Aa rosei Ames 1922 Photo by Mihai Costea and The Laurier Website

Common Name The Rose's Aa [American Original Collectors of species 1900's]

Flower Size minute

Found in Peru at elevations around 3400 to 4100 meters as a medium sized, cold growing terrestrial with a stem enveloped completely by numerous, imbricating, tubular-cylindric, long-acuminate, reflexed, hyaline sheaths apparently leafless at blooming or with a separate cluster of several small, narrowly lanceolate to elliptic-lanceolate, dark green, leatherym petiolate base leaves that blooms on a terminal, erect, rachis [1.8" [4.5 cm] long, tomentose cylindric, densely many flowered inflorescence with ovate-triangular to triangular-lanceolate, acute, white hyaline, about as long as the non-resupinate flowers floral bracts.

Synonyms Altensteinia rosei (Ames) L.O.Williams 1939

References W3 Tropicos, Kew Monocot list , IPNI ; Orchids of Peru Vol 1 Schweinfurth 1958 as Altensteinia rosei; Macchu Picchu; Orchids Christenson 2003