1) Crataegus aestivalis 2) Hawthorn 3) Summer haw 
Mayhaws grow in moist soil in river and creek bottoms under hardwood trees. The fruit ripens in late April through May, thus the name may-haw. The fruit is also found in bayous surrounding lakes, such as Caddo Lake on the Texas/Louisiana border. Mayhaws are often collected out of the water from boats, and the fruit is used to make jelly. Families ...
[n] - hawthorn of southern United States bearing juicy acid scarlet fruit often used in jellies or preserves
summer haw noun hawthorn of southern United States bearing juicy acid scarlet fruit often used in jellies or preserves