STANCHEVA, Rosalina, John D. HALL, Richard M. McCOURT, & Robert G. SHEATH 2013 (June) Identity and phylogenetic placement of Spirogyra species (Zygnematophyceae, Charophyta) from California streams and elsewhere J. Phycol. 49(3): 588-607, 7 figs. 15 species found in 1200 samples of California steams; 12 not previously known from California, including 2 new species: Spirogyra californica and S. juliana |