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The English flora - SeaweedAfrica

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Cymbella.} KLGM DIATOMACE^E. 415<br />

Moist rocks and on the ground. Appin, Captain Carmichael. Pentland<br />

hills, Dr. Greville.— It forms a thin pale ochraceous stratum.<br />

Frustula at first united in pairs, at length separated. Two globules are<br />

sometimes present, which, in a dry state, seem to disappear, at least in<br />

my specimens.<br />

4. C. reniformis, Ag. {kidney-shaped Cymbellci); " frustula<br />

reniform adhering in pairs." Ag. Conspect. Crit. Diat. p. 10.<br />

On reeds, in ponds and streams, Mr. Arnott.— I am not certain<br />

whether I am right in referring the plant before me to C. reniformis. <strong>The</strong><br />

frustula are hyaline and of a very pale yellow, and at length separate.<br />

I have only seen it in the dry state.

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