| 词条 | Tetradymia tetrameres |
| 释义 |
|regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus = Senecioneae |genus = Tetradymia |species = T. tetrameres |binomial = Tetradymia tetrameres |binomial_authority = (S.F.Blake) Strother |}} Tetradymia tetrameres is a species of flowering plant in the aster family known by the common name fourpart horsebrush[1] and dune horsebrush. It is native to the Great Basin, where it occurs in western Nevada and just over the border in Mono County, California. It is a plant of dry scrub and sand dunes. It is a bushy, woolly shrub with many erect, spineless branches. It is the largest of the horsebrushes, growing up to two meters in height.[2] The soft, woolly leaves are narrow and threadlike, growing up to 4 centimeters long. Shorter leaves occur in clusters around the primary leaves. The inflorescence bears 4 to 6 flower heads which are each enveloped in four or five woolly phyllaries. Each head contains up to four or five light yellow flowers each around a centimeter long. The fruit is a hairy achene which may be up to a centimeter long, including its pappus of long bristles. References1. ^{{PLANTS|id=TETE4|taxon=Tetradymia tetrameres|accessdate=9 December 2015}} 2. ^Mozingo, H. N. (1987). [https://books.google.com/books?id=ziSx1F854OUC&pg=PA317&lpg=PA317&dq=tetradymia+tetrameres&source=bl&ots=T9nrmKozGV&sig=QKGkZ0Hvw1yK5acWM7Tkvzsz_kY&hl=en&ei=LTWrTLGKEo2osQPA7-DdAw&sa=X&oi=book_result&ct=result&resnum=8&ved=0CDAQ6AEwBzgK#v=onepage&q=tetradymia%20tetrameres&f=false Shrubs of the Great Basin: A Natural History.] University of Nevada Press 317-8. External links
4 : Senecioneae|Flora of California|Flora of Nevada|Plants described in 1922 |
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