ON THE T.AMINARIACEAE OF HOKKAIDO 
35 
4. Alaria corrugata Miyahe, sp. nov. 
(Plate 24) 
Japanese name. Chishima-wakame. 
Stipe cylindrical, ca. 7.5cm in length; rhachis ca. 4.5cm in 
length. Sporophylls linear or linear-oblong, slightly curved in the 
shape of a sword, with short petioles, covered completely by sori 
except the apical and marginal portions, 20-30 cm in length, ca. 
3 cm in width. Blade linear-lanceolate, rounded at the base, passing 
abruptly into the rhachis, markedly undulate on the margins, with 
fine transverse corrugations on the surface, rigid, up to 4.6 m in 
length, 30-33 cm in breadth ; midrib solid, oblong in cross section, 
9.9-10.8 mm in width. 
Habitat. Growing along the coasts of Etorofu and Uruppu in 
the Kurile Islands. This species can easily be distinguished from 
the known species by its characteristic shape of the blade base 
and by its possession of fine corrugations on the blade surface. 
So the author describes it here as a new species naming it Alaria 
corrugata.™'’ 
5. Alaria macrophylla Miyahe, sp. nov. 
(Plate 25) 
Japanese name. Kunashiri-wakame. 
Stipe cylindrical, ca. 13 cm in length, a part of the rhachis 
which bears sporophylls measuring only 2.5-3.0cm in length. Sporo- 
phylls remarkably larger in comparison with those of other species, 
23-33 cm in length, 6.6-10.0 cm in width, oblong or oblanceolate or 
linear-oblanceolate, rounded at the apex, somewhat narrowed and 
obliquely rounded at the base, slightly curved on one side, with 
short pedicels, completely covered by sori except along the margin, 
pliant and thin in substance. Blade in the author’s specimen too 
incomplete to make it possible to figure its whole shape, tapering 
gradually at the base, markedly undulate on the margins, with 
33) Yendo (1919) relegated Alaria corrugata MlYABE to a synonym of Alaria 
macroptera (Rupr.) Yendo, stating as follows (p. 82) : “A glance at the original 
specimen of Phasganon macropterum gave me the conviction that A. corrugata 
MlYABE, which is quite familiar to me, is another form which should be amalgamated 
with that species”. Dr. MlYABE agreed with YENDO’s views. ( Cf . MlYAEE and NAGAI, 
1933, p. 99 ; MlYABE in OKAMURA, 1936, p- 297). 
