Potamogetonaceae2017-08-07T16:52:43+00:00

Potamogetonaceae: Pondweed Family

Crisp-leaved Pondweed – Potamogeton crispus

Blooms:

July–Sept

Plant Height:

Stems < 90 cm

Flower Size:

Medium

Origin:

Eurasia

Invasive?

Yes – moderate

Habitat:

Shallow water, ponds

Notes:

This would not merit a place on the website but for the fact that it is rare in Monterey but invasive where it is found.  The leaves are distinctive, 5–8 mm wide, oblong, thick and more or less wavy with clear veins and with rounded tips.

Long-leaved Pondweed – Potamogeton nodosus

Blooms:

May–Aug

Plant Height:

Stems < 300 cm

Flower Size:

Medium

Origin:

Native

Habitat:

Shallow water, lakes, ponds & streams

Notes:

This has leaves of 2 kinds, submersed and floating with subtle differences in size and shape. The floating leaves are 5–10 cm long and < 5 cm wide, elliptic-lanceolate in shape with parallel veins (typical of monocots).  Flowers take the form of a small, decumbent to erect spike.