Byrsella (burr-SELL-ah) is distinguished by coarse, caespitose plants with thickly coriaceous leaves borne by shorter, stout ramicauls and a single-flowered peduncle round in cross section.  The sepals are usually thick, fleshy and variously form a cup or tube, often verrucose within.  The ovary is smooth.  The petals are like cartilage without a prominent descending process but the part closest to the lip is often obtusely angled.  The lip is thick, more or less oblong and undivided by lateral folds with a verrucose tip (with rare exceptions). Species in this genus used to be a part of Masdevallia section Coriaceae.

   Byrsella angulata (Rchb.f.) Luer

   Byrsella anomala (Luer & Sijm) Luer

   Byrsella atuahalpa (Luer) Luer

   Byrsella belua (Königer & D'Alessandro) Luer

   Byrsella bonplandii (Rchb.f.) Luer

   Byrsella bourdetteana (Luer) Luer

   Byrsella cacodes (Luer & R.Escobar) Luer

   Byrsella caesia (Roezl) Luer

   Byrsella campyloglossa (Rchb.f.) Luer

   Byrsella civilis (Rchb.f. & Warsz.) Luer

   Byrsella colossus (Luer) Luer

   Byrsella coriacea (Lindl.) Luer

   Byrsella elephanticeps (Rchb.f. & Warsz.) Luer

   Byrsella foetens (Luer & R.Escobar) Luer

   Byrsella fractiflexa (Lehm. & Kraenzl.) Luer

   Byrsella fragrans (Woolward) Luer

   Byrsella gargantua (Rchb.f.) Luer

   Byrsella hylodes (Luer & R.Escobar) Luer

   Byrsella hystrix (Luer & Hirtz) Luer

   Byrsella lappifera (Luer & Hirtz) Luer

   Byrsella leontoglossa (Rchb.f.) Luer

   Byrsella lilianae (Luer) Luer

   Byrsella macroglossa (Luer) Luer

   Byrsella maloi (Luer) Luer

   Byrsella misasii (Braas) Luer

   Byrsella mooreana (Rchb.f.) Luer

   Byrsella murex (Luer) Luer

   Byrsella oscarii (Luer & R.Escobar) Luer

   Byrsella pachyantha (Rchb.f.) Luer

   Byrsella pachysepala (Rchb.f.) Luer

   Byrsella pardina (Rchb.f.) Luer

   Byrsella peristeria (Rchb.f.) Luer

   Byrsella picea (Luer) Luer

   Byrsella platyglossa (Rchb.f.) Luer

   Byrsella rigens (Luer) Luer

   Byrsella sanctae-rosae (Kraenzl.) Luer

   Byrsella semiteres (Luer & Escobar) Luer

   Byrsella spilantha (Königer) Luer

   Byrsella sumapazensis (P.Ortiz) Luer

   Byrsella torta (Rchb.f.) Luer

   Byrsella velella (Luer) Luer

   Byrsella velifera (Rchb.f.) Luer

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