Myriophyllum sibiricum (Northern Water-milfoil) - photos and description




Male flowers at top of spike, female flowers below

Female flowers growing in whorls in above photo



Leaves pulled from stem leaving one leaf to photograph

General: Aquatic perennial with submerged, leafy stems. Plants rhizomatous.

Flowers: Flowers grow in a terminal spike, with male flowers at the top of the spike, female flowers below. Female flowers are white, with 4 petals, petals fringed. We measured a female flower at 2 mm diameter and 3 mm long. A bract subtends each flower, we measured a bract growing under a female flower at 3 mm long.

Leaves: Leaves in whorls, have an ovate outline, pinnately divided into thread-like segments, we counted 9 segments on each side of the rachis.

Height: We measured the flowering stem extending 4-6 cm above the water.

Habitat: Lakes, ponds, sloughs, and slow moving streams.

Abundance: Common.

Origin: Native.

When and where photographed: Photos taken July 31st in a shallow pond, boreal forest about 450 km northeast of our home in Regina, SK.