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

PTILONIA(W.H. Harvey) J.G. Agardh image
PTILONIAW.H. Harvey image
Ptilonia australasicaHarvey in Hooker Fl. Tasman. 2: 305, pl. CXC:A 1859
Ptilonia intermediaLucas image
Ptilonia magellanica(Montagne) J. Agardh image
Ptilonia mooreanaLevring image
Ptilonia okadae_('Okadai')Yamada image
Ptilonia subuliferaJ. Agardh Alg. syst. 6: 46 1890
Ptilonia willanaLindauer image