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Obscure progymnosperms
Obscure progymnosperms
This group is represented by two species of Protopitys. These plants are not well known, but they are included as progymnosperms based on the presence of pycnoxylic wood, a bifacial cambium, and spore-bearing reproduction. Nothing is known about the ultimate, photosynthetic appendages.
Ecology & Form
Ecology & Form
Erect shrubs or trees with stems greater than 50 cm in diameter
Stem
Stem
Endarch maturation
Wood is composed of tracheids with circular bordered pits.
Leaves
Leaves
Unknown
Roots
Roots
Diarch (having 2 xylem strands)
Roots lack secondary xylem
Reproduction
Reproduction
Spores: 75-355 μm
Maybe heterosporous due to large range in sizes
Geologic Age
Geologic Age
Diversity
Diversity
Protopitys buchiana †
Protopitys scotica †
Classification
Classification
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