-
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 more
closely related to seed
plants than...
-
group known as the
progymnosperms.
These early seed
plants ranged from
trees to small,
rambling shrubs; like most
early progymnosperms, they were woody...
-
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 (paraphyletic) ****tophytes...
-
forests of
primitive plants existed: lycophytes, horsetails, ferns, and
progymnosperms evolved. Most of
these plants had true
roots and leaves, and many were...
- the clubmosses, the
ferns including the
arborescent horsetails, and
progymnosperms. This
occurred as part of the
process of
evolution of the
timing of...
-
Devonian period,
several groups,
including the lycopods,
sphenophylls and
progymnosperms, had
independently evolved "megaspory" –
their spores were of two distinct...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
