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 appears in 2s or 3s and is  2–5 mm long.  Least Duckweed (Lemna minuta), not pictured, is similar but its plant body comes in 2s and is 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-