Cyciotella and Stephannodiscus

Often these cannot easily be told apart, but only by detailed study.They are cylindrical diatoms, 5-50 pm diameter, occurring singly or pai but not in long chains. Often they have a crown of very fine long radiating bristles from each end, not shown here because it is difficult to see.Common , usually planktonic.in pools. lakes. and especially siow rivers. whose water are often brown with them in spring and early summer. 70 a. b. valve and girdle views; 70c, cleaned valve of a Cyclotella.

RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41

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Entromorpha

Entromorpha Plant body tubular hollow (46b c natural size) up to 1 cm wide and 15 cm or more long composed of cells with thick walls and parietal chloroplasts (46a) Sometimes very conspicuous floating in masses on the surface of slow rivers and canals or entangled with larger water plants and may be abundant in brackish water. RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41

Cocconies

Cocconeis Extremely common flat oval diatoms.10-30 micron long.clinging to plants stones and other substrada some times in almost continuous layer cleaned frustule 3 cells on an Oedogonium filament. RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41

Gomphosphaeria (Coelosphaerium )

Gomphosphaeria ( Coelosphaerium ) Gomphosphaeria ( Coelosphaerium ). Small cells up to 5um in diameter, united into a hollaw, roughly spherical, floating colony, sometimes blackish in appearanco and often sur-rounded by mucilage. Colonies reach about 100um across.Conspicuous in the plankton of lakes. RlPPLE WALLET : rE9VzDvqozvgbd2trCKitN4fSi6ENiHu41

VOREGON MICRO ALGAE

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