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New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort

Ogotoruk Creek butterweed, Ogotoruk Creek ragwort

Habit Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). Perennials, 8–15+ cm; fibrous-rooted or ± rhizomatous (bases horizontal to ascending).
Stems

1, glabrous or leaf axils sparsely tomentose.

1 (often branched proximally, sometimes distally), sparsely to densely floccose-tomentose.

Basal leaves

(and proximal cauline) petiolate;

blades narrowly ovate to oblong-lanceolate, 30–70+ × 10–20+ mm, bases abruptly contracted to subcordate, margins usually serrate-dentate, sometimes subcrenate (apices acute).

petiolate;

blades elliptic to oblanceolate or ovate, 20–80+ × 20–60+ mm, bases tapering, margins entire, crenate-serrate, or irregularly to pinnately lobed (abaxial faces white-tomentose, adaxials patchy tomentose to glabrate).

Cauline leaves

gradually reduced (± sessile; lacerate to subcrenate).

gradually to abruptly reduced (sessile; mids lanceolate to oblanceolate, irregularly serrate to pinnately lobed, distals bractlike).

Peduncles

bracteate, glabrous.

bracteate, ± tomentose.

Ray florets

8–13;

corolla laminae 4–7 mm.

10–13+;

corolla laminae 8–12+ mm.

Disc florets

50–70+;

corolla tubes 3.5–4 mm, limbs 3–3.5 mm.

60–70+;

corolla tubes 1–1.5 mm, limbs 2–2.5 mm.

Phyllaries

13 or 21, light green (tips sometimes black), 5–8 mm, glabrous.

13 or 21, green (sometimes with purple streaks, tips usually purple), 4–8 mm, proximally tomentose, rarely glabrous.

Calyculi

conspicuous.

conspicuous (bractlets purple-tinged).

Heads

8–20+ in loose, corymbiform arrays.

1(–3).

Cypselae

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1–1.5 mm, glabrous;

pappi 2.5–3 mm.

2n

= 44.

= 92.

Packera schweinitziana

Packera ogotorukensis

Phenology Flowering May–Jul. Flowering mid Jun–mid Jul (maritime), early Jul–early Aug (continental).
Habitat Sunny, wet areas, meadows, swamps, ditches, roadsides Open rocky/gravelly areas, tundra, talus slopes, stream banks, roadsides
Elevation 100–1800 m (300–5900 ft) 0–1800 m (0–5900 ft)
Distribution
from FNA
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; BC; NT; YT
[BONAP county map]
Discussion

Packera schweinitziana is rarely mistaken for any other taxon. It grows on slightly acidic soils and may reproduce vegetatively by branched rhizomes. The group of populations on Roan Mountain on the Tennessee-North Carolina border is disjunct from the main distribution.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Plants of Packera ogotorukensis have been treated as a disjunct of P. conterminus (as Senecio conterminus). Gross morphology, cytological data, and pollen morphology all provide good evidence for recognition of P. ogotorukensis as a distinct species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 20, p. 598. FNA vol. 20, p. 594.
Parent taxa Asteraceae > tribe Senecioneae > Packera Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio schweinitzianus, Senecio aureus var. lanceolatus, Senecio robbinsii Senecio ogotorukensis
Name authority (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) (Packer) Á. Löve & D. Löve: Bot. Not. 128: 520. (1976)
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