Oddsepal Knotweed (Polygonum heterosepalum)
Description
Polygonum heterosepalum, common name dwarf desert knotweed or oddsepal knotweed, is a plant species native to the Great Basin Desert in southwestern Idaho, northern Nevada, northeastern California, and southwestern Oregon. It has been reported from 1 county in California (Modoc), 4 in Nevada (Washoe, Humboldt, Elko and Lander), 4 in Idaho (Owyhee, Twin Falls, Elmore and Gooding), and 5 in Oregon (Lake, Malheur, Harney, Grant and Crook). The species occurs in dry, open sites in sagebrush plains and pine woodlands.Polygonum heterosepalum is a short herb up to 5 centimetres (2.0 in) tall, forming mats that seem rather moss-like. Stems are green or red. Leaves are densely packed, narrow up to 3 millimetres (0.12 in) long. Flowers are white, sometimes pink along margins, borne in groups of 2-3 in the axils of the leaves, slightly zygomorphic with some tepals longer than the others
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Caryophyllales
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Family: Polygonaceae
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Genus: Polygonum
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