Fossil Flora from Pagan — Fosberg AND Corwin 
11 
Fig. 9. ? Dianella ensiformis , leaf blades. 
ULMACEAE 
Trema argentea Planch. 
PC-79-11 
A partial leaf impression with palmate and 
net venation so perfectly preserved that there 
is little or no doubt as to its identity with 
Trema argentea. A piece of the opposing part 
of this impression is preserved on PC-79-12 
(Fig. 11). 
This plant, which is often and possibly 
correctly regarded as a variety of Trema orien- 
tals , occurs throughout the Marianas, includ- 
ing Pagan, and north through the Volcano 
and Bonin islands, and with related forms in 
continental Asia. 
It probably may be regarded as one of the 
few northern elements of the flora of the 
Marianas; and the present fossil fairly well 
disposes of the possibility of it being a recent 
introduction in the Marianas. 
Fig. 10. ? Spathoglottis micronesiaca, portion of leaf 
blade showing plication. 
HERNANDIACEAE 
Hernandia sonora L. 
PT-7-1 
A portion of an impression of a leaf blade 
with major veins well shown and with some 
indication of texture. The appearance of a 
firm, stiff texture, palmate venation with veins 
somewhat impressed, and the distance be- 
tween the base and the first branches from 
the midvein strongly suggest this species. It is 
a pantropic lowland or strand tree, common 
in the Marianas and known from Pagan. 
EUPHORBIACEAE 
? Macaranga thompsonii Merr. 
PC-79-12 
A poorly preserved impression of part of a 
leaf showing some major palmate venation. 
