一 52 — 



The illustration by Holmes I. " is the young form of this plant. 

 Haliseris polypodioides (Desf.) Ag. which is recorded by P. Harlot 

 to have been collected at Yokosuka by Savatier is, I think, this plant, 

 if not H. latiuscula Okam. n. sp. mentioned below ； also I doubt that 

 species mentioned by v. Martens as from Tschifu (Martens _uie Preus. 

 Exped., Tange, iS66, p. 1 13). For, H. polypodioides is not found to 

 prow in this country while the present plant has a wide range of 

 distribution here. 



The affinity of the present plant with IL polypodioides is beyond 

 any doubt, chiefly differing from it by the thicker and more blackish 

 lamina (in dried state) and more robust rachis, not takino" the densely 

 frilled condition of lamina into account. The present species, on the 

 other hand, so much resembles Dictyopteris zonarioides Farlow ms. 

 (Collins, Holden and Setchell's Phycotheca Boreali-Americana No, 

 581) in its colour of frond, its way of ramification and its robustness 

 of the rachis that I doubt whether they are not one and the same 

 species. Heydrich (Ein. Alp". v, den Loo-choo-InseIn in Ber. cler 

 deutsch. bot. gesel XXV, 1907, p. 102) also states that this undeter- 

 mined species of Haliseris from Riu-kiu (which is really a form of 

 the present plant as win be seen below) has a close resemblance with 

 that species. In the system it naturally stand next to h . poly- 

 podioides. . 



Of the present plant there are two forms, the northern and the 

 southern. The northern form is that which has just been described 

 while the southern one (i. e. the plant from Taiwan, Riukiu, Kiushyu, 

 Tsushima, etc.) is not so much undulaied as the northern. Ihe latter, 

 I shall call f、 plana 



- PL. XL. Fig. 1 : Fully grown Haliseris luidtilata Holm, bearln?' 

 く ori， +、 一 Fig. 2 : youncr frond, \. — ricr. 3 : portion of youno- frond 

 ； bearing narrower wings, -ト. 一 Fig. 4 ： portion of the cross-section of 



