|
arrow-leaf groundsel, arrow-leaf ragwort, arrowleaf butterweed, groundsel
|
San Gabriel ragwort
|
| Perennials, (20–)50–120(–200) cm (caudices branched, ± woody). |
Perennials, 40–100 cm (caudices unknown). |
glabrous or sparsely floccose-tomentose when young. |
unevenly floccose-lanate or tomentose, glabrescent. |
single or loosely clustered. |
single. |
evenly distributed; petiolate; blades narrowly triangular, (3–)4–10+ × 2–6 cm, bases usually ± truncate, sometimes tapered, margins usually dentate, rarely subentire (distal leaves subsessile, smaller). |
progressively reduced distally; petiolate; blades elliptic-ovate to lanceolate, 10–20(–30?) × 3–7+ cm, bases tapered, margins dentate to denticulate (teeth cartilaginous; mid leaves similar, sessile, smaller; distal leaves bractlike). |
± 8; corolla laminae 9–15 mm. |
0. |
(± 8) ± 13 (± 21), 6–10 mm, tips usually green, rarely black. |
± 21, 7–8 mm, tips greenish. |
of 2–6 bractlets (rarely more than 2 mm). |
of 5–8+ lance-linear to filiform bractlets (lengths 1/3–7/8 phyllaries). |
10–30(–60) in corymbiform to subracemiform arrays. |
10–20+ in loose or congested, cymiform arrays. |
glabrous. |
glabrous. |
= 40, 80. |
= 40. |
|
|
|
|
| Flowering summer. |
Flowering spring. |
| Damp places, open woodlands, especially rocky stream banks in coniferous forests |
Steep, rocky slopes |
| 100–3300 m (300–10800 ft) |
400–1500 m (1300–4900 ft) |
|
AK; AZ; CA; CO; ID; MT; NM; NV; OR; WA; WY; AB; BC; NT; YT; PH
|
CA |
Plants of Senecio triangularis with narrow, subentire leaves that taper to the petioles are occasionally encountered in acid bogs in Oregon and Washington and less frequently elsewhere. They are regarded as edaphic variants; they have been recognized as var. angustifolius. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Senecio astephanus is collected infrequently. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 566. |
FNA vol. 20, p. 553. |
| Asteraceae > tribe Senecioneae > Senecio |
Asteraceae > tribe Senecioneae > Senecio |
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, 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. viscosus, S. vulgaris, S. warnockii, S. wootonii |
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, 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. gibbonsii, S. saliens, S. triangularis var. angustifolius |
|
| Hooker: Fl. Bor.-Amer. 1: 332, plate 115. (1834) |
Greene: Pittonia 1: 174. (1888) |
| |
BC
CA
OR
WA
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