Unveiling the Anatomical and Functional Attributes of Stipular Colleters in Cham. & Schltdl. and (Müll. Arg.) Standl. (Rubiaceae).

The characterization of colleters in Rubiaceae is crucial for understanding their role in plant function. Analyzing colleters in and aims to deepen the understanding of these structures morphoanatomical and functional characteristics. The study reveals colleters with palisade epidermis and a parenchymatic central axis, classified as standard type, featuring vascularization and crystals.