Desmids from Thailand and Malaysia
Desmids from Thailand and Malaysia
Desmids from Thailand and Malaysia
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Scott & Prescott 1961, 95, Pl.56,' f.10.<br />
Desmials <strong>from</strong> <strong>Thail<strong>and</strong></strong> <strong>and</strong> <strong>Malaysia</strong> 75<br />
L. 22 xtm, Bcpr. 3S xtm, <strong>and</strong> I. 5.7 ptm. Cells small, 1.6 times broader than the<br />
length including processes, sinus open acutely; semicells subfusiform, apex slightly con-<br />
vex, apical angles produced into the process almost horizontal or slightly <strong>and</strong> divergently<br />
curved near the apices, margins of a process furnished with short denticulations St. 19.<br />
Indonesia (Sumatra). New to <strong>Thail<strong>and</strong></strong>.<br />
42. St. hexacerum (Ehrenb.) Wittr. f. hexacerum Pl.40, f.6.<br />
West & Carter 1923, 5, 138, Pl.142, f.11-14; Prescott et al. 1982, 2:4, 220, Pl.401,<br />
f. 10,11.<br />
L. 22 xt m, B. 26.4 ptm, <strong>and</strong> I. 6.5 xtm. St. 2. Cosmopolitan. New to <strong>Thail<strong>and</strong></strong>.<br />
42a. f. pentagona Krieger Pl.42, f.9.<br />
Krieger 1932, 201, Pl.16, f.18.<br />
L. 26.4 ptm, B. 30.8 um, <strong>and</strong> I. 8.8 ptm. St. 43. Burma, Indonesia (sumatra). New to<br />
<strong>Thail<strong>and</strong></strong>.<br />
43. St. horametrum Roy & Bisset var. orientate Scott & Prescott Pl.47, f.1.<br />
Scott & Prescott, 1961, 95, Pl.56, f.3.<br />
L. 29.5-33 "rp, B. 26.4-27.7 #m, <strong>and</strong> I. 7.5-8.8 #m. Cells of a little less than a<br />
medium size, 2.6 times broader than the length, moderately constricted, sinus almostly<br />
rectangularly open; semicells 4-angular, sides concave, angles slightly produced <strong>and</strong> with<br />
2 rows of denticulations around near a process. Sts. 28,29. Indonesia (Sumatra). New to<br />
<strong>Thail<strong>and</strong></strong>.<br />
44. St. hystrix Ralfs Pl.37, f.5.<br />
West & Carter 1923, 5, 60, Pl.136, f.1; Prescott et al. 1982, 2:4, 221, Pl.362, f.4.<br />
L. 23.3 Ltm, B. 19.8 Ltm, <strong>and</strong> I. 13 xtm. Sts. 39,40,41. Japan, Europe, U.S.A., Brazil.<br />
New to <strong>Thail<strong>and</strong></strong>.<br />
45. St. inconspicuum Nordst. var. crassum Gay Pl.49, f.11<br />
West & Carter 1923, 5, 87, Pl.141, f.8; Krieger 1932, 201, Pl.16, f.21; Prescott et al.<br />
1982, 2:4, 224, Pl.390, f.15.<br />
L. 12.3-15.4 ptm, B. 12.3-14 ptm, <strong>and</strong> I. 4.5 ptm. Sts. 19,25,53. Japan, Indonesia<br />
(Sumatra). New to <strong>Thail<strong>and</strong></strong>.<br />
46. St. indentatumW.&G.S.West PL45,f.3,4.<br />
West 1902, Trans. Linn. Soc. Bot. 6, 257, Pl.22, f.10-12; Skuja 1949, 158, Pl.35, f.14<br />
-16; Scott & Prescott 1961, 96, Pl.50, f.6,7.<br />
L. 37.4-42 xtm, Bcsp. 60-79 um, <strong>and</strong> I. 6.5-8.5 xzm. Cells biradiate, 1.6 times<br />
broader than the length including a process, shallowly constricted at the middle, sinus<br />
acuteiy open; semicells campanulate, basal part inflated, apex slightly convex <strong>and</strong> with<br />
emarginate verrucae, apical angles produced into a long, somewhat convergent, denticu-<br />
lated process <strong>and</strong> ends minutely spinated, base of a process of the ventral margin with a<br />
or 2 emarginate verrucae, Sts. 19,24,32. Ceylon, Burma. New to <strong>Thail<strong>and</strong></strong>.
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