|
arrow-leaf groundsel, arrow-leaf ragwort, arrowleaf butterweed, groundsel
|
dandelion ragwort
|
| Perennials, (20–)50–120(–200) cm (caudices branched, ± woody). |
Perennials, 5–10(–14) cm (caudices branched, fibrous-rooted). |
glabrous or sparsely floccose-tomentose when young. |
(sometimes purple-tinged) floccose-tomentose (persistently on abaxial faces of leaves, glabrescent elsewhere). |
single or loosely clustered. |
single or loosely clustered. |
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). |
± evenly distributed; petiolate; blades oblanceolate to ovate, (1–)2–6 × 1–2.5 cm, bases tapered, margins dentate or incised to subpinnatifid (distal leaves bractlike). |
± 8; corolla laminae 9–15 mm. |
usually ± 13, sometimes fewer or 0; corolla laminae 8–12 mm. |
(± 8) ± 13 (± 21), 6–10 mm, tips usually green, rarely black. |
± 13 or ± 21, 7–10 mm, tips green. |
of 2–6 bractlets (rarely more than 2 mm). |
of 2–5 lance-linear bractlets (lengths 1/3–2/3 phyllaries). |
10–30(–60) in corymbiform to subracemiform arrays. |
1(–5). |
glabrous. |
glabrous. |
= 40, 80. |
= 40. |
|
|
|
|
| Flowering summer. |
Late summer. |
| Damp places, open woodlands, especially rocky stream banks in coniferous forests |
Alpine peaks |
| 100–3300 m (300–10800 ft) |
3500–4000 m (11500–13100 ft) |
|
AK; AZ; CA; CO; ID; MT; NM; NV; OR; WA; WY; AB; BC; NT; YT; PH
|
CO; NM |
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.) |
|
| FNA vol. 20, p. 566. |
FNA vol. 20, p. 551. |
| 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. 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. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii |
| S. gibbonsii, S. saliens, S. triangularis var. angustifolius |
S. amplectens var. taraxacoides, Ligularia taraxacoides |
| Hooker: Fl. Bor.-Amer. 1: 332, plate 115. (1834) |
(A. Gray) Greene: Pittonia 4: 119. (1900) |
| |
BC
CA
OR
WA
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