Koellensteinia hyacinthoides Schlechter (1925: 126)

Thiago E. C. Meneguzzo, José F. A. Baumgratz & Cássio Van Den Berg, 2015, Taxonomic studies in the Aganisia complex (Orchidaceae, Zygopetalinae), Phytotaxa 238 (1), pp. 1-39 : 20

3.6. Koellensteinia hyacinthoides Schlechter (1925: 126) .

Type:—BRAZIL. Amazonas: S"o Gabriel da Cachoeira, Taracuá, River Uaupés, 12 April 1975, Nascimento, Pires & Coradin 102 (neotype, designated here, HB 66673!, isoneotypes HB 66412!, IAN 148213!, INPA 53723!, MG 53723!, RB 173722!). The original type was destroyed: BRAZIL. Amazonas: S"o Gabriel da Cachoeira, Taracuá, River Uaupés, March 1924, Hübner 183 (type B†). Fig. 6 C

Etymology:— From Greek, uάκινθος, and the suffix -οειδης, similar to, in reference light yellow flowers like some cultivars of Hyacinthus .

Selected material examined:— BRAZIL.Amazonas: S"o Gabriel da Cachoeira, 16 March 1975, Pires & Marinho 15874 (IAN). COLOMBIA. Guainía: Maimachi, 2 April 1993, Madriñán & Barbosa 847 (GH). GUYANA. Upper Takutu-Upper Essequibo: Komo Creek, December 1948, Forest Department WB 639 (K). SURINAME. Nassau: 11 March 1949, Lanjouw & Lindman 2620 (U). VENEZUELA. Amazonas: Cerro Yapacana, 7 May 1979, Steyermark & Bunting 103203 (AMES).

Distribution:— French Guyana, Guyana, Suriname, Venezuela, Colombia and northern Brazil:Amazonas.TDWG code: 82 GUY-OO SUR-OO VEN-OO 83 CLM-OO 84 BZN-AM.

Diagnostic characters:— Koellensteinia hyacinthoides is characterized by its medium-sized plants (40–60 cm tall), and differs of K. carraoënsis by an inflorescence shorter than half the length of the leaf blade and arched vs. subequal in size of leaf blade and erect, flowers yellow vs. whitish to yellow, petals with distal margin slightly entire vs. erose, lip lateral lobes with margin erose vs. entire, lip midlobe longer than lateral lobes vs. shorter, and lateral lobes of clinandrium not extending beyond midlobe vs. extending.

Nomenclatural notes:—A neotype was chosen for Koellensteinia hyacinthoides because the type specimen was destroyed.

Figures

FIGURE 6. A. Koellensteinia carraoënsis. B. Koellensteinia graminea. C. Koellensteinia hyacinthoides. D. Koellensteinia florida, plant in situ. E. Manually opened flower of K. eburnea. F. Flower. G. Plant in situ. H. Koellensteinia tricolor. A – C. By K. Senghas, available through Swiss Orchid Foundation at Herbarium Jeny Renz. D – E. Meneguzzo 861 (RB). F – G. Meneguzzo 973 (RB). D – G. By Thiago E. C. Meneguzzo. H. Pessoa 1152 (RB), by Edlley M. Pessoa.