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THE BOTANICAL MAGAZINE. 



[Vol. XXXV. JJo. 416. 



arranged closely or loosely in Vs clockwise manner. The stelar con- 

 struction is different from the preceding. Though the gaps are 

 arranged in three rows, two neighouring gaps in one and the same 

 row are discrepant. Consequently, the strand sejoarating the two 

 gaps becomes oblique ; the orientation of the strand being constantly 

 counterclockwise, that is, running across from below the right to 

 above the left in the diagram (Fig. 3, A). This tendency was 

 observed in Athyrium nipponicum 

 in exceptional cases, but it oc- 

 cures definitely inthis species. The 

 number of meristeles in a cross 

 section is three or four. Foliar 

 traces, two in number depart 

 from the margin of a gap to 

 ward the end of the commissual 

 strand in the next row (Fig. 3, 

 A; marked with x). 



Dryopteris japonica (Bak.) 

 Chr. Creeping rhizome with 

 loosely arranged leaves. The con- 

 struction of the stele and foliar 

 traces arc as in the foregoing 

 species. 



Dryopteris gracilescens (Bl.) 

 KzE. var. abbreviatum Kod. Obli- 

 que rhizome with crowded leaves. 

 Stelar construction is as in the above mentioned species. 



Diplazium laticeum (Th.) Pr. Slender creeping rhizome with long 

 internodes. Stelar construction is similar to the preceding, only 

 differing in that the departing points of traces are slightly posterior 

 (Fig. 3, A ; marked with A). 



Dryopteris sophoroides (Th) Kze. Typical creeping rhizome 

 with very long internodes, even as long as 10 cm.. The stelar con- 

 struction, however, is quite the same with the preceding species, only 

 differing in that the two traces depart nearly at the end of the gap 

 (Fig. 3, A ; marked with O). 



Diplazium japonicum (Th.) Bedd. Creeping rhizome with leaves 

 arranged loosely in Ys counterclockwise manner. The stelar construc- 

 tion is quite contrariwise to the precedings, the oblique commissure 

 running across clock wisely or from above the right to below the left. 



Fig. III. Developing figures of 

 steles with oblique commissure, the 

 phyllotaxy being -1^ clockwise (A) or 

 counterclockwise (B). Tbe departing 

 points of foliar traces are also mark- 

 ed (details in text). 



