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IV.—Some Specimens of Protoclepsydropsis and Clepsydropsis from the Calciferous Sandstone Series of Berwickshire

Published online by Cambridge University Press:  06 July 2012

Albert G. Long
Albert G. Long
Affiliation:
Hancock Museum, Newcastle-upon-Tyne.
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Synopsis

Protoclepsydropsis kidstoni (Bertrand) Hirmer is a small fossil fern with a slender stem about 3 mm. diameter bearing petioles of a Clepsydropsis type in a ⅖ phyllotaxy.

Larger isolated Clepsydropsis petioles from the same rocks probably belong to a larger related plant. In these the petiolar bundle is sometimes oval in cross section with protoxylem groups nearer one tangential surface. Occasionally roots are borne on these petioles. A resemblance to the petioles of Asterochlœna laxa Stenzel is pointed out.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 67 , Issue 4 , 1967 , pp. 95 - 107
Copyright
Copyright © Royal Society of Edinburgh 1967

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