Packera quercetorum |
Packera fendleri |
|
---|---|---|
Oak Creek ragwort |
Fendler's ragwort, notchleaf groundsel |
|
Habit | Perennials, 60–100+ cm; taprooted (caudices subligneous, ascending to erect). | Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to suberect, branched). |
Stems | 1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils. |
1 or multiple (crowded to subcespitose), floccose-tomentose or glabrescent. |
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. |
petiolate; blades lanceolate to oblanceolate, 30–60+ × 10–30+ mm, bases tapering, margins shallowly, evenly pinnatifid to pinnatisect or wavy (adaxial faces floccose-tomentose or subglabrescent). |
Cauline leaves | gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised). |
gradually reduced (sessile; lanceolate to oblanceolate, pinnatisect to wavy). |
Peduncles | ebracteate, glabrous. |
bracteate, densely to irregularly floccose. |
Ray florets | (8–)13; corolla laminae 6–10+ mm. |
6–8+; corolla laminae 5–7 mm. |
Disc florets | 60–70+; corolla tubes 2–3 mm, limbs 3.5–4.5 mm. |
30–40+; corolla tubes 2.5–3 mm, limbs, 2.5–3.5 mm. |
Phyllaries | (13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy). |
13, green, 5–7 mm, floccose proximally to glabrescent distally. |
Calyculi | inconspicuous. |
0 or inconspicuous (bractlets red-tinged). |
Heads | 15–40+ in open, cymiform arrays. |
6–25+ in open or compact, corymbiform arrays. |
Cypselae | 1.5–2 mm, glabrous or ± scabrellous; pappi 5.5–6.5 mm. |
2.5–3 mm, glabrous; pappi 4–5 mm. |
2n | = 92. |
= 46. |
Packera quercetorum |
Packera fendleri |
|
Phenology | Flowering mid Apr–early Jun. | Flowering late May–early Oct. |
Habitat | Rocky soils, open areas, scrub-oak and pinyon-pine forests, chaparral | Steep slopes, loose, dry rocky or gravelly soils, along streams, open forests, disturbed sites |
Elevation | 800–2200 m (2600–7200 ft) | 1600–3200 m (5200–10500 ft) |
Distribution |
AZ; NM
|
CO; NM; WY
|
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 fendleri is abundant, almost weedy in the southern Rocky Mountains. It thrives in a wide range of elevations and in a wide variety of habitats; flowering times vary. It frequently grows in close association with other species of Packera and may hybridize with them. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 598. | FNA vol. 20, p. 587. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio quercetorum, Senecio macropus | Senecio fendleri, Senecio canovirens, Senecio fendleri var. molestus, Senecio nelsonii, Senecio rosulatus, Senecio salicinus |
Name authority | (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
Web links |