Summer squashes, such as zucchini, globe squash, pattypan, and yellow crookneck squash, are quick-growing, small-fruited, nontrailing or bush varieties of Cucurbita pepo. Plants are upright and spreading, 45 to 75 cm (18 to 30 inches) high, and produce a great diversity of fruit forms, from flattened, through oblong, to elongate and crooked fruits, coloured from white through cream to yellow, green, and variegated. Fruit surfaces or contours may be scalloped, smooth, ridged, or warty. The fruits develop very rapidly and must be harvested a few days after they form (before the seeds and rinds harden) and used soon after harvest. The rind is generally considered edible.