Variação cambial em Serjania caracasana (Sapindaceae): enfoque na adequação terminológica
Tamaio N; Angyalossy V
The corpus lignosum compositum is assigned in this work as â€œcompound vascular cylinderâ€ and is typical for the lianas from the Sapindaceae family. In the stem of the Serjania caracasana (Jacq.) Willd. this cambial variant is represented by a central vascular cylinder surrounded by eight peripheral vascular cylinders. There is no consensus about the terminology that involves this structure making difficult an anatomical approach without a terminological adequacy. In this study through the anatomical analysis it was verified that even before the vascularization there are indications of a compound vascular structure with the formation of eight lobes that surround the central area. With the beginning of the vascularization of each lobe the central area is called â€œvascular cylinderâ€. The term adopted here â€œcompound vascular cylinderâ€ is proper because it reflects the homology between the vascular cylinders in S. caracasana through the procambial origin. This term shows a descriptive attribute that enables the concept understanding and keeps the linguistic equivalence with the original term â€“ corpus lignosum compositum. We reject the term â€œmultistelar stemâ€ and â€œpolystelic stemâ€ because the results obtained here indicate the presence of a single stele in the stem.