2002, Charles Fergus, “Broad-Leaved Trees”, in Trees of Pennsylvania and the Northeast, Stockpole Books, →ISBN, page 168:
A broad, exceedingly thorny plant, cockspur hawthorn can grow 25 to 30 feet tall, with a trunk diameter of 10 to 12 inches.
1995, Jerry Minnich, “Lawns, Trees, and Ornamental Plantings” (chapter 8), in The Wisconsin Garden Guide, Prairie Oak Press, page 248:
Cockspur hawthorn and Washington hawthorn retain their fruits all winter long.
2005, Jeffrey G. Meyer, “Shade Trees”, in The Tree Book, Scribner, page 118:
The cockspur hawthorn is used in clipped hedges and less formally controlled hedgerows, where the cockspur's density and thorns help keep out animal pests.