Arethusa divaricata Linnaeus, Species Plantarum 2: 951. 1753.

"Habitat in Americae borealis paludosis." RCN: 6872.

Lectotype (Catling & Gregg in Lindleyana 7: 70. 1992): Clayton 635, Herb. Linn. No. 1059.3 (LINN; iso- BM) .

Current name: Cleistes divaricata (L.) Ames ( Orchidaceae).