• macbrideana
• macbrideana var. atroviolacea
• macbrideana var. longifolia
• macbrideana var. longispica
• macbrideana var. macbrideana => macbrideana
• macbrideana var. major
• macdougallii
• machupicchuensis
• macrantha => Racinaea macrantha
• macrochlamys
• macrocnemis => xiphioides
• macrodactylon
• macropetala => Pseudalcantarea macropetala
• macropoda => Vriesea incurvata
• macrostachya => fasciculata var. uncispica
• maculata
• macvaughii
• magna Ekman and Harms => paniculata
• magna => Guzmania megastachya
• magnispica
• magnusiana Wittm.
• magnusiana sensu L. B. Smith => plumosa
• makoyana
• makrinii
• mallemontii
• malyi
• malzinei
• Manatee River airplant
• mandonii
• manzanaresii => Racinaea lutheri
• mantiqueirae
• manzanilloensis
• marabascoensis
• marantoidea => Guzmania marantoidea
• marcalaensis => excelsa
• x marceloi
• marconae
• marioportillae => Racinaea marioportillae
• maritima => roland-gosselini
• markusii
• marnier-lapostollei
• martinicensis => Guzmania plumieri
• mateoensis
• mathewsii => humilis
• matudae
• mauryana
• mauryana f. secundifolia => secundifolia
• maxima Lillo and Hauman => australis
• maxima Strangew => Aechmea bracteata
• maxima var. densior => australis
• maxoniana => Vriesea maxoniana
• x maya
• x may-patii
• mazatlanensis

• Medusa's head
• megastachya => Guzmania megastachya
• melanocrater
• melanopus => punctulata or melanocrater
• membranacifolia => Racinaea membranacifolia
• mereliana
• meridionalis Baker => ixioides
• meridionalis L. B. Smith etc. => recurvifolia
• meridionalis Mez => pohliana
• meridionalis var. subsecundifolia => recurvifolia var. subsecundifolia
• mexiae => bourgaei
• mexicana => dugesii
• Mexican black torch
• mezii => Racinaea seemannii

• micans
• michelii => Racinaea michelii
• micrantha => Racinaea spiculosa var. micrantha
• microrachis => Excluded taxa
• microxiphion => aeranthos
• milagrensis
• mima
• mima var. chiletensis
• mima var. mima => mima
• minasgeraisensis
• miniatispica => cryptopoda
• minor => divaricata
• minuta => usneoides
• minutiflora
• mirabilis
• mitlaensis
• mitlaensis var. tulensis
• mixtecorum

• modesta => foliosa
• molleriana => Excluded taxa
• mollis
• mollis var. reptans
• monadelpha => Lemeltonia monadelpha
• monobotrya => Lemeltonia monadelpha
• monostachia => Guzmania monostachia forma monostachia
• monostachya Bartram => stricta
• monostachya Bartram => setacea
• monostachya Vaillant ex Baker => stricta
• monostachys => recurvata
• monstrum => Jagrantia monstrum
• montana
• monticola => Racinaea monticola
• 'Moonlight', Hybrid
• mooreana
• moreliana => Excluded taxa
• moritziana => variabilis
• moronesensis
• morreniana => Wallisia cyanea
• morrenii => Vriesea morrenii
• mosaica => Excluded taxa
• moscosoi

• mucronata => Guzmania mucronata
• muhriae
• muhrii => zecheri var. cafayatensis
• multicaulis
• multiflora => Racinaea multiflora
• multiflora var. decipiens => Racinaea decipiens
• multiflora var. multiflora => Racinaea multiflora var. multiflora
• multiflora var. tomensis => Racinaea decipiens var. tomensis
• multifolia => turneri var. orientalis
• murorum => latifolia
• musaica => Guzmania musaica
• muscoides => usneoides

• myosura Griseb. ex Baker
• myosura Griseb. => caliginosa
• myosura var. saxicola => tenebra
• myriantha
• myriophylla => bartramii
• 'Mystic Haze'