Desmids from Thailand and Malaysia

40 M. HIRANO
97. C pseudotaxichondrum Nordst. var. siamense W. & G.S.West Pl.14,f.4.
W. & G.S.West 1901, Bot. Tidsskr. 24, 173, Pl.3, f.26; Scott & Prescott 1961,
Hydrobiol.17, 67, Pl.31, f.12.
L. 35 um, B. 35 xtm, I. 9.6 ptm. Sts. 36,47. Indonesia (Java), Thailand.
98. C. punctulatum Breb. var. subpunctulatum (Nordst.) B6rges.
West 1908, 3, 209, Pl.85, f.1-3; F6rster 1982, 251, Pl.30, f.16,17; Pl. 38, f.10-13.
L. 23-31 ptm, B. 19.5-30 ptm, I. 6.5-11 ptm. Sts. 36,39,47. Cosmopolitan.
99. CpyramidatumBreb. Pl.14,f.2.
West 1905, 2, 199, Pl.64, f.5-7; Scott & prescott 1961, 67, Pl.27, f.1; F6rster 1982,
253, Pl.22, f.1.
L. 66-97 ptm, B. 40-57 ptm, I. 17.6-20 ptm. Sts. 1,2,26,39,40,41. India, Ceylon, In-
donesia (Borneo), Europe, U.S.A., Africa.
100. C. quadratum Ralfs Pl.18, f.1; Pl.19, f.2.
West 1908, 3, 57, Pl.70, f.6-8; F6rster 1982, 255, Pl.24, f.17-19.
L. 70-72 ptm, B. 40-52 ptm, I. 13-20 ptm. Sts. 1,3,38,39,41. Cosmopolitan.
101. C. quadrum Lund. var. quadrum
West 1911, 4, 20, Pl.100, f.3-6; F6rster 1982, 258, Pl.31, f.2.
L. 55-66 "m, B. 53-57 ptm, I. 15.4-22 xtm. Semicells rectangular, lateral margin
slightly convergent, apex straight, apical angles rounded; cell wall with granules disposed
in vertical and oblique series. Sts. 4,10,25,31,51. India, Indonesia (Sumatra), Europe,
Africa. New to Thailand.
101a. var. minus Nordst. Pl.20, f.3.
West 1911, 4, 21; F6rster 1982, 253.
L. 35-37 Ltm, B. 32-37.5 ptm, I. 9.6-11 #m. Cells approximately as long as the
breadth, sinus deep and narrow; semicells subrectangular, apex straight, apical angles
broadly rounded, lateral margin convex; cell wall granulate, granules small, disposed in
vertical and oblique series. Sts. 25,31. Europe. New to Thailand.
101b. var. sublatum (Nordst.) W.&G.S.West Pl.21, f.6.
West 1911, 4,21, Pl.100, f.2; F6rster 1982, 259, Pl.31, f.3.
L. 53-68 ptm, B. 57-65 ptm, I. 17.6-20 ptm. Cells approxiamately as long as the
breadth or a little longer; semicells transversely rectangular, apex straight, lateral margin
convex and convergent upward; cell wall covered with granules disposed in vertical and
somewhat radial series near the margin. St. 12,19. Europe, New Zealand. New to Thai-
land.
102. C quadratulum (Gay) De Toni var. quadratulum Pl.16, f.16; Pl.18, f.20.
West 1908, 3, 121, Pl.72, f.33; Pl.93, f.4; Fdrster 1982, 254, Pl.24, f.12.
L. 11-13 "m, B. 9-11.5 ptm, I. 3.5-4.5 #m. Sts. 10,32,37,51. Europe, Australia.
New to Thailand.
102a. var. boldtii (Messik.) Krieger & Gerloff