Packera multilobata |
Packera obovata |
|
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lobeleaf groundsel |
roundleaf ragwort, running groundsel |
|
Habit | Biennials or perennials, 20–40+ cm; taprooted (caudices ascending to erect, weakly branched). | Perennials, 20–50+ cm; stoloniferous and rhizomatous (rhizomes horizontal to suberect). |
Stems | 1 or 2–5, loosely clustered, usually glabrous or glabrescent, sometimes sparsely tomentose throughout, axils (basal leaves) tomentose. |
1 or multiple, loosely clustered, usually glabrous, sometimes tomentose proximally and in leaf axils. |
Basal leaves | (and proximal cauline) petiolate; blades obovate, oblanceolate, spatulate, or lyrate to sublyrate (± pinnately lobed, lateral lobes 3–6 pairs, smaller than terminal lobes), 40–80+ × 10–30+ mm, bases tapering, ultimate margins incised to dentate. |
(and proximal cauline) petiolate; blades orbiculate, ovate, or obovate, 40–100+ × 20–80+ mm, bases tapering, rounded, or abruptly contracted, margins crenate, dentate, or serrate. |
Cauline leaves | gradually reduced (sessile). |
gradually reduced (sessile, clasping; pinnatisect or sublyrate). |
Peduncles | conspicuously bracteate, glabrous or tomentose. |
bracteate, glabrous or proximally tomentose. |
Ray florets | 8–13; corolla laminae 7–10 mm. |
8–13(–21); corolla laminae 7–10 mm. |
Disc florets | 40–50+; corolla tubes 4–5 mm, limbs 3–4 mm. |
40–50+; corolla tubes 2–3 mm, limbs 2–3 mm. |
Phyllaries | 13–21, green (tips often yellow), 4–9+ mm, glabrous or sparsely tomentose (at least proximally). |
13 or 21, green (tips sometimes reddish), 3–6 mm, glabrous or floccose-tomentose proximally. |
Calyculi | conspicuous. |
conspicuous. |
Heads | 10–30+ in open, corymbiform or subumbelliform arrays. |
6–15+ in open or congested, corymbiform arrays. |
Cypselae | 2–3 mm, glabrous or hirtellous on ribs; pappi 5–6 mm. |
1–1.5 mm, glabrous or hirsute on ribs; pappi 3–6 mm. |
2n | = 46, 92. |
= 44, 88, 90. |
Packera multilobata |
Packera obovata |
|
Phenology | Flowering early May–mid Jul. | Flowering late Feb–Apr (south), early Apr–early Jun (north). |
Habitat | Dry rocky or sandy soils in sagebrush, woodlands, and subalpine areas | Meadows in deciduous woodlands, wet ditches, stream banks, rocky hillsides |
Elevation | 1200–2900 m (3900–9500 ft) | 0–2500 m (0–8200 ft) |
Distribution |
AZ; CA; CO; ID; NM; NV; UT; WY
|
AL; AR; CT; FL; GA; IL; IN; KS; KY; LA; MA; MD; MI; MO; MS; NC; NH; NJ; NM; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WV; ON; QC; Mexico (Coahuila)
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Discussion | Packera multilobata is abundant and widespread west of the Continental Divide. Both morphology and habitat vary. In colder parts of its range, plants are shorter, caudices are better developed with clustered stems, and leaf lobes are larger. In desert-like habitats, basal leaves are narrower and more finely lobed, the tomentum is often persistent, and stems are usually single. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera obovata forms relatively large, stoloniferous colonies in wet sites. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 592. | FNA vol. 20, p. 594. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio multilobatus, Senecio leucoreus, Senecio lynceus, Senecio nelsonii var. uintahensis, Senecio prolixus, Senecio stygius, Senecio thornberi, Senecio uintahensis | Senecio obovatus, Senecio aureus var. obovatus, Senecio elliottii, Senecio elongatus, Senecio rotundus |
Name authority | (Torrey & A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (Muhlenberg ex Willdenow) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
Web links |