GROUP Polythallum
Characterized by by the much branched stems, with a tall primary stem, numerous secondary and tertiary stems and the numerous shorter flowers stems, the nodding inflorescence bears only 3-4 pale yellow flowers, lip wine-red except for the calli and apices of the lobes which are pale yellow, sepals connate at base, narrowly oblanceolate, petals linear, obliquely acute at the apex, lip deeply 3-lobed, with 5 parallel ribs on the disc and a pair of radiating shorter ribs on the lateral lobes which are obliquely triangular.
References W3 Tropicos, Kew Monocot list , IPNI ; Icones Orchidacearum 15 [2] Plate 1593 Hagsater & Sanchez 2016 see recognition section; Icones Orchidacearum 16[1] Plate 1637 Hagsater 2018 See recognition section
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