Pleurothallis caucensis Mark Wilson 2017 SUBGENUS Pleurothallis SECTION Pleurothallis SUBSECTION Macrophyllae-Racemosae [Lindl] Luer 1986

Drawing of Comparison of lips

Drawings by C A Luer

Inflorescence and Closeup

Photo by David Haelterman C A Luer

Part Shade Cool Winter

Common Name The Cauca Pleurothallis

Flower Size .8 to 1.2" [2 to 3 cm]

Found in Cauca department of Colombia in montane forests amongst dead leaves at elevations around 1800 meters as a large sized, cool growing terrestrial with spreadig, terete ramicauls provided with a basal and a mid sheath and carrying a single, apical, suberect becoming pendent, ovate, acuminate, entire, cuneate bwlo into the base leaf that blooms in the winter on a pendent, arising through a recliningspathe, [11.5 to 16.3 cm] long, 3 to 8 flowered inflorescence with infundibular, shorter than the ovary floral bract and carrying non-resupinate .

"Pleurothallis caucensis can be distinguished from P. bicornis by the petals, which in P. caucensis are free, projected laterally and downward and in P. bicornis are adpressed and project forwards; by the lip which is completely fimbriated in P. caucensis and only fimbriated on the margin of the central lobe in P. bicornis; and by the lateral lobes of the lip which are flattened and surpass the column in P. caucensis and which are auriculate, not surpassing the column in P. bicornis. Pleurothallis caucensis differs from P. subreniformis in the length of the raceme, sepals and petals, which are longer in P. caucensis than in P. subreniformis; and in the lip shape, which is suborbicular in P. caucensis and hippocrepiform with an acute apex on the midlobe in P. subreniformis. Pleurothallis caucensis differs from P. torrana in the length of the ramicauls, raceme, sepals and petals, all of which are longer in P. caucensis than in P. torrana in the lip shape which is suborbicular in P. caucensis and rhombiform in P. torrana; and in the lip callus, which consists of a pair of lunate calli in P. caucensis and a single transverse callus in P. torrana." Wilson etal 2017

Synonyms

References W3 Tropicos, Kew Monocot list , IPNI ; *LANKESTERIANA 17(2): 122 Wilson 2017 drawing/photo fide

----------------------------------------------------------------------------------------------------------