| 词条 | Barkleyanthus |
| 释义 |
| image = Barkleyanthus salicifolius syn senecio salignus.jpg |status = G4 |status_system = TNC | regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus = Senecioneae | genus = Barkleyanthus | genus_authority = H.Rob. & Brettell | species = B. salicifolius | binomial = Barkleyanthus salicifolius |binomial_authority = (Kunth) H.Rob. & Brettell |synonyms_ref=[1] |synonyms = *Cineraria salicifolia Kunth
}}Barkleyanthus is a monotypic genus[2] of flowering plants in the aster family, Asteraceae, containing the single species Barklyanthus salicifolius, a plant formerly classified in the genus Senecio.[3][4][5] It is native to North and Central America, where its distribution extends from the southwestern United States to El Salvador.[4] Its common names include willow ragwort,[5] willow groundsel, Barkley's-ragwort,[6] and jarilla.[2] This plant is a shrub producing a branching stem usually about one to two meters tall, but known to exceed 4 meters at times. The leaves are roughly lance-shaped and are alternately arranged, sometimes more densely toward the ends of branches. They are up to 10 or 15 centimeters long. The inflorescence is often a wide array of several flower heads, but they may also be clustered in the leaf axils or branch tips. The head contains a few yellow ray florets, which are pistillate, and up to 25 or more yellow disc florets, which are bisexual. The fruit is a rough-textured, pyramidal or prism-shaped cypsela up to a centimeter long including its pappus of many barbed white bristles.[3] This plant is abundant in parts of its range, particularly in Mexico, sometimes becoming weedy.[3] It flowers year-round, especially in spring,[3] and it may be in full flower at the end of the dry season.[2] It is admired for its yellow flower heads and is cultivated as an ornamental plant.[2][3] The plant is used in Mexican traditional medicine to treat fever and rheumatism.[7] In Chiapas it is used as an insecticide in corn supplies.[7] Secondary metabolites isolated from the species include pyrrolizidine alkaloids, lactones, furoeremophilanes, and sesquiterpenes.[7] References1. ^The Plant List, Barkleyanthus salicifolius (Kunth) H.Rob. & Brettell {{Taxonbar|from=Q4861088}}{{Senecioneae-stub}}2. ^1 2 3 de Vivar, A. R., et al. (2007). Secondary metabolites from Mexican species of the tribe Senecioneae (Asteraceae). Revista de la Sociedad Química de México 51(3), 160-72. 3. ^1 2 3 4 Barkleyanthus salicifolius. Flora of North America. 4. ^1 {{GRIN | Barkleyanthus salicifolius | 452824 | accessdate = 21 January 2018}} 5. ^1 [https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=509455 Barkleyanthus salicifolius.] Integrated Taxonomic Information System (ITIS). 6. ^Barkleyanthus salicifolius. NatureServe. 2013. 7. ^1 2 González, C. P., et al. (2013). [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3652123/ Anti-inflammatory activity and composition of Senecio salignus Kunth.] BioMed Research International 2013. 3 : Senecioneae|Monotypic Asteraceae genera|Flora of North America |
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