Azolla |
Azolla filiculoides
|
Germany |
Pleistocene |
|
Azolla |
Azolla intertrappea
|
India |
Eocene |
|
Azolla |
Azolla primaeva
|
Canada(British Columbia) |
Oligocene |
|
Azolla |
Azolla pyrenaica
|
France |
Late Pliocene |
Pleistocene |
Azolla |
Azolla tegeliensis
|
Netherlands |
Pleistocene |
|
Azollophyllum |
Azollophyllum primaeva
|
Canada(British Columbia) |
Oligocene |
|
Barrandeina |
Barrandeina dusliana
|
Germany |
Early Givetian |
|
Bennettistemon |
Bennettistemon bursigerum
|
Sweden |
Rhaetian |
Liassic |
Bennettistemon |
Bennettistemon ovatum
|
Greenland |
|
|
Bentzisporites |
Bentzisporites margaritatus
|
Nd |
Nd |
|
Bentzisporites |
Bentzisporites tricollinus
|
Nd |
Nd |
|
Bernettia |
Bernettia phialophora
|
Greenland |
|
|
Biscalitheca |
Biscalitheca musata
|
Illinois |
Late Pennsylvanian |
|
Bothrodendron |
Bothrodendron kiltorkense
|
Nd |
Late Devonian |
|
Bothrostrobus |
Bothrostrobus mundus
|
Nd |
Nd |
|
Botryopteris |
Botryopteris dubia
|
Germany |
Autunian |
|
Botryopteris |
Botryopteris fecunda
|
Iowa |
Pennsylvanian |
|