Diagram in frontal view of the morphoanatomical patterns of calyx gland distribution.

Type I, eglandular. Type II, two marginal glands in posterior sepal. Type III, two marginal glands in posterior sepal and one marginal gland on posterior side in each lateral sepal. Type IV, each anterior sepal with two glands. Type V, distinct from type IV due to the one anterior gland in an intersepalar position. Type VI, one gland in the intersepalar portion of the anterior sepal pair. Type VII, two marginal glands in one of the anterior sepals and one marginal gland in the other anterior sepal. Type VIII, two marginal glands in the posterior sepal, two marginal glands in one of the anterior sepals and one marginal gland in the other anterior sepal. Type IX, two marginal glands in the posterior sepal and one marginal gland on the posterior side of each anterior sepal. Type X, one gland in each intersepalar portion.