BERRY: MESOZOIC FLORA OF ATLANTIC COASTAL PLAIN 397 
plant from Morrison, Colorado. It is a common Dakota group 
form occurring also in the Raritan, Tuscaloosa, and Magothy 
formations of the Atlantic coastal plain. Fragmentary speci- 
mens occur in the collection from Arthurs Bluff, where it was 
also recorded by Knowlton in 1901 (loc. cts 
Rhus redditiformis sp. nov. 
DESCRIPTION: Leaves compound, probably trifoliate. Leaflets 
petiolate, ovate in outline, with bluntly pointed tips, cuneate 
bases, and entire or undulate margins forming occasional distal 
shallow broadly rounded lobules separated by broad shallow 
sinuses. Terminal leaflet nearly equilateral, about 14 larger than 
the lateral leaflets, about 4 cm. in length by 2 cm. in maximum 
width, which is about midway between the apex and the base; 
Petiolule 5 mm. long; midrib stout, prominent; secondaries thin, 
5 or 6 alternate pairs, branching from the midrib at angles of 
about 50°, curving slightly upward, anastomosing close to the 
entire margin. Lateral leaflets inequilateral, the outer limb of 
the lamina being slightly wider and fuller than the inner limb; 
petioles shorter than that of the terminal leaflet, 2-3 mm. in length, 
diverging from the latter at angles of about 70°; in outline and 
nation similar to the terminal leaflet, but smaller and showing 
a tendency to develop slight irregularities in the margin, especially 
toward their tips. (PLATE 31, FIG. 2.) 
This Species is obviously new and is named from its rather 
striking resemblance to the European early Tertiary species Rhus 
reddila Saporta* from Aix in southeastern France. Several Cre- 
taceous species of Rhus have been described from horizons as old 
as the Woodbine, the Dakota group of Kansas furnishing three 
well-marked species with pinnate leaves, one of which Rhus Uddent 
“duereuxf is reported by Ward from the so-called Cheyenne 
Sandstone at Belvidere, Kansas. A small toothed species has 
€n described by Velenovskyt from the Cenomanian sandstone 
of Bohemia as Rhus cretacea, although this name was already in 
se for a very different Cretaceous species described by Heer§ from 
the Senonian of Quedlinburg in Saxony and recorded by Hollick|| 
“om the Upper Cretaceous of Long Island. The Woodbine 
1 saPorta, Etudes 1: 124. pl. 13. f. 2, a, b. 1862. 
onde Mon. U. S. Geol. Surv. 47: Ick. OL 47. fF. 2. 1892. 
tn nevsky, Fl. Béhm. Kreidef. 4: + Ol. 4. ¥. P-¥s: 188s. 
i . de Quedlinburg 14. pl. 3. f. rr. 1872. 
ollick, Mon. U, s. Geol. Surv. 50: 87. pl. 33. f. 2. 1907. 
