SECTION Articulatum Dalstrom 2020
"Pseudobulbs generally but not always with 2 apical leaves, sometimes mottled or spotted with brown or purple, Flowers qith yellow, brown or white sepals and lip, frequently spotted or marked in contrasting colors, lip attached to the base and for short distances along the ventral and lateral flanks of the column, creating a tube-like structure, then free with a short and flat strap like tissue [a claw or unguis] functioning as a hinge and allowing the distinctly angled front lamina to be articulate [flexible] without breaking the attachment when pressed downwards, column with the lower part in the same horizontal plane as the ovary and then more or less curved towards the lip, column generally but not always with distinct and variable apical wings and an undivided stigma." Dalstrom, Higgins & Deburghgraeve 2020
Section nominal Type species = ! = Odontoglossum epidendroides Kunth 1816
SECTION Auriculatum SERIES Crispum Dalstrom 2020
Flowers snow white, or flushed purple, with or without purple to brown spots on the floral segments, rarely with larger purple to brown markings [suggesting hybrid origin] and with deep yellow on and around the lip callus
Series Type species = ! = Odontoglossum crispum Lindley 1845
SECTION Auriculatum SERIES Cruentum Dalstrom 2020
Flowers with no wings or rudimentary broad but very short wings marked with brown, not distinctly exceeding beyond the stigmatic edges of the [.4 to .6" [10 to 15 mm] long column.
Series Type species = ! = Odontoglossum cruentum Rchb. f. 1870
SECTION Auriculatum SERIES Cristatum Dalstrom 2020
Flowers with distincly fimbriate to deeply lacerate, furcated to triangular or broadly rhombic to rectangular column wings and with widely spreading, well developed lip callus of white or yellow, curved and more or less acuminate keels, streaked with red, brown or purple, much covering the basal half of the lip.
Series Type species = ! = Odontoglossum cristatum Lindl. 1844
SECTION Auriculatum SERIES Hunnewellianum Dalstrom 2020
Flowers with .48 to .52" [12 to 13 mm] long column, and a lip lacking basal callus keels altogether but with a single, well developed central pair of diverging denticulate keels." Dalstrom 2020
Series Type species = ! = Odontoglossum hunnewellianum Rolfe 1889
SECTION Auriculatum SERIES Subuligerum Dalstrom 2020
Flowers generally witha pandurate lip lamina and a .6 to .72" [15 to 18 mm] long column with a uniquely enlarged loble on the dorsal side of the narroly rostrate anther, which extends distincly above the dorsal surface of the column. Dalstrom 2020
Series Type species = ! = Odontoglossum subuligerum Rchb.f. 1876
SECTION Auriculatum SERIES Epidendroides Dalstrom 2020
Flowers with columns .6 to 1" [15 to 25 mm] long, generally but not always with the dominating central, entire pair of diverging keels accompanied by broad sets of erect to spreading commonly much smaller but sometimes elongated subulate to tendril like filamentose denticles or keels." Dalstrom 2020
Series Type species = ! = Odontoglossum epidendroides Kunth 1816
References W3 Tropicos, Kew Monocot list , IPNI ; The Odontoglossum Story Dalstrom, Higgins & Deburghgraeve 2020
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