Pleurothallis ruizii [Damian] in ed. SUBGENUS Acianthera [Scheidw.] Luer 1986
Photo by © Alexander Damian
TYPE drawing by © Greta Damian and Brittonia 70: 73 2017 Acianthera rodolfo-vasquezii and A. ruizii, spp. nov. (Orchidaceae: 3 Pleurothallidinae) from the montane cloud forest of the central Andes, Peru
Common Name Marlen's Pleurothallis [Senior authors matenal family name]
Flower Size .2" [5 mm]
Found in Oxapampa department of Peru in dwarf forests at elevations around 2000 meters as a small sized, cool to cold growing, caespitose epiphyte with erect, sub-oblique, sharply winged, broader at the junction with the leaf ramicaul enclosed above the base by a thin tubular sheath and carrying a single, apical, erect, coriaceous, narrowly elliptical, acute, with the margins continuous with the wings of the ramicaul, sessile base leaf that blooms in the fall and winter on a borne from the apex of the ramicaul at the base of the leaf, subtended by a thin spathe, peduncle .08" [2 mm] long, congested, .16" [4 mm] long overall, successively single, 2 flowered inflorescence with inflated floral bracts.
"Acianthera ruizii is most similar to P tokachii Luer from which it is distinguished by the green-yellowish to dark reddish flowers (vs. dark brown), petals with a prominent longitudinal carina along one margin above the middle (vs. none), and ovate lip, with the sides not deflexed and a pair of low calli extending from above the basal lobes to the apex (vs. ovoid lip, strongly deflexed sides and with a pair of tall calli extending to the middle third of the lamina), ovary smooth (vs. pubescent) and column pubescent (vs. smooth).
Synonyms *Acianthera ruizii Damian 2017
References W3 Tropicos, Kew Monocot list , IPNI ;
* Brittonia 70: 73 2017 Acianthera rodolfo-vasquezii and A. ruizii, spp. nov. (Orchidaceae: 3 Pleurothallidinae) from the montane cloud forest of the central Andes, Peru as Acianthera ruizii Drawing/photo fide
Anales Jard. Bot. Madrid 75(1)e069: 13 2018 A taxonomic synopsis of Acianthera (Orchidaceae: Pleurothallidinae) in Peru, including two new species Damian, Chiron and Mitidieri 2018 as Acianthera ruizii; Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera Uribe 2020 as Acianthera ruizii photo fide;
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