Facelis retusa
| Facelis retusa | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Facelis |
| Species: | F. retusa
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| Binomial name | |
| Facelis retusa | |
| Synonyms[1] | |
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Facelis retusa, the annual trampweed,[2] is a South American species of flowering plant in the family Asteraceae. It is native Brazil, Bolivia, Paraguay, Uruguay, northern Argentina, Chile; naturalized in parts of Africa,[3] Australia, and North America including the southeastern and south-central United States, and considered as a noxious weed in some of those places.[4][5][6][7]
Facelis retusa is an annual herb with the stems up to 30 cm (1-foot) long, very often trailing along the surface of the ground. Leaves are crowded along the stem, each up to 3 cm (1 in) long. Flower heads are in clusters, with white or purple disc flowers but no ray flowers. The achene has several long, feathery bristles that give a white appearance and assure effective seed dispersal.[8]
References
[edit]- ^ The Plant List, Facelis retusa (Lam.) Sch.Bip.
- ^ NRCS. "Facelis retusai". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 14 July 2015.
- ^ Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).
- ^ Biota of North America Program 2014 county distribution map
- ^ Frank M. Watson, University of Georgia, College of Agricultural and Environmental Sciences, Weed covers turfgrass with snowy appearance
- ^ Tropicos, Facelis retusa (Lam.) Sch. Bip.
- ^ Atlas of Living Australia
- ^ Flora of North America, Facelis Cassini, 1819.
External links
[edit]- TurfFiles - North Carolina State University photos, description on weed control methods
- Southeastern Flora several photos
- Alabama Plants photo