ite) BOTANICAL GAZETTE [JULY 
preserved. The lignite under discussion obviously is part of an 
old stem. 
Fig. 9 is a radial view of the wood of the Pityoxylon from the 
cliffs at Scituate. This view shows the extremely resinous char- 
acter of the rays, which doubtless is largely responsible for the good 
preservation of the wood, as, unlike the material of Pityoxylon staten- 
ense, it has not been charred in any way by fire. The rays are 
quite without tracheidal marginal cells and in this respect resemble 
those of the first described species, and differ from the ray vege- 
tative structure found in any modern species of Pinus. 
Fig. 10 shows a tangential view of the wood. The rays are 
obviously of two kinds, namely, linear and fusiform. The former 
are often very deep, and in this feature present a marked contrast 
to the first described species of Pityoxylon. The fusiform rays 
are usually occupied by a horizontal resin canal, the lumen of which 
is often filled with a dark brown material similar to that found in 
the surrounding resiniferous cells of the ray. Tyloses have not been 
found either in the horizontal or the vertical resin canals of this species. 
Fig. 11 shows a portion of the same section more highly magni- 
fied. The highly resinous character of the rays can clearly be made 
out. There is one fusiform ray present containing a horizontal — 
resin canal, which is filled with a dark brown material similar to | 
that found in the ray-cells. It may here be stated that in spite of — 
the fact that the cells surrounding the lumina of the horizontal and 
vertical resin ducts cannot be descri 
walled, nevertheless the ducts are never occupied by tyloses. 
Fig. 12 shows another tangential view under considerable magni- : 
e fact that in the rays the marginal as 
tain the same dark brown resin, as has 
the case of the other Cretaceous Pity- : 
The wood is so well preserved that there — 
can be no question as to the absence of marginal tracheids, such — 
fication. This illustrates th 
well as the central cells con 
already been referred to in 
oxylon described above. 
as occur in the rays of living species of Pinus and allied genera. 
Not only are the marginal cells filled with the same dark resinous 
material as the other cells of the tay, but they are related radially 
to each other, as well as to the central cells of the ray, above and 
below by simple pits. 7 
bed accurately as being thick- — 
