Polygonum davisiae
| Polygonum davisiae | |
|---|---|
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| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Core eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Genus: | Polygonum |
| Species: | P. davisiae |
| Binomial name | |
| Polygonum davisiae W.H.Brewer ex A.Gray |
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| Synonyms | |
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Aconogonon davisiae |
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Polygonum davisiae is a species of flowering plant in the knotweed family known by the common name Davis' knotweed.
[edit] Distribution
It is native to the western United States from Washington and Idaho to the Sierra Nevada, where it grows in high mountain habitat, such as talus and fellfields.
[edit] Description
Polygonum davisiae is a perennial herb producing a decumbent or upright stem from a woody caudex, growing to a maximum erect height near 40 centimeters. The leaves are oval and pointed or widely-lance-shaped to somewhat triangular, yellowish or pale green and waxy, slightly hairy, or smooth in texture. At the base of each leaf is a thin reddish sheath formed from the leaf's stipules which is known as the ochrea.
Flowers occur in clusters of 2 to 5 in the leaf axils. The flowers are yellowish, greenish, or purple-tinged and just a few millimeters wide.
[edit] External links
- Jepson Manual Treatment - Polygonum davisiae
- USDA Plants Profile; Polygonum davisiae
- Flora of North America
- Polygonum davisiae - Photo gallery
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