e 
MARYLAND GEOLOGICAL SURVEY 233 
Family DRUPACEAE. 
Genus PRUNUS Linne. 
PRUNUS ? MERRIAMI Knowlton. 
Plate LX XII, Fig. 2. 
Prunus ? merriami Knowlton, 1902, Bull. U. S. Geol. Survey, No. 204, p. 
Or Dh ai, figs. 3S. 6, 7, 
Description.—There can be no question as to the identity of the Mary- 
land specimen with those figured by Knowlton, but the reference to the 
genus Prunus is more than questionable. It is most likely a Hicoria. 
In fact his P. tufacea (1. c. pl. xi, fig. 4) might well be united with it 
under one species, as representing the lower leaflets, and his Rhus (?) 
sp. (1. . pl. xiv, fig. 6) as representing a terminal one. The identifica- 
tion of the specimens, however, is of more importance from the standpoint 
of stratigraphy than is the correct determination of their botanical 
affinities. 
Occurrence.—SuNDERLAND Formation. Near the headwaters of Is- 
land Creek, Calvert County. 
_ Collections—Maryland Geological Survey. 
Genus CASSIA Linne. 
Cassia sp. ? 
Plate LXXI, Fig. 20. 
Description —This single small leaflet is hardly sufficient upon which 
to base a description of a new species or for making satisfactory compari- 
Sons. It is apparently slightly inequilateral at the base and has some 
resemblance to C. ambigua Ung. (Gen. et Sp. Pl. Foss., p. 492; Syll. 
Pl. Foss., vol. ii, pl. x, fig: 9) and to Leguminosites salicinus Heer (Fl. 
Tert. Helvet. vol. ili, p. 128, pl. exxxix, figs. 28-30), but as the nerva- 
tion is not apparent it has been thought best not to refer it even provis- 
ionally to either of the above species. 
Occurrence.—Sunpertanp Formation. Near the headwaters of Is- 
land Creek, Calvert County 
oe Collections.—Maryland Geological Survey. 
