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order Plumbaginales
order Podicipediformes
order Podicipitiformes
order Polemoniales
order Polygonales
order Polymastigina
order Polypodiales
order Primates
order Primulales
order Proboscidea
order Procellariiformes
order Proteales
order Protura
order Pseudomonadales
order Pseudoscorpiones
order Pseudoscorpionida
-- order Psilophytales --
order Psilotales
order Psittaciformes
order Psocoptera
order Pterosauria
order Pulmonata
order Pycnogonida
order Radiolaria
order Rajiformes
order Ranales
order Ranunculales
order Raptores
order Rhamnales
order Rheiformes
order Rhoeadales
order Rhynchocephalia
order Rickettsiales
order Psilophytales
Noun
1.
order Psilophytales
-
Paleozoic
simple
dichotomously
branched
plants
of
Europe
and
eastern
Canada
including
the
oldest
known
vascular
land
plants
Synonyms:
Psilophytales
division
Pteridophyta
,
family
Psilophytaceae
,
family
Rhyniaceae
,
plant
order
,
Psilophytaceae
,
Psilophytales
,
psilophyte
,
Pteridophyta
,
Rhyniaceae
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