-
another group of
progymnosperms gave rise to the
first really large trees known as Archaeopteris. The
latest surviving group of
progymnosperms is the Noeggerathiales...
-
characteristics of
woody trees and
herbaceous ferns, and
belongs to the
progymnosperms, a
group of
extinct plants with gymnosperm-like wood but that produce...
- the clubmosses, the
ferns including the
arborescent horsetails, and
progymnosperms. This
occurred as part of the
process of
evolution of the
timing of...
- †
Progymnosperms (paraphyletic) ****tophytes...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
-
Devonian period,
several groups,
including the lycopods,
sphenophylls and
progymnosperms, had
independently evolved "megaspory" –
their spores were of two distinct...
-
years ago.
Early characteristics of seed
plants are
evident in
fossil progymnosperms of the late
Devonian period around 383
million years ago. It has been...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
-
previously linked to
horsetails and ferns, but are
currently believed to be
progymnosperms,
being woody like seed plants, but
still producing spores rather than...
