Piper sp.
Piper sp. grows as a large shrub to a small tree, with a single flower stalk opposite each leaf that is typical of the pepper family (1). The roots are used to treat various conditions in traditional medicine (1).  Several compounds from Piper species have shown fungitoxic activity (2,3).

(1) Castner, JL, Timme, SL and Duke, JA (1998) A field guide to Medicinal and Useful Plants of the Upper Amazon. 154 p.

(2) Lago JH, Ramos CS, Casanova DC, Morandim Ade A, Bergamo DC, Cavalheiro AJ, Bolzani Vda S, Furlan M, Guimaraes EF, Young MC, Kato MJ (2004) Benzoic acid derivatives from Piper species and their fungitoxic activity against Cladosporium cladosporioides and C. sphaerospermum. J Nat Prod 67(11): 1783-8

(3) Danelutte AP, Lago JH, Young MC, Kato MJ (2003) Antifungal flavanones and prenylated hydroquinones from Piper crassinervium Kunth. Phytochemistry 64(2): 555-9