Packera quercetorum |
Packera anonyma |
|
---|---|---|
Oak Creek ragwort |
Small's ragwort |
|
Habit | Perennials, 60–100+ cm; taprooted (caudices subligneous, ascending to erect). | Perennials, 30–70+ cm; fibrous-rooted (caudices erect to ascending). |
Stems | 1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils. |
1 or 2–5, loosely clustered, bases densely tomentose, leaf axils usually tomentose. |
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 narrowly elliptic to oblanceolate, 30–90+ × 10–20+ mm, bases tapering, margins serrate to crenate-serrate (apices rounded to acute, faces glabrous). |
Cauline leaves | gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised). |
gradually reduced (petiolate or sessile; elliptic to lanceolate, often pinnatifid). |
Peduncles | ebracteate, glabrous. |
bracteate, distally tomentose. |
Ray florets | (8–)13; corolla laminae 6–10+ mm. |
8 or 13; corolla laminae 5–7+ mm. |
Disc florets | 60–70+; corolla tubes 2–3 mm, limbs 3.5–4.5 mm. |
45–60+; corolla tubes 1.5–2 mm, limbs 1.5–2 mm. |
Phyllaries | (13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy). |
13 or 21, light green, 3–5 mm, glabrous. |
Calyculi | inconspicuous. |
inconspicuous. |
Heads | 15–40+ in open, cymiform arrays. |
20–70(–100+) in corymbiform arrays. |
Cypselae | 1.5–2 mm, glabrous or ± scabrellous; pappi 5.5–6.5 mm. |
0.75–1 mm, hirsute on ribs; pappi 2.5–3 mm. |
2n | = 92. |
= 44. |
Packera quercetorum |
Packera anonyma |
|
Phenology | Flowering mid Apr–early Jun. | Flowering early Jun–mid Jul (north), early Apr–late May (south). |
Habitat | Rocky soils, open areas, scrub-oak and pinyon-pine forests, chaparral | Open fields, meadows, roadsides, disturbed sites, in drying or sandy soils |
Elevation | 800–2200 m (2600–7200 ft) | 50–1800 m (200–5900 ft) |
Distribution |
AZ; NM
|
AL; AR; DC; FL; GA; KY; LA; MD; MS; NC; NY; OH; PA; SC; TN; VA; WV
|
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 anonyma is common, almost weedy throughout most of its range. It grows on serpentine in Maryland, Ohio, and Pennsylvania. In western parts of its range, putative hybrids between P. anonyma and P. plattensis and P. tomentosa have been reported. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 598. | FNA vol. 20, p. 578. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio quercetorum, Senecio macropus | Senecio anonymus, Senecio aureus var. angustifolius, Senecio earlei, Senecio smallii |
Name authority | (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) | (Alph. Wood) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) |
Web links |