[PENHALLOW] A REPORT ON FOSSIL PLANTS 291 
are known through their wood and have been derived from the Pleisto- 
cene, but Knowlton (33) has described a species from Kukak Bay, 
Alaska, under the name of P. harrimani. This is the only North 
‘American species which has so far been recognized through its cones 
only, and an inspection of the figures given shows it to be of a totally 
different type, approximating, according to Dr. Knowlton, to the exist- 
ing Alaska spruce — P. sitchensis. The age of this tree is given as 
Upper Eocene. 
250 1007 
Tb. & 3b, 4, 6b. 
This species is one of those problematical forms, concerning which 
it seems extremely difficult to obtain sufficiently comprehensive data 
to admit of a fully reliable diagnosis which will establish its character 
beyond doubt. All the specimens so far figured,, represent fragments 
only, and so poorly preserved as to make adequate description impos- 
sible. So far as may be judged from the figures given at various 
times, as well as the material which has passed through my hands, the 
leaf seems to have been a somewhat delicate one, in consequence of 
which the essential characters have been but poorly preserved. That 
it was a monocotyledon of some sort is quite evident, but it will not 
be possible to place it more exactly until more perfect material is found, 
and the name commonly assigned on the basis of Lesquereux’s original 
determination must be viewed as wholly provisional. 
As presented to us in the present collections, this plant appears 
from two different localities, although representing the same geological 
horizon — 250 and 1007. The specimens show the plant in somewhat 
different conditions of preservation, but with a certain constancy of 
characters which permit of coordination. They are always more or less 
distinctly rugose, sometimes also with transverse wrinkles. They some- 
times appear without any evidence of venation, while in other instances 
they show a pronounced indication of a strong, central nerve or midrib. 
They are among the forms which are entirely new to the region under 
consideration, but they are recognized components of the Green River 
Group of Randolph’s County, Coiorado (42). 
The specimens now in hand are fragments 8-9 an. long and 2.6 
em. wide; much altered by decay, but showing imperfectly, a rather 
fine, parallel venation and marked evidences of a strong, central mid- 
rib which, however, is not infrequently wanting in the narrower speci- 
mens. There is also, frequently, a strong transverse wrinkling due 
to longitudinal displacement. 
of 1905 CYPERACITES HAYDENII, Lesq. 
