digressive, discursive, excursive, rambling
Meaning: (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects; "amusingly digressive with satirical thrusts at women's fashions among other things"; "a rambling discursive book"; "his excursive remarks"; "a rambling speech about this and that"
Meaning: proceeding to a conclusion by reason or argument rather than intuition
SADLY discursive as I have already been, I must still further entreat the reader's patience, as I am about to string together, without any attempt at order, a few odds and ends of things not hitherto mentioned, but which are either curious in themselves or peculiar to the Typees.