The ornamental design for a stand for christmastree, as shown and described.
FIG. 1 is a perspective view of a stand for Christmas tree showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an enlarged portion view taken from encircled portion labeled “FIG. 8” in FIG. 6.
The even dashed broken lines represent unclaimed environment and form no part of the claimed design. The dash-dot lines represent the boundary line of the enlarged portion view of FIG. 8 shown in FIGS. 6 and 8.