Flora Desmidiarum Japonicarum IV

168 Minoru HIRANO: Flora Desmidiarum Japonicarum
A
Imuta-ike in Satsuma; Koshiki-ike, Byakushi-ike, Ohatayama of Mt.
Kirishima in Hiuga. (Pl. XXVI, f. 2)
Distr. Japan. Kuriles, Java, Ceylon, Europe, Greenland, Australia, New
Zealand.
I have not yet seen this typical species in our country but is recorded
formerly by FuJisAwA from Yashima-ike of Mt. Kirigamine but his figure
well corresponds to the forma hgxasticha. This form is widely distributed
in the sPh2gnum moor of the alpine and subalpine regions and in the
marshes of lowland, but is rather rare and is confined to moor-bogs or
dystrophic waters in western and southern Japan.
Cosmarium monomazum LUND. var. amazum RACIB. in Wydz. Akad. Um.
Krakow 10, 16, 1889 (reprint).-var. glabram HINoDE in Hikobia 1, 149, 1952.
Var. semicellulae sine inflatione et glabrae ad medium; verrucis marginibus
circa 16-20; a vertice visae hexagono-ellipticae, polis truncatis.
Long. 30-31pa, Lat. 30-31pa, Lat. isth. 11fo.
Hab. Hokkaido: Kiritappu in Kushiro; Toyokoro-konuma in Tokachi;
Sarufutsu in Kitami; Tomakomai, Yafutsu, T6asa-numa, Benten-numa in
Iburi; Shizukari in Oshima. (PL XXVI. f. 20, 21)
Distr. Japan, Poland.
Cosmarium caelatum RALFS in Brit. Desm. 103, 1848; MIGul.A Krypt• Fl. 2, 468,
1907; WEsT Monogr. Brit. Desrn. 3, 134, 1908; KRIEGER Hedw. 70, 145, 1930; TAyLoR Pap.
Mich. Acad. Sci. 19, 251, 1934; HIRANO Act. Phytotax. Geobot. 12, 84, 1943.
Cellulae submediocres, ellipticae, leviter longiores quam latiores, profunde
constrictae, sinu angusto-lineari in capite subampliato; semicellulae subsemicirculares,
marginibus valide crenatis, crenis lateralibus binis et ferne
ulterius bicrenatis, 4 crenis lateralibus minoribus, apicibus 4-crenatis (minoribus
quam in lateribus), crenis omnibus cum granulis duobus ad marginem
(crenis inferioribus aliquando cum granulis tribus) et granulis 2 vel 3 in
seriebus radiantibus (2-3) intra marginem et in centro granulorum sublevatis,
supra isthmum tumore granulato, granulis in seriebus parum irregulariter
verticalibus 6-7 ordinatis; a latere visae late. ovato-pyramidatae, apicibus
emarginatis cum angulis apicalibus rotundis; a vertice visae ellipticae,
lateribus cum lato tumore in medio utrobique. Long. 45-50p, Lat. 39-45pa,
Lat. isth. 14-17pa.
Hab. Hekkaido: Kiritappu in Kushiro. Hondo: Jiuemon-ike in K6zuke ;
Kurosawano-ike, Takayachi on Mt. My6ko in Echigo; Happ6-ridge in
Shinano. (PL XXVI, f. 6)
Distr. Japan, Europe, U. S. A., Azores.