Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 67. (Budapest 1975)
P. Komáromy, Zs.: Algological investigations of Hungarian forest soils III. Soil algal surface communities in Mts. Mátra
CHLOROPHYCEAE Chlorella botryoides B. PETERSEN (Fig. 5) — The growth consisted of round cells of diverse size, the biggest cells measuring 18—25 pim, the smallest ones 3—7 pim in diameter. The large parietal ehloroplast was distinctly lobed. In the large cells an ellipsoidal pyrenoid was embedded in the ehloroplast, but in the small ones the pyrenoid was not always visible. Small oil drops were scattered in the cytoplasm. Some of the larger cells showed formation of some (4—8) autospores, liberated by irregular rupture of the cell wall. Occurrence: on moist soil ou Mt. Som. Chloroeoccum humicolum (NAEG.) RABENH. (Fig. 6) — The individual cells vary in diameter between (j and 12 pun, being round or flattened by contact with the neighbouringcells. The cell wall is thin. The cells have a parietal pot-shaped ehloroplast with a single pyrenoid. Many cells often unite into families, involved in a common hyaline tegument. Reproduce by zoospores and autospores as well. The zoospores (5—9 pim long, 3—6 urn wide) are biflagellate, ellipsoidal in shape with a cup-shaped ehloroplast and a small stigma. When swarrners come to rest they become rounded. The swarmers frequently act as gametes, pairs of them becoming entangled by their flagella and gradually fuse. No morphological difference was apparent between the zoospores and gametes. Sometimes rounded autospores are formed and liberated by the rupture of the wall or by its gradual gelatinization. Occurrence: on Mt. Som (on brook's bank) among other species. Keratoeoccus bicaudatus (HANSG.) B. PETERSEN (Fig. 7) — The cells are spindel-shaped with longer or shorter acumination and they have thin walls. The cells are 15—18 pim long. The width at the broadest part of the cell is from 5 urn to 7 pim. The ehloroplast is parietal and sometimes folded with or without pyrenoid. The cytoplasm of the older cells is granular. Reproduction: by 2—4 autospores. Occurrence: on brook's bank on Mt. Som and on moist soil near the village Parádóhuta. Oocyst is asymmetr ira W. WEST (Fig. 8) — The cells are asymmetrical oval or spherical. On one side they are more convex than on other. The cells are 2—10 pim wide and 8— 13 pim long. The cell wall is thick with a little thickening at each pole. The ehloroplast is parietal with toothed edge. There is one pyrenoid embedded in the ehloroplast. Reproduce by autospores. Occurrence: on soil surface near Mátrafüred and on Mt. Som (on brook's bank). XANTHOPHYCEAE Chlorocloster simplex PASCH. (Fig. 9) — The cells are slightly bended, spindle-shaped 13—1G pim long and 4—5 pim wide, with tapered and rounded ends. The ehloroplast usually is a parietal lamella with folded edge. The cytoplasm often contains some oil drops. Reproduction by autospores. Occurrence: on moist soil near the village Mátrafüred and on Mt. Vár near Parádóhuta. Monodus subterranea B. PETERSEN (Fig. 10) — The cells are ovoid or oblong ovate 7—9 pim long and 3—4 pim wide. One of the poles is broadly rounded, the other pointed. The ehloroplast is a single parietal lamella sometimes folded. The cytoplasm is frequently granular with small oil drops. Reproduction by autospores. Occurrence: on moist soil in Tariska meadow near the village Parádóhuta. Figs. 1—6. — 1 = Phormidium autumnale (AG.) GOM. — 2 = Phormidiumtenue (.M ENKGU.) GOM. — 3 = I J hormidium valderianum (DEEP.) GOM. — 4 = Tolypothrix tenuis KÜTZ. •— 5 = Chlorella botryoides B. PETERSEN — (3 — Chloroeoccum humicolum (NAEG.) RABENH. — In the figures 10 pim is equal with 20 mm.
