| 词条 | Polygonum spergulariiforme |
| 释义 |
| image = | genus = Polygonum | species = spergulariiforme | authority = Meisn. ex Small 1892 | synonyms_ref = [1] | synonyms = *Polygonum sperguliaeforme Meisn. ex Small
}}Polygonum spergulariiforme is a North American species of flowering plants in the buckwheat family known by the common name spurry knotweed or fall knotweed. It grows in western Canada (British Columbia and Saskatchewan) and the western United States (primarily Washington, Oregon, and northern and central California but with a few isolated populations in Idaho, Wyoming and Montana).[3][4]Polygonum spergulariiforme is a green, branching herb up to {{convert|50|cm|in|abbr=on}} tall. Leaves are narrow, up to {{convert|6|cm|in|abbr=on}} long. Flowers are pink or white, in dense, elongated clumps. The plant flowers from June to October, later than some of its relatives.[5] References1. ^Tropicos, Polygonum spergulariiforme Meisn. ex Small 2. ^[https://www.biodiversitylibrary.org/page/654015#page/463/mode/1up Meisner, Carl Daniel Friedrich, in Small, John Kunkel. 1892. Bulletin of the Torrey Botanical Club 19(12): 366. ] Polygonum sperguliaeforme 3. ^Biota of North America Program 2014 county distribution map 4. ^Calflora taxon report, University of California, Polygonum spergulariiforme Meisn. ex Small Spurry knotweed 5. ^Flora of North America, Polygonum spergulariiforme Meisner ex Small, 1892. (as spergulariaeforme). Spurry or fall knotweed External links{{commons-inline|Polygonum spergulariiforme|Polygonum spergulariiforme}}
11 : Polygonum|Flora of the Northwestern United States|Flora of British Columbia|Flora of California|Flora of the Cascade Range|Flora of the Klamath Mountains|Flora of the Sierra Nevada (U.S.)|Natural history of the California chaparral and woodlands|Plants described in 1856|Taxa named by Carl Meissner|Taxa named by John Kunkel Small |
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