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

Fragilariforma virescens(Ralfs) D. Williams & Round image
Fragilariforma virescens var. capitata(Østrup) D.B. Czarnecki Proc. Int. Diatom Symp. 11 [Mem. Calif. Acad. Sci. 17]: 157 1994
Fragilariforma virescens var. capitata(Østrup) M. Poulin in M. Poulin, Hamilton, & Proulx Canadian Field-Naturalist 109: 75 1995
Fragilariforma virescens var. capitata(Ostrup) D.B. Czarnecki image
Fragilariforma virescens var. elliptica(Hustedt) M. Aboal in A. Witkowski (ed.), Diat. Monogr. 4: 81 2003
Fragilariforma virescens var. exigua(Grunow) M. Poulin in P.B. Hamilton, M. Poulin, D.F. Charles, & M. Angell Diatom Res. 7: 30 (table 4) 1992
Fragilariforma virescens var. mesolepta(Rabenhorst) N.A. Andresen, E.F. Stoermer, & R.G. Kreis, Jr. Diatom Research 15: 414 2000
Fragilariforma virescens var. oblongella(Grunow) L.N. Bukhtiyarova Diatoms Ukraine Inland Waters 21, 94 1999
Fragilariforma virescens var. oblongella(Grunow) N.A. Andresen, E.F. Stoermer, & R.G. Kreis, Jr. Diatom Research 15: 415 2000
Fragilariforma virescens var. subsalina(Grunow) L.N. Bukhtiyarova Algologia 5: 418 1995