PERFORACIONES ESCALARIFORMES EN VASOS DE ÁRBOLES NATIVOS DE CHILE.

Perforation plates are openings in the end walls of vessel elements, allowing water flow between neighboring vessel elements in longitudinal direction. There are many types of perforation plates, simple, scalariform, reticulate and foraminate. In this study a classification and description of scalariform plates was made, as a contribution to the knowledge of anatomic wood structure of native species. To determine the number of bars and spaces between bars per scalariform perforation plate, were selected 10 species of natives Angiosperm of Chile having this type perforation. Species were Aextoxicon punctatum Ruiz et Pavón, Laureliopsis philippiana (Looser) Schodde, Laurelia sempervirens (Ruiz et Pavón) Tul., Weinmannia trichosperma Cav., Caldcluvia paniculata (Cav.) D.Don., Eucryphia cordifolia Cav., Citronella mucronata (Ruiz et Pavón) D. Don, Luma apiculata (DC.) Burret, Escallonia revoluta (Ruiz et Pavón) Pers., Azara serrata Ruiz et Pavón. [ABSTRACT FROM AUTHOR]