Shagbark \Shag"bark`\, n. (Bot.) A rough-barked species of hickory (Carya alba), its nut. Called also shellbark. See Hickory.
   (b) The West Indian Pithecolobium micradenium, a legiminous tree with a red coiled-up pod.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Shellbark \Shell"bark`\, n. (Bot.) A species of hickory (Carya alba) whose outer bark is loose and peeling; a shagbark; also, its nut.

Source: Webster's Revised Unabridged Dictionary (1913)