Article
Health condition of palm trees of Mexico City, with an emphasis on “crowns”
Figure 2
Representation of the visual health assessment scale in palm trees [modified from 26,27,28]. A. Diagrammatic 12-section scale overlapped on the “crown” of a Phoenix canariensis specimen. AB. Circumference to evaluate live crown ratio (LCR). C. Upper semicircle, e.g., 9:00-3:00 h, used to determine crown quality (CQ). D. Lower semicircle, e.g., 3:00 to 9:00, used to determine the abundance of dead fronds.