Packera breweri |
Packera millelobata |
|
---|---|---|
Brewer's ragwort |
Uinta ragwort |
|
Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 30–50+ cm; taprooted or ± rhizomatous (bases weakly creeping, horizontal to erect). |
Stems | 1, glabrous or leaf axils tomentose. |
1 or 2–5+, loosely clustered, glabrous or leaf axils sparsely tomentose. |
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). |
(and proximal cauline) petiolate; blades narrowly lanceolate (pinnatifid, lateral lobes 6+ pairs, their bases petioluliform, terminal lobes smaller than laterals), 60–100 × 10–20 mm, bases tapering, ultimate margins dentate. |
Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually reduced (sessile). |
Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
bracteate or ebracteate, glabrous. |
Ray florets | 8–10+; corolla laminae 10–15+ mm. |
(8–)13; corolla laminae 8–10+ mm. |
Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
40–55+; corolla tubes 2–3 mm, limbs 2–3 mm. |
Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
(13–)21, green (tips yellow), 4–6+ mm, glabrous. |
Calyculi | inconspicuous. |
inconspicuous. |
Heads | 15–50+ in corymbiform arrays. |
6–20+ in corymbiform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
1–1.5 mm, hirtellous on ribs; pappi 3.5–4.5 mm. |
2n | = 46. |
|
Packera breweri |
Packera millelobata |
|
Phenology | Flowering mid Apr–late May. | Flowering late Mar–early Jun. |
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | Streambeds, openings in wooded areas on limestone-derived soils or on igneous-derived soils that are damp during growing season |
Elevation | 200–1500 m (700–4900 ft) | 1400–2100 m (4600–6900 ft) |
Distribution |
CA
|
TX; Mexico (Chihuahua, Coahuila) |
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.) |
In the flora area, Packera millelobata occurs only in the trans-Pecos region of western Texas. It has been confused with P. tampicana. Their ranges overlap along the Rio Grande; P. millelobata has leaves with narrow terminal lobes; P. tampicana has terminal lobes as wide as the leaf blade. In addition, P. tampicana is annual with pronounced taproots; P. millelobata is perennial with taprooted caudices. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 580. | FNA vol. 20, p. 592. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio breweri | Senecio millelobatus |
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Rydberg) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
Web links |