Senecio neowebsteri |
Senecio cannabifolius |
|
---|---|---|
Olympic Mountain ragwort |
Aleutian ragwort |
|
Habit | Perennials, 7–15(–20+) cm (rhizomes fibrous-rooted). | Perennials, (50–)100–150+ cm (rhizomes fibrous-rooted). |
Herbage | (sometimes purplish-tinged) floccose-tomentose, unevenly glabrescent. |
unevenly tomentose, glabrescent, except persistently hairy on abaxial faces of leaves. |
Stems | single or loosely clustered (erect or arching). |
single. |
Leaves | mostly cauline; petiolate (petioles about equaling blades); blades lanceolate or oblanceolate to ovate, (2–)4–8+ × 1.5–3 cm, bases tapered, margins denticulate (distal leaves smaller, lanceolate or linear-lanceolate, bractlike). |
± evenly distributed (basal and proximal withering before flowering); mostly petiolate (proximal); blades oblong or ovate to oblong-lanceolate (pinnately or subpalmately parted, primary lobes 3–6+, lanceolate to lance-linear, 3–8+ cm), 10–20+ × 8–15+ cm, bases ± tapered, ultimate margins serrate (distal leaves similar, sessile, smaller). |
Ray florets | ± 13; corolla laminae ± 15 mm. |
± 5; corolla laminae ca. 10 mm. |
Phyllaries | usually ± 21, sometimes ± 13, (8–)10–15 mm, tips usually greenish (often sparsely hairy). |
± 13, 4–6 mm, tips green. |
Calyculi | of 4–8 lanceolate to lance-linear bractlets (lengths mostly less than 1/2 phyllaries). |
0 or of 1–5+ subulate bractlets (lengths about 1/3 phyllaries). |
Heads | nodding, 1(–2). |
20–50 in corymbiform arrays. |
Cypselae | glabrous. |
glabrous. |
2n | = 40. |
= 40. |
Senecio neowebsteri |
Senecio cannabifolius |
|
Phenology | Flowering late summer–early fall. | Flowering summer. |
Habitat | High talus slopes | Open meadows and slopes |
Elevation | 2200–2600 m (7200–8500 ft) | 0–100 m (0–300 ft) |
Distribution |
WA
|
AK; Eurasia |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Senecio cannabifolius barely enters the flora from far-eastern Asia. Infraspecific taxa are recognized within S. cannabifolius in some floras of Asiatic regions; our plants are referable to var. cannabifolius. Senecio cannabifolius has been treated in Jacobaea by E. Wiebe (2000); see discussion under 53. S. jacobaea. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 553. | FNA vol. 20, p. 569. |
Parent taxa | Asteraceae > tribe Senecioneae > Senecio | Asteraceae > tribe Senecioneae > Senecio |
Sibling taxa | ||
Synonyms | S. websteri | Jacobaea cannabifolia, S. palmatus |
Name authority | S. F. Blake: Leafl. W. Bot. 8: 143. (1957) | Lessing: Linnaea 6: 242. (1831) |
Web links |