(Sawatch Knotweed)
Polygonum sawatchense ssp. sawatchense, Lathrop State Park, Huerfano Co. 7476
Polygonum sawatchense ssp. sawatchense, Lathrop State Park, Huerfano Co. 7482
Polygonum sawatchense ssp. sawatchense, Lathrop State Park, Huerfano Co. 7488
Polygonum sawatchense ssp. sawatchense, Lathrop State Park, Huerfano Co. 7490
| Scientific Name | Polygonum sawatchense ssp. sawatchense (Polygonum douglasii ssp. johnstonii) |
USDA PLANTS Symbol | PODOJ |
| Common Name | Sawatch Knotweed | ITIS Taxonomic Serial No. | 823868 |
| Family | Polygonaceae (Buckwheat) | SEINet Reference |
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| Description |
Life zones and habitat: Foothills to subalpine (5500 to 11500 ft.); dry, sany or gravelly soils in meadows, pastures, sagebrush areas and woodlands. Plant: Erect annual up to 20 inches tall; jointed, slender stems, simple or branching from the base, green to brownish. Leaves: Alternate, narrow linear to oblong or oblanceolate blades to nearly 2 inches long, the upper leaves much smaller, 1/3-inch or so long; margins are entire. Inflorescence: Small flowers, single or in clusters of 2 to 4, borne in the leaf axils; blossoms have 4 ot 5 tepals that are whitish with green or brownish veins; 3 to 8 stamens. Bloom Period: June to August. References: "Flora of Colorado" by Jennifer Ackerfield, Vascular plants of the Gila Wilderness and SEINet. |
BONAP Distribution Map P. swatchense Map Color Key |
Colorado Status: Native |
© Tom Lebsack 2024
Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains