Seeds
Seeds are not abundant in Graissessac, though we did find concentrations at some places. In most cases they are not well enough preserved to identify them at species level. That's why I only mention the genus name.
There were two groups of seedproducing plants: the seed ferns and the cordaits. Most seeds come from the first group.
Codonospermum sp. A more
or less circular seed sometimes showing 8 ribs coming from the middle of
the seed. This seed did possess a body for floating.
Holcospermum sp. Oval
seeds with 8 to 12 ribs on one side.
Trigonocarpus sp. This
is a seed with 3 (sometimes 6) ribs around. In compressed specimens mostly
only 1 of 2 of the ribs are visible.
Carpolithus sp. (no picture). This is a artificial
genus for rounded seeds without clear characteristics. The surface is mostly
smooth but can also show folds.
Samaropsis sp. These
are small seeds with a large wing, which is divided at the top.
Cordaicarpus sp. (no picture). Small seeds with a narrow edge
or wing. Probably from Cordaites.
Click on one of the photo below to proceed.
