THE SEEDLING AND YOUNG PLANT 69 
ness or breadth of the bundles at different points, such 
as where other bundles join or leave them. As the 
fH SH] PAINE REACH 
Rr | $ BNR Naa SOT 
WOU ieeieeee seen 
: Wal rly te seg OOO eS g1s1iiill 
it a AW : oP eH TI 
il i IML Il ene asienssta al 
6) b Cc “igs Cie; z 
| ] : lea OU 
atl Fi it Cty Te CEE O anuiliit 
Bere sell eyeantey enneeeey il 
(Seas il pale eagel ae8 HST OM 
ee Ulliiseazreceel ete: Suetont ot tint 
aT all savaveret), Segbeeec gnaii) 
HP ; Neaeclagal aeeeee. St UII 
ne ay egesBC OO Nanni 
! ile NY H fe nseel I AOReRe! eaniill 
es a ea nea ual 
We: Peels dage|| Pee: cj<ee ee?! 
a | | hag lt Poe on CET 
TINA CH Teer on Mee eon LO ee) eee 
ct TARY zeboeCug Sl DAI HY antl) 
[Pes SoD RAI Ececosegrseall aoe store ani 
ei EATS WOH) 
A Bee celeste CTT i 
i RA OIE Ae nt 
TA ij [OA s=-saseel eee ceeeet ani 
Heh | liege saceualll: semaeeqee gti! 
CRUE eo nT 
44 Soon oor : SARI OC TM 
fates Sarena! III Ke tener OOCCACOres a1, 
TT eeea) saath 
Perec MOebe lili aeceelliceeater | 
| qe tt Bl caeeenes Soo 
Tene TI Mallat li ececeselll: aecuNenses 
‘ A al: 2 3 Seraast wi CR) ag a mill 
mle « at Hh | Y. a. # a 4 2 nr ee 
Fie. 18.—Longitudinal radial section of the cortex and 
phloém of oak. References as in fig. 17. (Luerssen.) 
leaf-trace passes into the venation of the leaf the ends 
become thinner (fig. 21), and the same is found asit tails 
