Might Heterostyly Underlie Spider Occurrence on Inflorescences? A Case Study of Palicourea rigida (Rubiaceae), a Common Shrub from Brazilian Cerrado

Figure 4

Graphic representation for the first two axes of the PCA performed with the architectural variables of P. rigida inflorescences. Objects: sampled brevistylous and longistylous inflorescences, the object number indicates the number of the sampled P. rigida shrub. Vectors and Structures: number of floral structures such as open and closed buds, floral abortions, and infrutescences; branch length: total inflorescence length; 1st, 2nd, 3rd, 4th, 5th, and 6th branching: density of primary, secondary, tertiary, quaternary, quinary, and senary branches, respectively.