358 OLDER MESOZOIC FLORAS OF UNITED STATES. 
out their length. The maximum length seen was 13 cm. ‘The leaflets 
go off at an angle of about 60°, and then turn slightly away from the 
midrib. Their width is somewhat variable. The average width is 2 
em. and the maximum 38cm. The nerves are fine, but distinct and 
very numerous. They go off at an angle of 45°, and immediately 
after leaving the midrib turn strongly away from it, and then are 
parallel throughout their course. They fork once near their bases. 
No additional forking was certainly made out. If it takes place it 
must occur at long intervals and irregularly. 
Several specimens of this splendid plant were found at the locality 
“Tn the bed of a ravine that leads from the Banner mine,” etc. PI. 
LIX gives the most complete form and Pl. LX that with the widest 
leaflets. A few fragments of leaflets of this species are also seen on 
Pl. LXVII, Fig. 5. 
This fine plant is one of several species found at the Oroville locality 
which are evidently allied and probably belong to the same genus. 
The genus Ctenophyllum, as defined by Schimper, seems to be the one 
in which they must be placed; that is, provided we may translate his 
description, ‘‘foliolis lateri rachis superiori, oblique adfixis,” by: leaf- 
lets attached obliquely to the upper side (not face) of the rachis. The 
leaflets are attached obliquely to the sides of the rachis in the plane of 
the upper face of thesame. It must be admitted that these plants are 
of a very different type from Ctenophyllum Braunianum, so far as 
their general aspect is concerned. 
The plant now in question is nearer (. lat¢foliwm Font.' of the Poto- 
mac of Virginia than any other hitherto known, but the leaflets do not 
vary so much in width and‘the nerves are more slender and closely 
placed. 
The plant is named for Mr. Lester F. Ward, by whose efforts the 
fine collection from Oroville was obtained. 
CTENOPHYLLUM DENSIFOLIUM Fontaine. 
Pl. LXI. 
1896. Clenophyllum densifolium Font.: Am. Jour. Sci., 4th Ser., Vol. II, p. 274. 
The size of the leaf is unknown, as all the specimens were fragments. 
The most complete portion found is a fragment of a compound leaf, 
29cm. long, from the middle part. This indicates that the plant must 
have been very large. It is apparently the largest Ctenophyllum 
occurring at Oroville. It shows a number of leaflets on a side, the 
largest of which, with the upper portion of it not preserved, is 13 em. 
long. Notwithstanding the considerable size of this specimen, it shows 
no diminution from base to summit in the size of the midrib and of 
1Mon. U.S. Geol. Survey, Vol. XV p. 175, pl. Ixviii, figs. 2, 3. 
