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Cox, Fran

Senecio triangularis

Senecio triangularis Hook.

Arrowleaf Ragwort, Arrowleaf Groundsel

Asteraceae (Aster Family)

Synonym(s): Senecio gibbsonsii, Senecio triangularis var. angustifolius

USDA Symbol: setr

USDA Native Status: L48 (N), AK (N), CAN (N)

Broadly or narrowly triangular or arrowhead-shaped leaves, with many sharp teeth on edges, grow on several leafy stems that bear yellow flower heads in a branched, flattish cluster at top.

As indicated by the common and technical names, the triangular leaves are distinctive.

From the Image Gallery

8 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub
Size Notes: Up to about 6 feet tall, often much shorter.
Leaf: Green
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Yellow
Bloom Time: Jun , Jul , Aug , Sep

Distribution

USA: AK , CA , CO , ID , MT , NM , NV , OR , UT , WA , WY
Canada: AB , BC , NT
Native Distribution: Alaska and western Canada; south to southern California, Arizona, and New Mexico.
Native Habitat: Stream banks and other moist places in the mountains.

Growing Conditions

Water Use: High
Light Requirement: Part Shade
CaCO3 Tolerance: Medium

Benefit

Conspicuous Flowers: yes

Find Seed or Plants

View propagation protocol from Native Plants Network.

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:		FACW	FACW			OBL				FACW

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Senecio triangularis in USDA Plants
FNA: Find Senecio triangularis in the Flora of North America (if available)
Google: Search Google for Senecio triangularis

Metadata

Record Modified: 2023-01-16
Research By: TWC Staff

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