Packera multilobata |
Packera layneae |
|
---|---|---|
lobeleaf groundsel |
Layne's ragwort |
|
Habit | Biennials or perennials, 20–40+ cm; taprooted (caudices ascending to erect, weakly branched). | Perennials, 40–70+ cm; taprooted (caudices erect to suberect, branched, stout). |
Stems | 1 or 2–5, loosely clustered, usually glabrous or glabrescent, sometimes sparsely tomentose throughout, axils (basal leaves) tomentose. |
1 or 3–4+, clustered, sparsely tomentose to glabrescent. |
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, relatively thick and turgid) petiolate; blades narrowly elliptic or lanceolate to oblanceolate, 40–70+ × 5–20+ mm, bases tapering, margins entire or subentire to weakly and irregularly dentate (especially at apices). |
Cauline leaves | gradually reduced (sessile). |
gradually reduced (distal sessile, bractlike). |
Peduncles | conspicuously bracteate, glabrous or tomentose. |
bracteate (bractlets usually red-tipped), sparsely tomentose to glabrate. |
Ray florets | 8–13; corolla laminae 7–10 mm. |
5 or 8; corolla laminae 12–16 mm. |
Disc florets | 40–50+; corolla tubes 4–5 mm, limbs 3–4 mm. |
50–60+; corolla tubes 3.5–4.5 mm, limbs 4.5–5.5 mm. |
Phyllaries | 13–21, green (tips often yellow), 4–9+ mm, glabrous or sparsely tomentose (at least proximally). |
13 or 21, dark green proximally, becoming light green distally (tips red), 7–11+ mm, floccose-tomentose proximally. |
Calyculi | conspicuous. |
conspicuous (bractlets red-tipped). |
Heads | 10–30+ in open, corymbiform or subumbelliform arrays. |
5–12+ in open, cymiform arrays. |
Cypselae | 2–3 mm, glabrous or hirtellous on ribs; pappi 5–6 mm. |
2.5–3.5 mm, glabrous; pappi 7–8 mm. |
2n | = 46, 92. |
= 92. |
Packera multilobata |
Packera layneae |
|
Phenology | Flowering early May–mid Jul. | Flowering early May–early Jul. |
Habitat | Dry rocky or sandy soils in sagebrush, woodlands, and subalpine areas | Openings, disturbed areas, in chaparral, serpentine soils |
Elevation | 1200–2900 m (3900–9500 ft) | 300–900 m (1000–3000 ft) |
Distribution |
AZ; CA; CO; ID; NM; NV; UT; WY
|
CA |
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.) |
Of conservation concern. Packera layneae is known only from the foothills of the western slope of the Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 592. | FNA vol. 20, p. 590. |
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 layneae, Senecio fastigiatus var. layneae |
Name authority | (Torrey & A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
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