1972 - The Vasculum
1972 - The Vasculum
1972 - The Vasculum
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VASCULUM VOL. LVII. No. 3. <strong>1972</strong><br />
39<br />
parallela (Grunow) O. Mulier.<br />
Stauroneis<br />
phoenicenteron (Nitzch) Ehrenberg<br />
prominula (Grunow) Hustedt. Occuring in a moss squeezing in one place onIy now submerged. pH<br />
7-7.3.<br />
smithii Grunow. pH 8.<br />
Surirella<br />
birostrata Hustedt.<br />
helvetica (Brun.) Meister. Occurs but rarely and seems to me to be sufficiently unique to stand<br />
alone and not be Included as a variey of S. linearis Wm. Smith.<br />
linearis var. constricta (Ehrenberg) Grunow. pH 6.<br />
ovata Kützing.<br />
Synedra<br />
amphicephala . Kützing.<br />
rumpens Kützing.<br />
ulna (Nitzsch) Ehrenberg. pH 7-8.<br />
Table II<br />
Location of "Dominant Species"<br />
Achnanthes microcephala ABB<br />
Achnanthes minutissima BC<br />
Anomoeoneis zellensis EF<br />
Cymbella cesatii AB<br />
Cymbella delicatula AAAABDDHHH<br />
Cymbella tumidula G<br />
Cymbella parva BBGH<br />
Fragilaria capucina B<br />
Meridion circulare BBBBD<br />
Pinnularia commutata F<br />
A On or in Rivularia colonies.<br />
B On other algae.<br />
C On liverworts.<br />
D On moss on rock.<br />
E Dry flush over turf.<br />
F Wet flush over turf.<br />
G Cold water spring.<br />
H Normal stream.<br />
Plate 1.<br />
Fig. 1,2, Achnantlies lapponica, 3, 4, A. pseudoswazi, 5, 6, 7,8, A. minutissima. 9, 10, A. microephala, 11,<br />
Fragllaria intermedia. 12, 13, A. sublaevis. 14, 15, A. microcephala, 16, 17, A. affinis. 18, 19, Amphora normanii,<br />
20, 21, Anomoeoneis zellensis. 22, Caloneis bacillaris, 23, C. backmanii. 24, 25, Eunotia arcus. 26, E. tenella, 27,<br />
Denticula tenuis, 28, Frustula sp. ? 29, 30, Diploneis minuta. 31, Anomoeoneis exilis. 32, Gomphonema<br />
intricatum, 33, G. olivaceoides, 34, G. pumila. 35, G. intricatum, 36, G. angustata. 37, 38, Cymbella cesatii. 39,<br />
C. angustata? 40, 41, C. delicatula. 42, 43, C. similis? 44, C. microcephala. 45, C. sinuata.<br />
Plate 2.<br />
Fig. 1, Cymbella lapponica, 2, C. naviculiformis, 3, C. parva. 4, C. obtusa. 5, 6, C. laevis. 7, C. tumidula. 8, 9,<br />
C. perpusilla. 10, C. bipartita, 11, Synedra amphicephala: 12, CymbelIa rupicola. 13,14, 15, Cymbella sp.? 16,<br />
Meridion ,circulare. 17,Navicula pupula var. rectangularis, 18, Fragilaria capucina 19, Navicula submuralis. 20,<br />
N. subatomoides. 21, N. bryophila. 22, N. stromii 23, N. caterva. 24 N. cryptocephala, var. 25, Nitzschia<br />
bryophila, 26,. N. angustata 27, 28, Nitzschia sp.? 29, Surirella helvetica. 30, Achnanthes flexella. 31, Pinnularia<br />
leptosoma. 32, P. commutata. 33, P. cleveana. 34, Stauroneis prominua, 35, S. smithii.
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