|
arrow-leaf groundsel, arrow-leaf ragwort, arrowleaf butterweed, groundsel
|
Mount Sheldon butterweed, Mount Sheldon ragwort, Mt. Sheldon ragwort
|
| Perennials, (20–)50–120(–200) cm (caudices branched, ± woody). |
Perennials, 30–40(–50) cm (caudices branched, fibrous-rooted). |
glabrous or sparsely floccose-tomentose when young. |
glabrous or with scattered hairs near leaf bases and among heads. |
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 or subsessile; blades lanceolate, 4–10 × 2–4 cm, bases ± tapered, margins denticulate (distal leaves sessile, smaller). |
± 8; corolla laminae 9–15 mm. |
± 8; corolla laminae ± 10 mm. |
(± 8) ± 13 (± 21), 6–10 mm, tips usually green, rarely black. |
± 13, 7–10 mm, tips black (hairy). |
of 2–6 bractlets (rarely more than 2 mm). |
of 3–7 bractlets (0.5–3 mm). |
10–30(–60) in corymbiform to subracemiform arrays. |
(1–)3–5(–6) in cymiform arrays. |
glabrous. |
glabrous. |
= 40, 80. |
|
|
|
|
|
| Flowering summer. |
Flowering late Jul–mid Aug. |
| Damp places, open woodlands, especially rocky stream banks in coniferous forests |
Subalpine meadows and valleys |
| 100–3300 m (300–10800 ft) |
1200–1800 m (3900–5900 ft) |
|
AK; AZ; CA; CO; ID; MT; NM; NV; OR; WA; WY; AB; BC; NT; YT; PH
|
BC; NT; YT |
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.) |
Senecio sheldonensis is infrequently collected and poorly understood. The treatment here is provisional. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 566. |
FNA vol. 20, p. 567. |
| 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. 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) |
A. E. Porsild: Canad. Field-Naturalist 64: 43. (1950) |
| |
BC
CA
OR
WA
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
