296 OLDER MESOZOIC FLORAS OF UNITED STATES. 
distinctly, but they appear to have the character of those of Podoza- 
mites. The leaflets are widest not far above their bases, and grow 
narrower very slowly toward their tips. They end ina lancet-shaped 
tip. At their bases they are abruptly narrowed and rounded into a 
very short petiole, by which they are inserted on the midrib. They 
are then in general shape linear. Pl. XL gives the specimen with 
the largest ones seen, and these have probably the maximum size 
attained. In this specimen the tips of none of the leaflets are pre- 
served, but enough is shown to indicate that they were a little more 
than 7 cm. long. Their maximum width is 6 mm. The insertion of 
the leaflets on the midrib is mostly on the side. In some the insertion 
seems to be on the upper face of the midrib and slightly within its 
margins. Possibly this appearance may be due to pressure, which 
has caused the bases to slip over on the upper face of the midrib. 
The insertion is made by what does not seem to be a true petiole, but 
rather a much narrowed and thickened portion of the base. Pl. XLI 
shows a form that is the terminal portion of a leaf, and it is appar- 
ently the terminal part of the leaf the lower portion of which is rep- 
resented on Pl. XL. Here the leaflets grow smaller and shorter and 
are set on more and more obliquely. This part of the leaf seems to 
end with a leaflet lying in the direction of the prolongation of the 
midrib. 
As shown by the specimens collected by Emmons, there are in the 
Older Mesozoic strata of North Carolina at least two species of this 
type of plant. Emmons detected this fact. He described the form 
with larger leaflets in American Geology, Pt. VI, p. 116, pl. iii, fig. 7, 
calling it Podozamites lanceolatus. As it is not the P. lanceolatus 
of the Jurassic, Dr. Newberry suggested that it be named P. Hm- 
monsii. Emmons’s figure of it is not very good. It is clearly a dif- 
ferent species from P. longifolius. I found a plant in the Older 
Mesozoic of Virginia of the same type with Emmons’s species, and 
with some hesitation identified it with the latter,’ from oversight, not 
crediting Dr. Newberry with suggesting the specific name Hmmonsii. 
Since I have had the opportunity to examine Emmons’s specimens Iam 
satisfied that the Virginia fossil is not the same as the larger form, 
which must retain the name Emmonsti, but is P. longtfolius. There is 
a marked resemblance between this type of plant and the genus Nagei- 
opsis of the Younger Mesozoic of the Potomac formation. I am 
inclined to the opinion that such plants as Podozamites Emmonsii, P. 
longi folius, and P. tenuistriatus are not cycads, but conifers allied to the 
Nageia section of Podocarpus, and perhaps ancestral forms of Nagei- 
opsis. Of course, until they show branching forms, or some other 
feature not belonging to the cycads, they must be left in the old 
group of Podozamites. 
1Mon. U.S. Geol. Survey, Vol. VI, pp. 77, 78, pl. xxxiii, fig. 2. 
