|
California groundsel, chaparral ragwort, rayless ragwort
|
Aleutian ragwort
|
| Annuals, 5–20+ cm (taproots relatively short and thin). |
Perennials, (50–)100–150+ cm (rhizomes fibrous-rooted). |
glabrous or sparsely tomentose (especially distally). |
unevenly tomentose, glabrescent, except persistently hairy on abaxial faces of leaves. |
usually 1 (relatively thin, delicate). |
single. |
evenly distributed; sessile; blades oblanceolate to lance-linear, 2–4 × 0.5–1 cm, bases sometimes weakly clasping, margins usually subpinnate to dentate, sometimes subentire (distal leaves 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). |
0 or 1–5; corolla laminae 0.5–1+ mm (barely surpassing phyllaries, heads perhaps technically disciform). |
± 5; corolla laminae ca. 10 mm. |
± 8 or ± 13, 5–6 mm, tips greenish. |
± 13, 4–6 mm, tips green. |
0 or of 1–3+ lance-deltate bractlets. |
0 or of 1–5+ subulate bractlets (lengths about 1/3 phyllaries). |
4–10+ in open, cymiform arrays. |
20–50 in corymbiform arrays. |
densely hairy. |
glabrous. |
= 40. |
= 40. |
|
|
|
|
| Flowering late winter–spring. |
Flowering summer. |
| Dry, open ground, especially alkaline flats |
Open meadows and slopes |
| 10–400 m (0–1300 ft) |
0–100 m (0–300 ft) |
|
CA; Mexico (Baja California)
|
AK; Eurasia |
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.) |
| FNA vol. 20, p. 563. |
FNA vol. 20, p. 569. |
| Asteraceae > tribe Senecioneae > Senecio |
Asteraceae > tribe Senecioneae > Senecio |
S. actinella, S. amplectens, S. ampullaceus, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii |
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii |
|
Jacobaea cannabifolia, S. palmatus |
| Greene: Pittonia 1: 220. (1888) |
Lessing: Linnaea 6: 242. (1831) |
| |
CA
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iNaturalist
USDA Plants Database
