Freshwater Algae of the Southeastern United States, Parte 4

1.5 times longer algae angles rounded Apex of semicells apex slightly dilated apical angles apical margin basal angles Bicudo Borge Brebisson cell wall smooth Cells about 1.5 chloroplast cluding spines constriction moderately deep Cosmarium crenate crenulations Croasdale Desmids DIST Elisha Mitchell end view semicell excluding spines Face of semicells Foerster Forest forma granules inflation intramarginal Irenee-Marie isthmus Krieger & Gerloff lateral margins longer than wide lower angles Lundell Margins of semicells McInteer median constriction deep median constriction moderately midregion Nordstedt otherwise differing poles Prescott & Scott pyrenoid Ralfs Schumacher Scott & Groenblad scrobiculations semicells transversely side view semicells sinus linear sinus narrowly linear sinus open sinus widely open slightly retuse subrectangular thick thickened tubercle typical undulate upper angles view semicell broadly view semicell elliptic view semicell oval view semicells circular view semicells subcircular West & West Whitford wide as long Wolle Woodson & Holoman zygospores globose