pithiest

Webster's Dictionary (GCIDE)

1.Consisting wholly, or in part, of pith; abounding in pith; as, a pithy stem; a pithy fruit. [1913 Webster]

2.Having nervous energy; forceful; cogent. [1913 Webster]

This pithy speech prevailed, and all agreed.— Dryden.[1913 Webster]

In all these Goodman Fact was very short, but pithy.— Addison.[1913 Webster]

Pithy gall (Zool.), a large, rough, furrowed, oblong gall, formed on blackberry canes by a small gallfly (Diastrophus nebulosus). [1913 Webster]