Packera breweri |
Packera franciscana |
|
---|---|---|
Brewer's ragwort |
San Francisco Peaks ragwort |
|
Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 3–7+ cm; rhizomatous (rhizomes creeping, ascending). |
Stems | 1, glabrous or leaf axils tomentose. |
1 (often purplish), sparsely lanate or arachno-tomentose, glabrescent. |
Basal leaves | (and proximal cauline) petiolate; blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous). |
petiolate; blades lyrate to sublyrate (midribs winged) or ovate to orbiculate, 10–20+ × 30–50+ mm, bases tapering to contracted, ultimate margins ± dentate (faces glabrate at flowering). |
Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually reduced (sessile; usually bractlike and entire, sometimes larger and pinnatifid). |
Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
conspicuously bracteate (bractlets red-tipped), densely lanate-tomentose. |
Ray florets | 8–10+; corolla laminae 10–15+ mm. |
8 or 13; corolla laminae 5–10 mm. |
Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
30–40+; corolla tubes 2–3 mm, limbs 2.5–3.5 mm. |
Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
13 or 21, purplish, 6–9 mm, sparsely tomentose. |
Calyculi | inconspicuous. |
conspicuous (bractlets reddish or purple). |
Heads | 15–50+ in corymbiform arrays. |
borne singly or 2–6 in compact, cymiform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
1.5–2 mm, glabrous; pappi 5–6 mm. |
2n | = 46. |
= 46. |
Packera breweri |
Packera franciscana |
|
Phenology | Flowering mid Apr–late May. | Flowering mid Aug–mid Oct. |
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | Talus slopes, rock crevices, above timberline |
Elevation | 200–1500 m (700–4900 ft) | 3200–3800 m (10500–12500 ft) |
Distribution |
CA
|
AZ |
Discussion | Packera breweri is known only from Coast Ranges from San Francisco Bay to Los Angeles County and along the eastern edges of the San Joaquin Valley. Populations are relatively small and sporadic; the plants appear not to hybridize with other species of Packera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Packera franciscana is known only from above timberline in the San Francisco Peaks and is in the Center for Plant Conservation’s National Collection of Endangered Plants. It spreads by extensive rhizomes and is fairly abundant locally. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 580. | FNA vol. 20, p. 587. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio breweri | Senecio franciscanus |
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
Web links |