LEAVES OF ARCHAEOSIGILLARIA VANUXEMII,A DEVONIAN LYCOPOD FROM NEW YORK

The leaf of mid Devonian Archaeosigillaria vanuxemii from Gilboa, N.Y. is known to have a thick conical base. This study demonstrates by the uncovering technique the attachment of leaves to the stem, the flattened lamina that is deltoid in outline with a toothed margin, and an apex prolonged into a hair. Comparisons are made with specimens from Kazakhstan. The morphology of leaves of other species of Archaeosigillaria and the slowly accumulating data on leaves of Devonian lycopods are discussed.