Araceae: Arum Family
Lesser Duckweed – Lemna minor
Floating on water surface
Ponds and streams
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
< 1 m
Yes – limited
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 CJH.