3.7. Koellensteinia ionoptera Linden & Rchb. f. in Reichenbach (1885b: 1451).

Aganisia ionoptera (Linden & Rchb. f.) Brown (1882: 266) . Aganisia ionoptera (Linden & Rchb.f.) Nicholson (1885: 35), nom. illeg. Aganisia ionoptera (Linden & Rchb.f.) Rolfe (1891: 97), nom. illeg.. Paradisanthus ionopterus (Linden & Rchb.f.) Schlechter (1914: 419) . Type:—Peru. Moyobamba: S. loc., ex hort., s.d., Wallis sub Linden s.n. (lectotype, designated here, W-R 38112, only the two inflorescences on the right!)

Koellensteinia peruviana Schlechter (1918b: 28) . Type:—Peru. Loreto: Puerto Canela [?], March 1903, Ule 6691 (lectotype, designated here, HBG s.n.!, type B†, Field Museum negative number 18351!), syn. nov.

Etymology:— From Greek, ιόν-, violet, and πτέρυξ, flower, due to its violet spotted flowers

Selected material examined:— PERU. Moyobamba: Jesús del Monte, August 1938, Haudemen s.n. (K). Ocaña: Teta, 1906, Lehmann BI 112 (K).

Distribution:— Colombia. TDWG code: 83 PER-OO.

Diagnostic characters:— Koellensteinia ionoptera differs from the other species in its purplish flowers with the width of the lip midlobe equal or subequal to the length between lateral lobes.

Taxonomic note: —Schweinfurth (1952) mistakenly considered Koellensteinia peruviana a synonym of K. eburnea, possibly due to Cogniaux’s misidentification (as Cyrtopodium eburneum) on the type of K. peruviana at B.