534 
Bancroft.—A Contribtdion to our 
Text-fig. i. Diagrams of the stele; a series of sections taken through about i inch of an 
a stem, showing the occurrence of the centrarch condition above a place of branching. K 2\k- 
K 21 d represent the larger of the two steles in K 21 in and K 21 /, and show that the two original 
protoxylem groups fuse to form a single endarch strand. In this and other diagrams the xylem is 
shaded, and the protoxylem strands are = indicated by'black dots; a broken line represents a restored 
outline, x 35. (From series K 21, stem B, University College, London.) 
