FIGURE 5.

Average organ sizes and cuticle thicknesses for four Funariaceae species (circle Aphanorrhegma serratum, triangle Funaria hygrometrica, square Physcomitrellopsis africana, diamond Physcomitrium pyriforme) at two developmental stages (young in red, older in green). Sporophyte height and calyptra length were averaged from five individuals of each species at each developmental stage (N = 40). Cuticle thicknesses were measured from the periclinal cell walls of the epidermis for three individuals per species at each developmental stage (N = 24). All regression lines are surrounded by 95% confidence intervals in gray (young in red, old in green, combined in blue). (A) Sporophyte height correlated with calyptra length; Young, adjusted R² = 0.98, df = 3, P < 0.01; Older, adjusted R² = 0.91, df = 3, P < 0.05. (B) Sporophyte height correlated with calyptra cuticle proper thickness; adjusted R² = 0.79, df = 23, P < 0.001. (C) Sporophyte height correlated with calyptra cuticular layer thickness; adjusted R² = 0.48, df = 22, P < 0.001. (D) Sporophyte height correlated with sporophyte cuticle proper thickness; Young, adjusted R² = -0.005, df = 11, P = 0.35; Older, adjusted R² = 0.59, df = 11, P < 0.01. (E) Sporophyte height correlated with sporophyte cuticular layer thickness; Young, adjusted R² = 0.05, df = 11, P = 0.23; Older, adjusted R² = 0.22, df = 11, P = 0.07.