Packera ionophylla |
Packera indecora |
|
---|---|---|
Tehachapi ragwort |
elegant groundsel, rayless mountain butterweed, rayless mountain groundsel, rayless mountain ragwort |
|
Habit | Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). | Perennials, 10–100 cm; taprooted (caudices erect to suberect, relatively stout, branched). |
Stems | usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-tomentose or glabrescent. |
1 or 2–3, loosely clustered, glabrous or glabrate. |
Basal leaves | (and proximal cauline, relatively turgid) petiolate; blades broadly ovate or lyrate (± pinnately lobed, lateral lobes 1–3 pairs, smaller than terminals), 10–30+ × 10–20+ mm, bases tapering to cuneate, ultimate margins subentire or crenate to coarsely dentate (abaxial faces tomentose). |
petiolate; blades elliptic-ovate, oblong, or subreniform, 20–50 × 10–40+ mm, bases subcordate, truncate, or cuneate, margins usually crenate-dentate to coarsely dentate-lacerate, seldom subentire. |
Cauline leaves | gradually reduced (sessile; bractlike, entire). |
gradually reduced (petiolate, resembling basals, sublyrate or dissected; distal sessile, subentire to pinnatifid). |
Peduncles | bracteate, irregularly tomentose. |
ebracteate (or bractlets inconspicuous), glabrous or glabrate. |
Ray florets | 8–13; corolla laminae 8–10 mm. |
0 or 8–10; corolla laminae (deep yellow) 3–5 mm. |
Disc florets | 60–75+; corolla tubes 2.5–4 mm, limbs 3.5–5 mm. |
60–70+; corolla tubes 2–3 mm, limbs 2.5–3.5 mm. |
Phyllaries | (8–)13 or 21, green, 7–10+ mm, densely tomentose proximally, glabrescent distally (tips hair-tufted). |
13 or 21, green (tips sometimes reddish), 7–9 mm, glabrous. |
Calyculi | inconspicuous. |
conspicuous (bractlets green, tips sometimes reddish). |
Heads | 3–6 in cymiform arrays. |
8–20+ in subumbelliform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 5–7 mm. |
1–2 mm, glabrous; pappi 3–4 mm. |
2n | = 46. |
= 46, 126, 176, 184. |
Packera ionophylla |
Packera indecora |
|
Phenology | Flowering early Jun–late Aug. | Flowering mid Jun–late Aug. |
Habitat | Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands | Damp meadows, along streams, wet woodlands |
Elevation | 1400–3000 m (4600–9800 ft) | 0–2300 m (0–7500 ft) |
Distribution |
CA
|
AK; CA; ID; MI; MN; MT; WA; WY; AB; BC; LB; MB; NT; NU; ON; QC; SK; YT
|
Discussion | Of conservation concern. Packera ionophylla is known only from the San Bernardino, San Gabriel, and Tehachapi mountains and a population on Alamo Mountain in eastern Ventura County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera indecora is found at relatively low elevations in eastern Canada and at middle to subalpine elevations in the western cordillera. It closely resembles P. pauciflora and it is often difficult to identify specimens in the herbarium. Biosystematic studies (J. F. Bain and J. Whitton 1994) have indicated that although they are morphologically similar, P. indecora and P. pauciflora have distinctly different physiologies and should be maintained as distinct taxa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 590. | FNA vol. 20, p. 590. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio ionophyllus, Senecio ionophyllus var. intrepidus | Senecio indecorus, Senecio burkei, Senecio idahoensis, Senecio pauciflorus subsp. fallax |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (Greene) Á. Löve & D. Löve: Bot. Not. 128: 520. (1976) |
Web links |