetorum |
|
---|---|---|
alpine rock butterweed, hoary groundsel |
Oak Creek ragwort |
|
Habit | Perennials, 7–15+ cm; ± rhizomatous (rhizomes branched, sometimes densely crowded). | Perennials, 60–100+ cm; taprooted (caudices subligneous, ascending to erect). |
Stems | 1 or 3–5, clustered (often scapiform), usually floccose, lanate-tomentose, or canescent, sometimes glabrate. |
1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils. |
Basal leaves | (either of two forms): usually (1) sessile, sometimes petiolate; blades narrowly lanceolate to elliptic, 15–40+ × 5–25 mm, bases tapering, margins entire or dentate toward apices (often revolute), sometimes (2) petiolate; blades ovate to orbiculate, 10–20 × 5–15 mm, bases tapering to abruptly contracted, margins entire or wavy, sometimes dentate toward apices. |
(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. |
Cauline leaves | abruptly reduced (bractlike). |
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised). |
Peduncles | inconspicuously bracteate, glabrous or densely hairy. |
ebracteate, glabrous. |
Ray florets | 0, 8, or 13; corolla laminae 5–10 mm. |
(8–)13; corolla laminae 6–10+ mm. |
Disc florets | 30–50+; corolla tubes 2.5–3.5 mm, limbs 3–4 mm. |
60–70+; corolla tubes 2–3 mm, limbs 3.5–4.5 mm. |
Phyllaries | 13 or 21, green (tips sometimes cyanic), 4–10 mm, glabrous or hairy. |
(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy). |
Calyculi | conspicuous (bractlets often cyanic). |
inconspicuous. |
Heads | 1–5(–8) in cymiform to subumbelliform arrays. |
15–40+ in open, cymiform arrays. |
Cypselae | 1.5–2 mm, glabrous; pappi 5–6 mm. |
1.5–2 mm, glabrous or ± scabrellous; pappi 5.5–6.5 mm. |
2n | = 44, 46. |
= 92. |
Packera werneriifolia |
Packera quercetorum |
|
Phenology | Flowering mid Jun–mid Aug. | Flowering mid Apr–early Jun. |
Habitat | Rocky talus slopes, sandy soils in forest openings near or above timberline | Rocky soils, open areas, scrub-oak and pinyon-pine forests, chaparral |
Elevation | 2400–3700 m (7900–12100 ft) | 800–2200 m (2600–7200 ft) |
Distribution |
AZ; CA; CO; ID; NM; NV; UT; WY
|
AZ; NM
|
Discussion | Packera werneriifolia is morphologically variable; it occurs throughout the central Rockies and, sporadically, as far west as the Sierra Nevada. Leaf morphology varies from ovate, elliptic, or narrowly elliptic in the Rockies to narrow with revolute margins in California and Arizona. All specimens are characteristically scapiform. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 20, p. 602. | FNA vol. 20, p. 598. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio aureus var. werneriifolius, Senecio alpicola, Senecio molinarius, Senecio muirii, Senecio perennans, Senecio petraeus, Senecio petrocallis, Senecio petrophilus, Senecio saxosus, Senecio scaposus, Senecio werneriifolius | Senecio quercetorum, Senecio macropus |
Name authority | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) |
Web links |