BLOMQUIST—ANGIOPTERIS 
; Fic. 5.—Diagrams of sections of stele, showing course of different vascular 
components after appearance of medullary strand (only xylem shown); sections not 
successive: r, root stele; /, leaf trace; ms, Pate strand; c, commissural strand; 
mc, mucilage canal; dotted lines with arrows indicate origin; a — courses 
of leaf traces, commissural strands, and medullary strand; 
