Packera obovata |
Packera bolanderi |
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roundleaf ragwort, running groundsel |
Bolander's groundsel, Bolander's ragwort |
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Habit | Perennials, 20–50+ cm; stoloniferous and rhizomatous (rhizomes horizontal to suberect). | Perennials, 20–50+ cm; fibrous-rooted (caudices creeping). | ||||
Stems | 1 or multiple, loosely clustered, usually glabrous, sometimes tomentose proximally and in leaf axils. |
1 or 2–3, loosely clustered, glabrous. |
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Basal leaves | (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. |
(and proximal cauline) petiolate; blades ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised. |
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Cauline leaves | gradually reduced (sessile, clasping; pinnatisect or sublyrate). |
gradually reduced (petiolate or sessile and clasping; lanceolate, incised). |
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Peduncles | bracteate, glabrous or proximally tomentose. |
ebracteate or inconspicuously bracteate, glabrous. |
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Ray florets | 8–13(–21); corolla laminae 7–10 mm. |
8 or 13; corolla laminae 10–15+ mm. |
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Disc florets | 40–50+; corolla tubes 2–3 mm, limbs 2–3 mm. |
30–45+; corolla tubes 3–4 mm, limbs 3.5–4.5 mm. |
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Phyllaries | 13 or 21, green (tips sometimes reddish), 3–6 mm, glabrous or floccose-tomentose proximally. |
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally. |
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Calyculi | conspicuous. |
conspicuous. |
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Heads | 6–15+ in open or congested, corymbiform arrays. |
8–15+ in corymbiform or subumbelliform arrays. |
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Cypselae | 1–1.5 mm, glabrous or hirsute on ribs; pappi 3–6 mm. |
2.5–3.5 mm, glabrous; pappi 5–7 mm. |
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2n | = 44, 88, 90. |
= 46. |
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Packera obovata |
Packera bolanderi |
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Phenology | Flowering late Feb–Apr (south), early Apr–early Jun (north). | |||||
Habitat | Meadows in deciduous woodlands, wet ditches, stream banks, rocky hillsides | |||||
Elevation | 0–2500 m (0–8200 ft) | |||||
Distribution |
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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CA; OR; WA
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Discussion | Packera obovata forms relatively large, stoloniferous colonies in wet sites. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). The two varieties of Packera bolanderi have been treated as species. The morphologic characteristics used to distinguish the varieties vary widely within some populations. Presence or absence of multicellular hairs has been used to separate the varieties; that trait is also variable. The morphologic distinction is weak; habitat and elevation records lend support for recognizing two varieties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 594. | FNA vol. 20, p. 579. | ||||
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Senecio obovatus, Senecio aureus var. obovatus, Senecio elliottii, Senecio elongatus, Senecio rotundus | Senecio bolanderi | ||||
Name authority | (Muhlenberg ex Willdenow) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) | ||||
Web links |