1922] BLOMQUIST—ANGIOPTERIS 187 
Fic. 3.—Diagrams of sections of stele, showing stele development up to third 
leaf (only xylem shown); sections not successive: f1, 72, 3, 4, first, second third, and 
fourth root traces; /,, 1, /;, first, second, and third leaf traces; cs;, first commissural 
strand; 176. 
Fic. 4.—Diagrams of sections of stele, commencing slightly below where first 
medullary strand appears (only xylem shown); sections not successive: rt, root stele; 
¢s, commissural strand; /t, leaf trace; mc, mucilage canal; ms, first medullary strand; 
X8o. 
