MATEEIALS FOlî A FLOKA OF FORMOSA. 451 



dimorpliisine, vu (luc los frondes fertiles ont des segments bien 

 plus courts et plus obtus que les steriles. J'ai une plante 

 identique du continent voisin : Sud de la Chine, c. 0. Waeburg." 

 So far as 1 can judge from the note given above, Polystichum 

 dimorphophyllum Hayata mentioned in the present work p. 428, 

 is not to be referable to Christ's variety, for the former has entire- 

 ly dimorphic fronds while the latter looks like a mere form of P. 

 (AspicUum) aristatum which sometimes shows the slightest tendency 

 towards dimorphism. In this, Mr. S. Kodama concurs. So far as 

 I am aware, the description of Christ's variety has never been 

 published. 



Athyrium tozanense H^.YxT\ = Asplenium iozanens'3 Hayata Ma- 

 terials for a Flora of Formosa p. 440. After finishing this 

 manuscript, I have, by the suggestion of Mr. T. Nakai, once moi'e 

 examined the sori of the fern, and have found that there are 

 some indusia which are reflexed backwards at the apex, or on the 

 middk\ It should, therefore, be properly referred to Athyrium. 



Dryopteris quadripinnata HkYA'TK—Microlepin quadripinnata 

 Hayata Materials for a Flora of Formosa, p. 434. As is suggested 

 by Mr. T. Nakai, the indusia of the fern are cordate, affixed to 

 the receptacles and quite free on the margin. It should, therefore, 

 be properly transferred to Drijopterh from Microlepia to which it 

 was erroneouslv referred. 



