1 literature reference for Piptostigma glabrescens Oliv.:

Author: Oliver, D.
Year: 1865
Title: On four new genera of plants of western tropical Africa, belonging to the natural orders of Annonaceae, Olacineae, Loganiaceae, and Thymelaeaceae; and on a new species of Paropsis.
Source: J. Linn. Soc., Bot. 8: 159.