Origin: as chance seedling from seed of unknown parentage planted about 1910 by J.M. Chestnutt. Propagation rights sold to F.A. Mahan, Monticello Nursery Co., Monticello, Fla., in 1927. Nut: oblong, with acute apex and base; nut often asymmetric, appearing "pinched" in middle due to flattening of abaxial and adaxial surfaces; flattened in cross section; 32 nuts/lb, 58% kernel; kernels with deep secondary dorsal grooves and basal cleft, often poorly filled to base, woody in texture. Homozygous for protogyny (PP), which is a dominant allele, making all Mahan progeny protogynous. Mid-to lateseason pollen shed, with early to mid-season receptivity. Very precocious and prolific, with a strong tendency to overbear as a mature tree. Ripens late, about 12 days after Stuart. Very susceptible to scab. Mahan is the female parent of Tejas, Kiowa, Harper, Mahan-Stuart, and Maramec and the pollen parent of Choctaw, Wichita, and Mohawk. Recommended (1990) for planting only in Arizona. Tree: Fruit:
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