Flora Desmidiarum Japonicarum IV
Flora Desmidiarum Japonicarum IV
Flora Desmidiarum Japonicarum IV
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210 Minoru HIRANo : <strong>Flora</strong> <strong>Desmidiarum</strong> japonicarum<br />
Hab. Hondo: SawanO•-ike in Yamashiro. (Pl. XXIX, f. 18) •'<br />
Distr. Japan.<br />
var. Iatiusculum (W. & G, S. WEsT) HIRANo, stat. nov.<br />
Arthrodesmus 'Incus<br />
tlBREB.) HASS. var. Ralfsii W. & G. S. WEsT forma latiuscula W.&G.<br />
S. WEsT in Monogr. Brit. Desm. 4, 96, 1911; SCHuLz Bot. Arch. 2, 137, 1922; HIRANo Bot<br />
Mag. 66, 206, 1953.<br />
Var. marginibus ' lateralibus semicellularum ' leviter 2-undulatis, spinis<br />
convergentibus. Long. 19.4-25,pa, Lat. sine spin. 15.4-22pa, Lat. isth. 4.2-7pa.<br />
Hab. Hokkaido: Tomakomai in Iburi. Hondo: Ogata in Ugo; 6ishita.<br />
Hijiori-nEt!;a-numa, Mazawano-naga-numa, Hakuryu-ko in Uzen ; Naga-numa.<br />
Kobuchi-numa in Rikuzen; Ojiroi in Iwaki; Oze-numa in K6zuke; Mohara<br />
in Kamifusa ; Higusa-numa in Shimofusa; Inago' o'<br />
f• Kitamaki-mura, Ashinotaike,<br />
Happ6-ridge in Shinano ; Gakinotanbo in Etchti ; Takashihara in Mikawa ;,<br />
Nukigawa of Lake Biwa in Oomi, Kiushiu: Yabakei in Bunzen. (Pl.<br />
XXIX, 24) f.<br />
Distr. Japan, British' Isles,<br />
This variety is somewhat different from the British description in itsbiundulate<br />
lateral margin, slightly elongated isthmus and elevated apex.<br />
var. acuminatum HIRANO in Mem. ColL Sci. Univ. Kyoto, B, 19, 67, 1948.<br />
Semicellulae levissime elongatae, sinu extremD acuminato. Long. 8".<br />
Lat. sine spin, 6pa, cum spin. 16pa, Lat. isth. 1,5".<br />
Hab. Hondo: Sawano-ike in Yamashiro, (Pl. XXIX, f. 23)<br />
Distr. Japan.<br />
Arthrodesmus extensus (ANDERs.) HIRANo stat. nov.<br />
Arthroa•esmas Incus ÅqBREB.) HAss. var. extensus ANDF.Rs. in BoRGEBot.Notis.25, 1913;,<br />
SMITH Wisc. Bull. 57, 132, 1924-var. indentatus W. & G. S. WEsT in Monogr. Brit. Desm.<br />
4. 94, 1911; HIRANo Bot. Mag. 66, 206, 1953.<br />
. Cellulae parvae, circiter tam longae quam latae •sine spinis, profunde<br />
constrictae, smu excavato et semicirculari, isthmo elongato; semicellulae<br />
subrectangulares, angulis basalibus subrectangularibus, marginibus lateralibus<br />
superioribus leviter retusis, angulis apicalibus leviter productis et obtusis•<br />
cum spina longa una divergente directa ordinatis, apice truncato et leviter<br />
concavo ; a latere visae circulares ; a vertice visae ellipticae, polis cum spina,<br />
ordinatis. Long. sine spin. 13-17pa, Lat, sine spin. 14-16.8pa, Lat. isth. 5.6-6.3pa.<br />
Hab. Hokkaido: Ch6bushi-numa in Nemuro; Kiritappu, Akan-junsainuma<br />
in Kushiro; Nikuru-numa, Komukai-ponto, Sarufutsu in Kitami;.<br />
Tomakomai in Iburi. Hondo: Mt. Hakkoda, Mt. Hachimantai in Mutsu;
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