Silva Center for Phycological Documentation: Index Nominum Algarum

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Indexes (very large files) to all taxa:

_A Z_

Hydrurus irregularis f. crassus ('crassa') Rabenhorst
Alg. Sachs. Dec. 73/74: letterpress to nos. 721-739. 1858 (Sept.).
correction of Hydrurus irregularis f. causta Rabenhorst 1858

Retrieve all Hydrurus
Get original family assignment from Index Nominum Genericorum
Check for UC specimen record
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University Herbarium, University of California, Berkeley