Dryadella Luer, Selbyana, 1978

Karremans, Adam P., Albertazzi, Federico J., Bakker, Freek T., Bogarín, Diego, Eurlings, Marcel C. M., Pridgeon, Alec, Pupulin, Franco & Gravendeel, Barbara, 2016, Phylogenetic reassessment of Specklinia and its allied genera in the Pleurothallidinae (Orchidaceae), Phytotaxa 272 (1), pp. 1-36 : 28

Dryadella Luer, Selbyana 2(2–3): 207. 1978. Type:— Masdevallia elata Luer, Phytologia 39(4): 199. 1978.

Syn. Trigonanthe (Schltr.) Brieg., Die Orchidee 448. 1975, nom. inval. (based on a nomen nudum). Masdevallia subgen. Trigonanthe Schltr. , nom. nud. (lacks a Latin description). Type: Masdevallia simula Rchb.f., Gard. Chron. 1: 8. 1875 [lectotype designated by Luer (1986)]

Syn. Incaea Luer, Monogr. Syst. Bot. Missouri Bot. Gard. 105: 87. 2006. Type: Pleurothallis yupanki Luer & R.Vásquez, Phytologia 55(3): 203. 1984.

Dryadella as defined by Luer (2005) and Pridgeon (2005) is retained. As such it includes 55 species, distributed from Mexico to Bolivia and Brazil, through Central America. They are absent from the Antilles. Vegetatively they are tufted little plants with narrow fleshy leaves. The flowers are frequently yellowish spotted with brown or purple. The sepals are caudate, and connate basally. The lip is bicallous, and hinged to the column foot by a slender claw. The column is broadly winged, with a ventral anther and stigma. The pollinia are “whale-tail” type, with a pair of flat caudicles. The genus is here modified only by the inclusion of the following species: