“…in the chloroplasts of leaves of beet (Englebrecht and Esau 1963), Abutilon (Sun 1965), coconut palm (Price, Martinez, and Warmke 1967), Macadamia (Price and Thomson 1967), Vicia faba (Shumway, Weier, and Stocking 1967), and of the sporangial wall of Equisetum (Manton 1966); in cytoplasm (Cronshaw 1964;Thornton and Thimann 1964;Marinos 1965;Arnott and Smith 1967;Petzold 1967); in xylem vessels (Arnott and Dauwalder 1967); and in mitochondria (Arnott 19.(7). Early observations (Englebrecht and Esau 1963;Sun 1965) associated the inclusions with a virus infection, but later observations (Cronshaw, Hoefert, and Esau 1966;Price, Martinez, and Warmke 1966;Price and Thompson 1967) have refuted this possibility. Most of the crystalline inclusions have been shown surrounded by a membrane.…”