Araceae: Arum Family

Lesser Duckweed – Lemna minor

Blooms:

n/a

Plant Height:

Floating on water surface

Origin:

Native

Habitat:

Ponds and streams

Notes:

Very common form of pondweed, this is pale to dark green.  The plant body is not differentiated into stems and leaves.  In this form the elliptic-obovate plant body occurs in clumps of 2 or 3 together, and is 2–5 mm long.  Least Duckweed (Lemna minuta), not pictured, is similar but its plant body comes in pairs, and is only 1–2.5 mm long.

Calla-lily – Zantedeschia aethiopica

Blooms:

Mar–May

Plant Height:

< 1 m

Flower Size:

Large

Origin:

South Africa

Invasive?

Yes – limited

Habitat:

Moist places

Notes:

This is a dramatic flower with a broad, curved white spathe, surrounding the short yellow spike (which is the actual flower).  Widely cultivated, occasionally escaping and naturalizing.  In summer heat, the leaves wither and a cluster of green fruits ripens to bright red.  Photo #4 by Cliff Halverson.

Lily, Calla-