Taxonomic studies in the Aganisia complex (Orchidaceae, Zygopetalinae)
Thiago E. C. Meneguzzo
José F. A. Baumgratz
Cássio Van Den Berg
Phytotaxa
2015
2015-12-09
238
1
1
39
3RBSX
Schlechter (1925: 126)
Schlechter
126
1925
[187,796,268,295]
Liliopsida
Orchidaceae
Koellensteinia
Plantae
Asparagales
19
20
Tracheophyta
species
hyacinthoides
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 hyacinthoidesis characterized by its medium-sized plants (40–60 cm tall), and differs of K. carraoënsisby 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 hyacinthoidesbecause the type specimen was destroyed.