00 
BOTANICAL GAZETTE 
[DECEMBER 
— 
488 
le ° 
io @ 
Si 2 
S : 
isk | 
fem @ 
E E| 
— @ 
Pet ey 
= 3 
= Bia 
t => fe? 
= be 
—> ?e 
=f ooh ( ° 
J=ter fal : 
les ok f e 
= ee : 
= Ci ff 
— % 0 me 
=) | s 
=| \ 1 
[2] 
SESES 
c 
zs 
oa a 
Oe ey, tan 
Fic. 2.—A, wood parenchyma fiber of P. 
racemosa with leva simple pits (sp) and 3 small 
bordered pits (bp); also showing tubelike projec- 
tions (¢); 250; B, wood parenchyma fiber of 
P. racemosa with Seotcben pits (6p); also show- es 
ing tubelike projections (¢) often with pit (9); \ 
‘150; C, intermediate fiber of P. occidentalis with oblique 
oval bordered Lay (bp); X1 as D, intermediate form between 
fiber, from wood of P. Wrightii, showing 
slitlike perforations (slp) ctl to those in tracheids, small 
vertical slitlike bordered pits (bp), and oblique simple pits og 
(sp’); eu . wood P. racemosa, showing vertical (ome 
slitlik enlarged to show 
of 
e bordered pits (bp); 100; F, end of wood fiber of P. racemosa 
form of bordered pits (bp); 200; G, forked end of a wood fiber of P. racemosa, X359- 
