Stems 15–100 mm. Rhizomes 1 mm diam. Leaves on mid portions of emergent shoots in whorls of 5–7, linear, 2–10 × 0.2–0.5 mm, midvein often conspicuous, lateral-veins absent, ape× acute, tip translucent, callous, not curled in dried plants. Flowers unisexual, staminate in leaf whorls proximal to pistillate; filaments longer than anthers. Drupes 1.2 × 1 mm. 2n = 16.

Phenology: Flowering summer.
Habitat: Shallow streams, stream banks, bogs, seeps, upper montane and alpine zones.
Elevation: 100–1400 m.

Distribution

• Generated Map
• Legacy Map

Alta., B.C., N.W.T., Yukon, Alaska, Wash.

Discussion

Hippuris montana differs from other species of Hippuris by its diminutive size and the tendency for the plants to be woven into the moss carpet; it is probably often overlooked by collectors.

The single occurrence reported by N. N. Tzvelev (1980) in the Russian Far East (lower Amur River) of an otherwise North American endemic has not been confirmed.

Selected References

None.

Lower Taxa

None.