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Volume 79, 1951
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Notes On New Zealand Algae

[Read before the Auckland Institute, March 15, 1950; received by Editor, March 17, 1950.]

In a revision of the marine Myxophyceae and Chlorophyceae of New Zealand, which it is hoped to publish shortly, one new species of Rhodophyceae has been recorded and one new species of freshwater Chlorophyceae. In addition a number of new fresh-water records have been made. In the case of the Myxophyceae the determinations have been carried out by Dr. F. Drouet, of the Chicago Natural History Museum, and I extend my thanks to him. Mr. L. W. Crawley, of Auckland University College, has very kindly been responsible for the Latin diagnoses.

Rhodophyceae

1.

Erythrocladia irregularis Rosenv., on Sertularia sp. New record for New Zealand.

2.

Schmitziella cladophorae sp. nov.

Thallo formante patinam expansa complanatam, crassitudine unicellulari, ex ordinibus cellularum radiantibus intra parietem hospitis positis constantem; non calcario; ordinibus cellularum dichotome ramosis; corporibus genitalibus nemathecia intra protrusiones tumidas formantibus.

Thallus forming an expanded flattened plate one cell thick, composed of radiating rows of cells, within the wall of the host; non-calcareous; branching of cell rows dichotomous; reproductive bodies forming nemathecia within swollen protuberances (fig. 1).

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Fig. 1—Schmitziella cladophorae. a, b, margin of thallus; c, section of thallus in wall of host; d, margin of young thallus; e, section of a nemathecium.

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Occurrence: Parasitic within the cell walls of Cladophora feredayi wherever the host plant occurs.

This species appears to be specifically restricted to the one species of Cladophora in just the same manner that S. endophloea is restricted in Great Britain to C. pellucida.

Chlorophyceae

1.

Rhizoclonium hieroglyphicum Kutz.

Soil at Swanson. Nordstedt (1888) gives other localities.

2.

Ulothrix aequalis Kutz.

Silica Springs at National Park. A new record for New Zealand.

3.

Microspora pachyderma Lager.

Stream running into Silica Springs, National Park. New record for New Zealand.

4.

Prasiola skottsbergii Levring.

Russell. Collected by Mr. V. W. Lindauer, and the plants agree well with the original description.

5.

Prasiola delicatula sp. nov.

Plantis tenuibus, stipitatis, filamentosis, ad 1 mm. latis, 7 mm. longis, colore gramino-viridi; cellulis in binas, trinas, quaternas catervatis, 3–7μ dia., 7–8μ altis in T.S.; membrana gracili, 11·2μ crassa, parietibus vix crassatis.

Plant fine, stipitate, delicate, up to 1 mm. wide and 7 mm. long; cells in 2's, 3's and 4's, 3–7μ diameter, 7–8μ high in T.S.; membrane fine, 11·2μ thick, walls scarcely thickened; grass green; adheres well to paper (fig. 2). Ditch, Russell. Distributed by V. W. Lindauer as No. 227.

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Fig. 2—Prasiola delicatula, cells in surface view (a), and t.s. of the thallus (b).

6.

Zygogonium ericetorum Kutz.

Tussock grassland, National Park. New record.

7.

Cylindrocystis brebissonii Menegh.

Harihari, Westland. This species is recorded by Nordstedt (loc. cit.) from other localities.

Myxophyceae

1.

Chamaesiphon incrustans Grun.

On Cladophora sp. from Hunua Falls. Recorded by Nordstedt (loc. cit.) from other localities.

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2.

Gloeocapsa alpicola Lyng.

Harihari, Westland. This species is also recorded (as G. magma) by Nordstedt (loc. cit.)

3.

Gloeocystis grevillei.

Harihari, Westland; Omanuta. New record for New Zealand.

4.

Scytonema figuratum Ag.

Harihari, Westland; Keri-keri. Also recorded by Nordstedt (loc. cit.). V. W. Lindauer, no. 151.

5.

Schizothrix lamyi Gom.

Omanuta. New record for New Zealand.

6.

Nostoc microscopicum Carm.

Omanuta. New record for New Zealand.

7.

Stigonema ocellatum (Dill.) Thur.

Stream into Silica Springs, National Park. Also recorded from elsewhere by Nordstedt (loc. cit.).

8.

Stigonema mamillosum (Lyng.) Ag.

Cave, Rangitoto; Keri-keri. New record for New Zealand. Distributed by V. W. Lindauer as No. 78.

The material from Harihari and Omanuta was collected by R. C. Lloyd of the State Forest Service.

Nordstedt, O., 1888. Fresh-water algae collected by Dr. S. Berggren in New Zealand and Australia. Kongl. Svensk. Vetens. Akad. Handl., 22 (8).