288 T. Nakai. : 
spective ratio is weeker than in Apanson’s Dryopteris. The delegates of 
the Brussels’ congress have suggested to use Nephrodiwm instead of Dry- 
opteris, but Dryopteris is more practical than Nephrodium at present, 
‘by the help of Caristensen’s Index Filicum. 
One can not overlook the farther-going discussion on Dryopteris done 
by Mr. GC. A. Weatnersy in Rhodora (October 1919). His opinion is that 
CG. C. Scumipex’s Thelypteris in Icones Plantarum ed. 2. (1762) p. 45, PI. 10 
and 13 is an earlier valid name of Dryopteris. One must notice, at first, 
that Scumrpet has described it botanically distinguishing genera and Species, 
His figures are so nice as no one can mistake with other species than 
Dryopteris Thelypteris, but no generic characteristic has been given to 
that. Explicatio figurarum suffixed is the explanation of the figures of Dry- 
opteris Thelypteris which is designated by him as »Thelypteris palustris 
non ramosa«. So his Thelypteris is not’ a generic name. It is a vague 
significance of a group of plant. His species also can not be adopted by 
recent botany. Hic’s Filix has the generic descriptions, so it is botani- 
cally better than Thelypteris of Scaminez. | 
Preceeding to Mr. Wearnersy’s discussion, Mr. Woynar has given a 
note under the title of “Zur Nomenklatur einiger Farngattungen II. Filix’ in 
‘Hedwigia’ Vol. LVI. (1915) p. 381—387, in which he explained why Thely- 
pteris of Scaminez should not be considered as a generic name. Messers 
H. Scamz and A. Tuerzung had also the same view as Mr. H. Woynar 
(see Vierteljahresschrift der Naturforschenden Gesellschaft in Zürich LXVI, 
[4921]). 
Aspidium is used to express the second group. This genus was de- 
scribed by O. Swartz in 1801, and contains 70 species; i. e. 30 Dryopteris, 
15 Polystichum, 6 Ci bbe. is, 6 Nephrolepis, 4 Athyrium, 3 Aspidium, 
2 Oleandra, 1 Hemitelia, 1 Asplenium, 1 Cyclopeltis , ana 1 Didymo- 
chlaena. The number of Aspidium is only three as to the number of 
Dryopteris thirty. So, Aspidiwm should be pertained in Dryopteris. The 
best name to denote ne second group is Bathmium which was used by 
Link in his “Filicum species in Horto regio botanico Berolinensi cultae’ 
in 4841. 
Polystichum denotes the third group, now. The genus was published 
by Rorn, both in 1799 and 1800. It involves the following species. 
Polystichum Lonchitis oO 
> Phegopteris Dryopteris Phegopteris 
montanum > Oreopteris 
Thelypteris > Thelypteris 
» aculeatum O. K. 
» Dryopteris Dryopteris Linnaeana 
Pilix-mas » Filix-mas 
