On some interesting plants from 

 the island of Formosa. 



By 

 B. H a y a t a. 



Lecturer on Botany, College of Science, Ivilierial University of Tokyo. 



In connection with the Governmental Botanical Survey in 

 Formosa, I made, from Januarj^ to Februar}', a short trip to the 

 island. The excursion was carried on to the Arisan-range where 

 we stayed for twenty days from the basal regions up to the 

 top of the mountains. As botanical trips in these regions were 

 usually made in other seasons of the year, our collections in 

 this time were of very successful ones ; and it will take much 

 time to W'Ork them up thoroughly. In this paper, I shall try 

 to give a few accounts about the most interesting plants of ray 

 materials, which attracted my attention very much. 



First of all, the most remarkable one is Drymotgenium 

 Nakaii Hay.— a peculiar fern to this region of the island. The 

 plant is not very rare in these mountains; but it has remained 

 until now practically unnoticed by several collectors who were 

 sent to these places in different seasons of the year. The plant 

 has a quite similar appearance as Vittaria elongata, so as to 

 be taken for the same plant when seen upward from some dis- 

 tance below. As Drymotsenium is usually found bunging on 

 branches or on a trunk of various Querci or some other trees 

 of a considerable height, as in the case of Vittaria, it is practi- 

 cally impossible to distinguish them from a distance, though the 

 difference is very clear in close examination. The fronds of Dry- 

 motsdnium are fleshy, subterete, dark-green, beautifully shining 

 above, pale whitish beneath, and less curving or sometimes 



