81. Piper officinarum (Miq.) C. DC.,

Prodr. 16(1): 356. 1869.

= Piper retrofractum Vahl, Enum. Pl. 1: 314. 1804.

Notes. – Two specimens from Houttuyn’s Java herbarium are respectively in G-PREL [G00818068] and G-DC [G00206609]. Both specimens are annotated as “ Piper longum L.” by Houttuyn. A possible duplicate in L (L-908.165-114) is also marked “ Piper longum L. Cl. Houttuin dedit Jun 1784 ” (msc. D. van Royen).