The new Refugium Botanicum. Trigonidium lankesteri

Abstract

Trigonidium lankesteri Ames, Schedulae Orchidianae 5: 32–34. 1923. Maxillaria luisae Molinari, Richardiana 15:302. 2014 [2015]. Type: Costa Rica: Las Cóncavas, in cultivation, February 1923, C.H. Lankester 367 (holotype AMES). Trigonidium amparoanum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 19:61 1923 (type: Costa Rica. San José: Carillo [Carrillo], blühend im Juni 1921, C. Wercké 26, destroyed in B).

Epiphytic, repent, large herb up to 1 m tall. Rhizome cylindrical, 5–8 mm in diameter, 9–13 cm long between pseudobulbs, completely covered by closely appressed, tubular, obtuse, brown, papyraceous bracts ca. 2 cm long. Roots produced at the base of the pseudobulbs, ca 1.5 mm in diameter. Pseudobulbs ovoid, slightly compressed, yellow–green, deeply sulcate when old, up to 8 × 3 cm, subtended by rigid imbricating sheaths, apically three- to five-leaved.