Page 18 - e-Book

Thalli colonial, forming 4-8 celled coenobia not embedded in mucilaginous envelope. Cells

arranged in a linear or sub alternating series. Cells fusiform to spherical in surface view with
small space between cells. 8 celled colonies always in sub alternating series. Cell walls

smooth, cells uninucleate. Chloroplast single and parietal with single pyrenoid. Cells 3-5 µm
broad 15-18 µm long.

Accession No. CTR00057

8. Tetradesmus obliquus (Turpin) M. J. Wynne (=Scenedesmus bijugatus Kützing)
(Philipose 1967, pg. 252, Fig. 164) (Pl. 1, Fig. I)

Colonies flat or slightly curved, 2-4-8 cells arranged in a single linear series. Cells oblong
ellipsoid to ovoid with the ends broadly rounded. Cells 3-5 µm broad 7-10 µm long.

Accession No. CTR00058

9. Steinedesmus gravenitzii (C. Bernard) Comas & Komarek (=Scenedesmus bijugatus var.
gravenitzii (C. Bernard) Philipose)

(Philipose 1967, pg. 252, fig.164) (Pl. 1, Fig. L)
Phylum: Chlorophyta

Class: Chlorophyceae
Order: Sphaeropleales

Family: Scenedesmaceae

Genus: Steinedesmus
Colonies four to eight celled. Cells fusiform, ellipsoid, oblong-ellipsoid to ovoid with obtuse

poles and arranged in an alternating series with adjacent cells in contact only along a short
portion of their length. Cells 4-7 µm broad and 10-15 µm long.

Accession No. CTR00059

10. Trebouxia arboricola Puymaly (=Trebouxia humicola G. S. West & F. E. Fritsch)

(Philipose 1967, pg.76, Fig. 4) (Pl. 2, Fig. D)
Phylum: Chlorophyta

Class; Trebouxiophyceae

Order: Trebouxiales
Family: Trebouxiaceae

Genus: Trebouxia
Cells unicellular, spherical, contains a star like (stellate) or aggregated chloroplast with a

single pyrenoid at the centre. Cells 4-18 µm in diameter.
Accession No. CTR00060

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