Senecio triangularis
Template:Short description Template:Speciesbox
Senecio triangularis, known as arrowleaf ragwort,[1] arrowleaf groundsel and arrowleaf butterweed, is a species of the genus Senecio and family Asteraceae.
Description
It is similar in form to Senecio serra, both being four feet tall, have narrow and serrated leaves, and are topped with many small, yellow sunflowers. but S. triangularis is more common.[2] S. triangularis has single erect stems, reaching up to Script error: No such module "convert". tall.[3] The stems have evenly distributed leaves.[4] The leaves are up to Script error: No such module "convert". long and triangular with tapered ends,[4][2] hence the name.[5]
The green involucral bracts have black tips with hairy tufts.[6] On display from June to September, the yellow flower heads are up to Script error: No such module "convert". wide, with about 8 rays around a disk.[5]
As some plants are diploid, meaning having two sets of chromosomes; this can be used to identify hybrids and classification of groupings. It has been counted as 2n = 40, 80.[4]
Script error: No such module "Gallery".
Taxonomy
It has the common names of arrowleaf ragwort, arrowleaf groundsel,[3] and arrowleaf butterweed.
In the early 1830s, Scottish botanist Thomas Drummond collected this plant, probably on his second trip to the United States. The plant was named by Drummond's mentor, William Jackson Hooker, who first published and described it in 1834.[4][2]
Distribution and habitat
It is native to temperate regions of America:[7]
- Nearctic:
- Subarctic America: Northwest Territory, Yukon Territory, Alaska
- Western Canada: Alberta, British Columbia
- Northwestern United States: Colorado, Idaho, Montana, Oregon, Washington, Wyoming
- Southwestern United States: Arizona, California, Nevada, Utah, New Mexico
It grows in open woodlands, (mainly coniferous forests) and on rocky stream sides.[4][2] They can grow at altitudes of between Script error: No such module "convert"..[4]
Ecology
It is reportedly poisonous to animals.[8]
References
<templatestyles src="Reflist/styles.css" />
- ↑ Script error: No such module "template wrapper".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d e f Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:GRIN
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".
External links
- Pages with script errors
- Pages with reference errors
- Senecio
- Alpine flora
- Flora of Subarctic America
- Flora of Western Canada
- Flora of the Northwestern United States
- Flora of the West Coast of the United States
- Flora of the Southwestern United States
- Flora of the Sierra Nevada (United States)
- Flora of the Rocky Mountains
- Flora without expected TNC conservation status