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SVENSK BOTANISK TIDSKRIFT. 1920. Bp. 14, H. 2—3.
PSILOPHYTON’ (?) "HEDET N7SP) PROBATE am
LAND-PLANT, FROM THE SILURIAN OF
GOTHLAND.
BY
ERG HACE:
With 1 plate.
In the summer of 1918, Dr. J. E. HEDE of the Swedish Geolo-
gical Survey discovered, in the Silurian of Gothland, a fossil which
seems to represent the remains of a land-plant. In view of the
attention which the earliest land-flora has received lately, this
fossil appears to be of some interest, chiefly on account of its
geological age. We now know a number of well characterized
plants from the Lower Devonian: our knowledge of some of the
most important forms, described by Kipston and LANG, is, indeed,
unusually complete. The supposed land-plants described from the
Silurian, on the other hand, are either very doubtful or else their
geological age is far from settled. It is not intended here to
discuss any of these doubtful records of Silurian land-plants but
only to describe the fossil now found in the island of Gothland.
The single specimen known was found by Dr. HEDE — who has
kindly communicated the geological data given here — a short
distance SE of Petesviken in the parish of Hablingbo. The rock isa
fairly soft, slightly calcareous gray shale containing only a little
mica and arenaceous material. In the same bed were found,
among other marine fossils, two species of graptolites: Monograptus
chimaera Barr. and M. Nilssoni Barr. Chiefly on account of these
species, Dr. HEDE regards the bed as belonging to the Lower
Ludlow (Upper Salopian).
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