Flora Desmidiarum Japonicarum IV

182• Minoru HrRANo : Flora Desmidiarum Japonicarurn
var. granulusculum but is different trom it by larger size of semicell and
well granulated cell wall. This species is widely distributed in marshes
and ponds.
Cosmarium BotrytiS MENEGH. in Roy & BissET journ. Bot. 24, 194, 1886; WEsT
Monogr. Brit. Desm. 4, 1, 1911; SMITH Wisc• Bull. 57, 33, 1924; OKADA Journ. Imp. Fish.
Inst. 30, 163, 1934; TAyLoR Pap. Mich. Acad. Sci. 19, 251, 1934; INsAM & KRIEGER Hedw.
76, 97, 1937; OKADA Inkwa 169, 1939; TAFT Ohio Journ. Sci. 45, 192, 1945.
Cellulae mediocres vel maiores, leviter longiores quam latiores, profunde
constrictae, sinu angusto-lineari in capite leviter dilatato; semicellulae
angulari-pyramidatae, angulis basalibus late rotundis, marginibus lateralibus
convexis, apicibus angustis truncatis et rectis vel leviter convexis; membrana
regulariter et aequaliter granulata, granulis parum in serie concentricis ad
marginem, sed prope centrum irregularibus; a latere visae ellipticae; a
vertice visae ellipticae. Long. 56-59pa, Lat. 50-54pa, Lat. isth. 14-18pt.
A
Hab. Kiushiu: Ahira in Osumi. (Pl. XXVII, f. 13)
Distr. Japan, Kuriles, Manchuria, China, Siberia, Mongolia, Ceylon, Pamir,
Asia Minor, Europe, Greenland, Spitzbergen, Nova Zembla, N. & S. America,
New Zealand, S. Africa, Azores.
var. depressum W. & G. S. WEsT in Monogr. Brit. Desm. 4, 7, 1911.
Cellulae breviores, circiter leJ duplo longiores quam latiores ; semicellulae
depressae, angulis basalibus latissime rotundis, angulis apicalibus obtusis.
Long. 67pa, Lat. 56pa, Lat. isth. 14fo.
Hab. Hondo: H6zawa-ike in Iwashiro. (New to Asia) (Pl. XXVII, f. 12)
Distr. British Isles.
var. subtumidum WITTR. in WEsT Monogr. Brit. Desm. 4, 4, 1911.
Cellulae latiores, granulis cum centrali tumore Ieviter maiores quam in
ceteris. Long. 56pa, Lat. 51pa, Lat. isth. 14pa.
Hab. Hondo: Rokujizo in Yamashiro. (New to Asia) (Pl. XXVII, f. 25)
Distr. Siberia, Europe, Greenland, Canada.
Cosmarium Raciborskii LAGERH. inJoHrysoN Bull. Torrey Bot. Club 22, 294,1895;
MIGul.A Krypt. Fl. 2, 449, 1907; HoMFEI.D Pflanzenf. 12, 53, 1929 ; SKuJA Act. Horti BoL Univ,
Latv. 4, 64, 1929 ; INsAM & KRIEGER Hedw. 76, 107. 1937.
Cellulae submediocres, circiter tam longae quam latae vel leviter latiores
quam longiores, profunde constrictae, sinu angusto-lineari vel acuto aperto et
extremo ampliato, extrorsum aperto; semicellulae rhomboido-subtrapeziformes,
marginibus lateralibus inferioribus convexis et divergentibus, marginibus
lateralibus superioribus convergentibus et rectis vel convexis, apice angusto-