THIS PAGE IS NO LONGER UPDATED AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Up-to-date information about California vascular plants is available from the Jepson eFlora.
Names are linked to treatments from the Manual
Key to AZOLLA
N.B.: couplets are linked, e.g., 1. is linked to 1'.
1. Female sporangium case bumpy, each bump often angled, with a tangle of thread-like filaments; papillae on upper side of upper leaf lobe 1-celled; male spore mass barbs lacking partitions
1' Female sporangium case pitted, with few thread-like filaments; papillae on upper side of upper leaf lobe often 2-celled; male spore mass barbs with several partitions