]> Botany [collector note: Montana: FH] Rydberg, Per Axel & Bessey, Charles Edwin Rydberg, Per Axel & Bessey, Charles Edwin P. A. Rydberg & C. E. Bessey Per Axel Rydberg & Charles Edwin Bessey Rydberg & Bessey Rydberg, P. A. & Bessey, C. E.