| 词条 | Cirsium brevifolium |
| 释义 |
|image = |image_caption = |genus = Cirsium |species = brevifolium |authority = Nutt. |synonyms_ref = [1] |synonyms =
}}Cirsium brevifolium is a North American species of plants in the thistle tribe within the sunflower family. Common name is Palouse thistle. The species is native to the northwestern United States, in the States of Washington, Oregon, and Idaho.[2] The plant is particularly common in the Palouse Prairie near Pullman, Washington.[3][4]Cirsium brevifolium is a perennial herb up to 120 cm (4 feet) tall, with a large taproot. Leaves have spines along the edge. Sometimes there is only one flower head, sometimes a few but not many, with creamy white or pale lavender disc florets but no ray florets.[5] References1. ^The Plant List, Cirsium brevifolium Nutt. {{Taxonbar|from=Q15596262}}{{Cynareae-stub}}2. ^Biota of North America Program 2014 county distribution map 3. ^photo of herbarium specimen at Missouri Botanical Garden, collected near Pullman, Washington, isotype of Cirsium brevifolium 4. ^[https://www.biodiversitylibrary.org/page/370810#page/633/mode/1up Piper, Charles Vancouver 1906. Contributions from the United States National Herbarium 11: 610–611] as Carduus palousensis 5. ^Flora of North America, Palouse thistle, Cirsium brevifolium Nutt. 3 : Cirsium|Flora of the Northwestern United States|Plants described in 1841 |
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