GROUP Filamentosum
Characterized by thin, short, pendant stems arising from the previous stem carryring a single, persistent, apical, linear-lancelate, acuminate leaf [the juvenile stem has several leaves] and an apical, short, racemose inflroescence and has successive, fleshy, narrowly 3 lobed, margin of the laterla lobes dentate to ciliate, the anther is narrowly ovoid and long surpasses the apex of the column.
References W3 Tropicos, Kew Monocot list , IPNI ; Icones Orchidacearum Vol 12 Plate 1242 Hagsater & Sanchez 2009 see recognition section;