Calla Lily Small 320×114 Medium 640×229 Large 1024×366 Download Tiff Original 2400×857 | (742.8 KB) Description Magnified view of a portion of a transverse slice of stem of Calla Lily. The great spaces are tubular air-channels built up by the cells. Keywords Botany, plants, veins Galleries Cellular Botany Source: Asa Gray The Elements of Botany for Beginners and for Schools (New York, Cincinnati, Chicago: American Book Co., 1887) Courtesy the private collection of Roy Winkelman
