Czekanowskia-like plants from Yorkshire
The plants of this group have their needle-shaped leaves arranged in
bunches like the needles of the fir. Those bunches fell off as a whole. Probably
the plants grew as bushes.
The systematical place of this group is still uncertain. They are considered
as a separate group inside the gymnosperms and they have become extinct.
The
species are generally difficult to distinguish. If all leaves are undivided,
the species is called Solenites vimineus (click on the photo on the
right). This is the most common species.
If forkings
occur, the species belongs to the genus Czekanowskia. Several species
have been described, which differ in the number of times the leaf is forked.
I don't go deeper into this matter. Such a forking is visible on the photo
on the left. So this is Czekanowskia sp. (the indication sp.(= species)
is used when it is impossible to give a species name).
Fructifications of these plants have been found.