Senecio triangularis

(Arrowleaf Ragwort)

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Senecio triangularis, FR 679, Ophir Pass Rd., San Juan Co. 8394

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Senecio triangularis, Mohawk Lakes, Summit Co. 2529

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Senecio triangularis, Black Powder Pass, Summit Co. 4278

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Senecio triangularis, FR 679, Ophir Pass Rd., San Juan Co. 8399

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Senecio triangularis, Mayflower Gulch, Summit Co. 3841

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Senecio triangularis, Mayflower Gulch, Summit Co. 8440

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Senecio triangularis with Philonotis fontana moss, Crystal Lakes, Summit Co. 0659

Scientific Name Senecio triangularis USDA PLANTS Symbol SETR
Common Name Arrowleaf Groundsel, Arrowleaf Ragwort ITIS Taxonomic Serial No. 36090
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Montane and subalpine (6500 to 13500 ft.); moist areas in meadows, along streams and ponds.
Plant: Perennial, 1 to 5 feet tall, with usually smooth, stout, leafy stems.
Leaves: Alternate, triangular-shaped, 1-3/4 to 8 inches long and half as wide; coarsely-toothed edges and smooth surfaces.
Inflorescence: Composite flower heads about an inch across in corymb-like clusters of 10 to 30; each flower with about 8 narrow yellow rays and relatively small center with darker yellow disk florets; green, smooth phyllaries below.
Bloom Period:July to September.
References: "Flora of Colorado" by Jennifer Ackerfield, "Guide to Colorado Wildflowers" by G.K. Guennel and SEINet.
BONAP Distribution Map


Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County