If there are inflorescences in the leaf axils, then it is a branch rather than a compound leaf. In compound leaves, the color and texture of the petiole and rachis tend to be different from that of the branch while the color and texture of a branch tends to be the same as that of thicker branches. If you fold large leaves, one can sometimes put two large leaves on a sheet rather than one. For palms, describe the position of the inflorscence in relation to the leaves, also whether species are solitary or colonial, and include samples of stem spines and bark. Each specimen, at aminimum, should consist of an apex, a base, a mid-section, selected parts of the inflorescence, stem, and petiole base.
Photographs are very useful.
A representative specimen of large plant may require additional sheets for completeness. In general do not overcrowd sheets. Multiple-sheet specimens contain far more information than fewer overcrowded sheets. Large fruits should be cut into one inch thick slices, both longitudinally and transversely. It is preferable to have the fruits attached to the branches when the specimen is mounted.