Connections
plant
Entity
evolution
Entity
leaf
Entity
fossil
Entity
digital object identifier
Entity
Gymnospermae
Entity
Equisetum
Entity
Q180686
Entity
JSTOR
Organization
bibcode
Entity
homology
Entity
living fossil
Entity
plant anatomy
Entity
Lycopodiopsida
Entity
Isoetes
Entity
Lepidodendron
Entity
stele
Entity
Psilotum
Entity
Rhyniopsida
Entity
Asteroxylon
Entity