Our plant seems to differ from the typical one in not having 

 the midrib and basal stem-like portion. Habit, texture and mode 

 of branching are very similar to PI. abnorme H. et H. (PI. CI of 

 the present Icones), only differing in having serrated margin on 

 the outer side of the simple lacina of geminate ones. The plant 

 now in consideration may probably be a form which grows on 

 the northernmost limit of the distribution of the present species 

 and as consequence having much smaller size, thin, fine and 

 membranaceous texture, and the midrib invisible or not manifest. 

 A hybrid of PL abnorme and PL costatuni ? 



PI. CXCVIII, fig. 1-4. Fig. 1 : frond of Plocaminm costatum 

 H. et H., -i-. Fig. 2 : upper portion of branch, ~. Fig. 3 : 

 sporophylls, **-. Fig. 4 : sporophyll ; b, pedicel, ^. 







Dasyphila plumarioides Yendo. 



Nom. Jap. : Okisltinobu. 



PL. CXCVIII, Fig. s-i i. 



Dasyphila plumarioides Yendo Nov. Alg. Jap. Decas I-III 

 (Bot. Mag. Tokyo Vol. 34, p. 7, 1920). 



Frond filiform, little thickening below to subcylindrical stem, 

 gradually compressed upward, irregularly alternately decompound 

 with patent branches, expanding in a subflabellate manner. 

 Branches are loaded with elegant pinnae (k,k in fig. 10-11). 

 Pinnae which arise in opposite manner sooner or later make 

 limited growth and are callithamnioid that is consist of single row 

 of cells. They are alternately pinnulated with pinnulae arising 

 from every articulation of the rachis. One of pinnae standing 

 opposite may grow up into branch (/,/ in fig. 10-11) and branch 

 usually arises from every second node (i.e., intervening a pair of 



