Figure 1
From: Crowdfunding the Azolla fern genome project: a grassroots approach
Azolla is a small aquatic fern with an obligate bacterial endosymbiosis. A: hundreds of Azolla individuals can sit in the palm of your hand. B: close-up of an Azolla plant. Photo credit: Mark Smith and Dan Saftner of Macroscopic Solutions. C: Nostoc, symbiotic cyanobacteria (reddish brown filaments) living inside Azolla leaf cavities. Photo credit: Jerald Pinson.