The following two taxa may lie within the circumscription of Phacelocarpus peperocarpos but have not yet been transferred or reduced to synonymy:
Phacelocarpus labillardieri (Mertens ex Turner) J. Agardh var. intermedius Harvey, 1863: xxxii (syntype localities: "West and south shores of New Holland. Tasmania'').—Sonder, 1880: 21.— De Toni, 1900: 392.
INDIAN OCEAN DISTRIBUTION: Australia.