
Microchilus arietinus (Rchb.f. & Warm.) Ormerod 2002
Photo by Dalton Holland Baptista
Photo by Nicolás Gutiérrez Morales and Comparative vegetative anatomy of Neotropical Goodyerinae Klotzsch (Orchidaceae Juss.: Orchidoideae Lindl.)
Drawing by A Krol/Dodson and Materials to the Orchid Flora of Colombia Vol 1: 300 Szlachetko & Kolanowska 2017

LATER
EARLY
Common Name The Ram-Like Microchilus [refers to the shape of the lip apex]
Flower Size .2" [5 mm]
Found in Venezuela, Brazil, Ecuador, Peru, Bolivia and northern Argentina in rain or cloud forests at elevations of 400 to 1500 meters as a small sized, hot to cool growing terrestrial with sometimes white variegated green, reticulated, elliptic, acute, gradually narrowing below into the petiolate base leaves that blooms in the summer to early fall on a terminal, erect, 8" [20 cm] long, fairly dense, several to many flowered inflorescence with lanceolate, acuminate, subpellucid, as long as the ovary floral bracts and carrying small, white or pinkish, pilose flowers
M arientinus is very similar to M constrictus but it has an oblong-ligulate hypochile and the sepals are glandular.
Synonyms Erythrodes arietina (Rchb.f. & Warm.) Ames 1922; Physurus arietinus Rchb.f. & Warm. 1881; Physurus micranthus Kraenzl. 1921
References W3 Tropicos, Kew Monocot list , IPNI ;
Otia Botanica Hamburgensia: 82 Rchb.f 1881 as Physurus arientinus;
Ark. Bot. 16(8): 2 Kraenzlin 1921 as Physurus micranthus
Studies in the family Orchidaceae Vol VII: 66 Ames 1922 as Erythrodes arietina;
Flora Brasilica Vol XII II 13-43: 350 Hoehne 1945 as Physurus arietinus
Flora Brasilica Vol XII II 13-43: tab 189 Hoehne 1945 as Physurus arietinus drawing ok;
Orchids of Peru Vol 1 Schweinfurth 1958 as Erythrodes arietina;
Flora de Venezuela Foldats Volumen XV Part 1 1969 as Erythrodes arietina drawing ok;
Orchidaceae Brasilensis Vol 1: 131 Pabst & Dungs 1975 as Erythrodes arietina
Orchidaceae Brasilensis Vol 1: 287 fig 511 Pabst & Dungs 1975 as Erythrodes arietina drawing good;
Icones Planetarum Tropicarum Series II Orchids of Bolivia plate 0339 Dodson & Vasquez 1989 as Erythrodes arietina drawing fide;
* Lindleyana 17: 214 Ormerod 2002
Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 as Erythrodes arietina drawing fide;
Orchids of the Department of Valle del Cauca Vol 1 Kolanowski & Szlachetko 2012 drawing/photos fide;
Orchidees du Bresil As Orquideas da Serra Do Castelo Vol 1 Chiron & Bolsanello 2015 drawing good;
Materials to the Orchid Flora of Colombia Vol 1: 300 Szlachetko & Kolanowska 2017 drawing fide
Materials to the Orchid Flora of Colombia Vol 1: 542 pl 104-105 Szlachetko & Kolanowska 2017 Photo fide
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