• oaxacana

• oblivata
• obscura => Excluded taxa

• occulta
• Octopus plant

• odorata => tafiensis

• oerstediana

• oligantha => Vriesea oligantha, Vriesea corcovadensis
• oliveirae
• olmosana
• olmosana var. pachamamae

• oranensis => didisticha
• orbicularis
• organensis
• orizabensis => Pseudalcantarea viridiflora
• orogenes
• oropezana
• oroyensis
• oroyensis var. secundiflora
• ortgiesiana
• orthiantha => Racinaea adpressa subsp. orthiantha
• orthorhachis => elongata var. subimbricata

• osyana => Excluded taxa

• ovatispicata

• oxapampae
• oxysepala => latifolia