Pleurothallis unguicallosa Ames & C.Schweinf. 1930 SUBGENUS Acianthera SECTION Brachystachyae Lindley 1859 Drawing and Collection sheet by Ames & Schweinfurth and The Harvard Botanical Website


Common Name The Clawed Pleurothallis [refers to the prominent callous at the apex of the lip]

Flower Size .2" [5 mm]

Found on Socorro Island in the Revillagigendo Archipelago to the west of Mexico in the Pacific on tree trunks on the eastern slope at elevations of 800 to 1000 meters as a mini-miniature sized, warm to cool growing epiphyte with straight to slightly arcuate, terete, slightly dilated towards the apex ramicauls enveloped by 2, tubular, obtuse, scarious sheaths and carrying a single, apical, deflexed in respect to the stem, elliptic to lanceolate-elliptic, acute-acuminate, tridenticulate apically, slightly canaliculate below into the sessile base leaf that blooms in the summer through later spring on 1 to 4, shorter than the leaf, terete, almost simultaneous, 3 to 6 flowered inflorescence with obliquely funnel-shaped, obtuse, shortly apiculate floral bracts.

Synonyms Acianthera unguicallosa (Ames & C.Schweinf.) Solano 2002 publ. 2003; Ogygia unguicallosa (Ames & C.Schweinf.) Luer 2006

References W3 Tropicos, Kew Monocot list , IPNI ; Icones Orchidacearum Plate 512 Hagsater & Soto 2002 as Acianthera unguicallosa drawing fide Icones Pleurothallidinarum Vol XXVIII Luer 2006 as Ogygia unguicallosa drawing fide