Packera flettii |
Packera hyperborealis |
|
---|---|---|
Flett's groundsel, Flett's ragwort |
northern groundsel |
|
Habit | Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to erect). | Perennials, 6–20+ cm; fibrous-rooted or rhizomatous (rhizomes horizontal to suberect, stout). |
Stems | 1 or 2–5 (often scapiform), loosely clustered, glabrous or leaf axils sparsely hairy. |
usually 1, sometimes multiple, bases and leaf axils tomentose, otherwise glabrous. |
Basal leaves | (and proximal cauline) petiolate; blades obovate to ovate or sublyrate, 30–60+ × 10–40+ mm, bases tapering, margins deeply dissected or pinnatifid, ultimate margins crenate to crenate-dentate. |
(and proximal cauline) petiolate; blades oblanceolate to obovate or lyrate (pinnately lobed to pinnatifid, terminal lobes larger than laterals), 10–30+ × 10–20+ mm, bases tapering, ultimate margins ± crenate to serrate. |
Cauline leaves | abruptly reduced or 0 (sessile; ovate to obovate, dissected or pinnatifid). |
gradually to abruptly reduced (sessile; pinnatisect or entire). |
Peduncles | inconspicuously bracteate or ebracteate, glabrous. |
bracteate (bractlets purple-tinged), glabrous or glabrate. |
Ray florets | 5 or 8; corolla laminae 5–10 mm. |
0 (rarely) or 10–12; corolla laminae 8–10 mm. |
Disc florets | 20–30+; corolla tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. |
45–60+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
Phyllaries | (8–)13, light green (tips yellowish), 4–7 mm, glabrous. |
13, green (sometimes purple-tinged distally), 6–8 mm, glabrous. |
Calyculi | 0 or inconspicuous. |
0 or inconspicuous (bractlets purple-tinged). |
Heads | 4–10+ in subumbelliform cymiform arrays. |
1–2(–5+) in cymiform arrays. |
Cypselae | 1–1.5 mm, glabrous; pappi 4–4.5 mm. |
1.5–2.5 mm, hirtellous on ribs; pappi 6–7 mm. |
2n | = 40. |
= 46. |
Packera flettii |
Packera hyperborealis |
|
Phenology | Flowering early Jul–mid Aug. | Flowering mid Jun–early Aug. |
Habitat | Exposed slopes, rocky or gravelly soils | Open, dry, rocky or sandy areas, sometimes in fertile soils overlaying limestone |
Elevation | 700–2000 m (2300–6600 ft) | 0–900 m (0–3000 ft) |
Distribution |
OR; WA
|
AK; NT; NU; YT |
Discussion | Packera flettii is known from the Olympic Mountains and near Mt. Rainer in Washington and coastal mountains of Clatsop County, Oregon. It has a chromosome number unique in the genus and is not known to hybridize with other species of Packera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera hyperborealis is known only from lowland tundra from Alaska to the Mackenzie River and as far south as the northern end of the Franklin Mountains. It has also been collected as far north as Banks Island. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 587. | FNA vol. 20, p. 589. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio flettii | Senecio hyperborealis |
Name authority | (Wiegand) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Greenman) Á. Löve & D. Löve: Bot. Not. 128: 520. (1976) |
Web links |