FIG. 4 in Internal secretory structures and chemical compounds in leaves of Conyza bonariensis (L.) Cronquist and Solidago chilensis Meyen (Asteraceae, Astereae)

FIG. 4. — Cavities (blue colour) on abaxial side in paradermal view: A, Conyza bonariensis (L.) Cronquist, showing 1ST to 3rd vein orders with oblong cavities and false duct, and in 4th order veins solitary cavity or in small groups; B, Solidago chilensis Meyen, showing linear cavities enclosed in false duct in the first, second and third vein orders, cavities oblong, triangular, rounded in veins of 4th to 6th orders. Abbreviations: 1-4, vein orders. Scale bars: 1 mm.