[326] As Miss Stokey (09) points out the production of parenchyma internal
to the cambium of L. fuliginosum is a feature shared by Isoetes. See also Scott
and Hill (00), p. 424.
[327] Williamson (81) A. Pl. LII. p. 288. (Will. Coll. No. 379.)
[359] The term meristematic zone is used because some of the cells in this
region are in a state of active division, though the inner portion may consist
of permanent tissue.
[381] Scott [(08) p. 187] suggests that the projection may have formed a passage
for the admission of the microspores, or of the spermatozoids which they produced.
[382] Bennie and Kidston (88) Pl. VI. figs. 20, a–s.