The ornamental design for a lawndebrisbag, as shown and described.
FIG. 1 is an isometric view of the invented lawn debris bag showing the new design;
FIG. 2 is a perspective view of the lawn debris bag of FIG. 1 in the fully opened position, the broken lines thereon indicating fold lines;
FIG. 3 is a top view of the leaf bag of FIG. 1;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left end elevational view thereof, the right end view being a mirror image;
FIG. 6 is a front elevational view thereof, the rear view being a mirror image; and,
FIG. 7 is an isometric view of the lawn debris bag in a configuration of use.
The lawn debris bag is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.