new icn messageflickr-free-ic3d pan white
IMG_0708 Azolla mexicana | by Jon. D. Anderson
Back to photostream

IMG_0708 Azolla mexicana

18 May 2016


The red "pond scum" is actually an aquatic fern - Azolla mexicana is a floating plant with blue-green to dark red leaves. It is distinguished from the two other species of the genus present in North America, Azolla caroliniana and Azolla filiculoides, by having multicellular hairs on the leaves and pits on the megaspores.

1 fave
Taken on May 18, 2016