MEDULLARY RAYS. 227 
Sse 
Ore EAS Ne 
A fT |S 
tet 
oe 
Vee 
<a 
Ke 
EEL 
a Ct 1 
Arter e 
ve 
a) 
De 
S 
‘ mes = 
Seses; ee" 
SILK 
eK | 
“ue 
a4 
Fie. 145.—Transverse section through phloém portion of the bark of Cinchone 
lancifolia ; r, primary medullary rays; s, secondary medullary rays; q, stone-cells; p,. 
bast cells (Berg), 
