Silva Center for Phycological Documentation: Index Nominum Algarum

The INA is a card file and online reporting system maintained at the Silva Center for Phycological Documentation of the University Herbarium, University of California, Berkeley. It contains nearly 200,000 names of algae (in the broad sense). The BPU is a card file containing bibliographic references pertaining to algal taxonomy.
A working list of algal type specimens at UC is available here

Results from INA database

Cladophora gracilis(Griffiths) Kützing image
Cladophora gracilis f. australisCollins image
Cladophora gracilis f. elongataCollins image
Cladophora gracilis f. elongataF.S. Collins in Collins, Holden, & Setchell Phyc. Bor.-Amer.: 725 1900
Cladophora gracilis f. expansa(Farlow) Collins in Collins, Holden, & Setchell Phycoth. Bor.-Amer.: no. 981 1902
Cladophora gracilis f. subflexuosaCollins image
Cladophora gracilis f. vadorum(J.E. Areschoug) Strömfelt image
Cladophora gracilisHassall image
Cladophora gracilisKützing Phycol. Germ.: 215 1845
Cladophora gracilis var. elongata(Collins) Schiffner image
Cladophora gracilis var. expansaFarlow Mar. alg. New England (Report of the U.S. Commissioner of Fish and Fisheries for 1879): 55 1881
Cladophora gracilis var. harveyanaSjöstedt image
Cladophora gracilis var. kuetzingiiSjöstedt image
Cladophora gracilis var. strictaSchiffner image
Cladophora gracilis var. tenuisThuret image
Cladophora gracilis var. tenuisThuret ex Farlow image
Cladophora gracilis var. vadorum(Areschoug) F.S. Collins image