Myriophyllum sibiricum

Siberian water-milfoil, Siberian Water-Milfoil

Family: Haloragaceae · Type: perennial · Native

Siberian water-milfoil is a native perennial found in coastal, north coastal, northern Sierra, northern Sierra Nevada, San Francisco Bay, southern coastal, southern California, Santa Barbara, San Bernardino, Peninsular Ranges, Modoc Plateau, and western Mojave Desert regions in ponds, streams, and lakes at elevations below 2,600 meters. Flowering from June to September, this aquatic plant produces tiny white to pink flowers in emergent spikes 3 to 8 centimeters long. Growing with stems over one meter tall that turn white or pink when dry, it forms dense underwater mats with intricate leaf structures. Its submersed leaves are highly dissected, with 28 or fewer linear segments per leaf that vary in angle and spacing throughout the plant's structure. In autumn, the plant produces distinctive cylindrical winter buds at the ends of non-flowering branches, allowing it to survive seasonal changes.

Habitat: Ponds, streams, lakes

Bloom period: Jun-Sep

Elevation: < 2600 m

Bioregions: NCo, NCoRI, CaRH, n SNH, SnFrB, SCoRO, SCo, SnGb, SnBr, PR, MP, w DMoj

California counties: San Mateo, San Bernardino, San Diego, Modoc, Siskiyou, Madera, Del Norte, Humboldt, Santa Clara, San Francisco, Lassen, Shasta, Mendocino, Mono, Inyo, Plumas, Los Angeles, Marin, Santa Barbara, San Luis Obispo, Contra Costa, Sonoma, Placer, Alpine, Sierra, Nevada, Tehama, El Dorado, Alameda, Yolo, Imperial, Napa, Butte, Tuolumne

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.