| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| GYAC4 | Gymnocolea acutiloba (Schiffn.) Müll. Frib. | | Jungermanniaceae
|
| GYBO | Gymnocolea borealis (Frisvoll & Moen) R. M. Schust. | | Jungermanniaceae
|
| GYFA | Gymnocolea fascinifera Potemk. | | Jungermanniaceae
|
| GYINH | Gymnocolea inflata (Huds.) Dumort. var. heterostipa (Carrington & Spruce) Müll. Frib. | | Jungermanniaceae
|
| GYINI | Gymnocolea inflata (Huds.) Dumort. var. inflata | | Jungermanniaceae
|
| GYIN5 | Gymnocolea inflata (Huds.) Dumort. | | Jungermanniaceae
|
| GYMNO8 | Gymnocolea (Dumort.) Dumort. | | Jungermanniaceae
|
| GYLI | Gymnoderma lineare (A. Evans) Yoshim. & Sharp | | Cladoniaceae
|
| GYMNO11 | Gymnoderma Nyl. | gymnoderma | Cladoniaceae
|
| GYHIC | Gymnolomia hispida (Gray) Robins. & Greenm. var. ciliata Robins. & Greenm. | Heliomeris ciliata | Asteraceae
|
| GYHI2 | Gymnolomia hispida (Gray) Robins. & Greenm. | Heliomeris hispida | Asteraceae
|
| GYLO | Gymnolomia longifolia Robins. & Greenm. | Heliomeris longifolia var. longifolia | Asteraceae
|
| GYAP2 | Gymnomitrion apiculatum (Schiffn.) Müll. Frib. | | Gymnomitriaceae
|
| GYCO2 | Gymnomitrion concinnatum (Lightf.) Corda | | Gymnomitriaceae
|
| GYCO3 | Gymnomitrion corallioides Nees | | Gymnomitriaceae
|
| GYLA3 | Gymnomitrion laceratum (Steph.) Horik. | | Gymnomitriaceae
|
| GYMU4 | Gymnomitrion mucrophorum R. M. Schust. | | Gymnomitriaceae
|
| GYOB | Gymnomitrion obtusum (Lindb.) Pears. | | Gymnomitriaceae
|
| GYPA5 | Gymnomitrion pacificum Grolle | | Gymnomitriaceae
|
| GYMNO9 | Gymnomitrion Corda nom. cons. | | Gymnomitriaceae
|
| GYAM | Gymnopogon ambiguus (Michx.) B.S.P. | bearded skeletongrass | Poaceae
|
| GYBR | Gymnopogon brevifolius Trin. | shortleaf skeletongrass | Poaceae
|
| GYCH | Gymnopogon chapmanianus A.S. Hitchc. | Chapman's skeletongrass | Poaceae
|
| GYFL | Gymnopogon floridanus Swallen | Gymnopogon chapmanianus | Poaceae
|
| GYFO | Gymnopogon foliosus (Willd.) Nees | leafy skeletongrass | Poaceae
|
| GYMNO3 | Gymnopogon Beauv. | skeletongrass | Poaceae
|
| GYHI | Gymnopteris hispida (Mett. ex Kuhn) Underwood | Bommeria hispida | Pteridaceae
|
| GYGE | Gymnosiphon germainii Urban | Gymnosiphon niveus | Burmanniaceae
|
| GYNI | Gymnosiphon niveus (Griseb.) Urban | Puerto Rico yellowseed | Burmanniaceae
|
| GYSP | Gymnosiphon sphaerocarpus Urban | mountain yellowseed | Burmanniaceae
|
| GYMNO4 | Gymnosiphon Blume | yellowseed | Burmanniaceae
|
| GYGL | Gymnosperma glutinosum (Spreng.) Less. | gumhead | Asteraceae
|
| GYMNO6 | Gymnosperma Less. | gymnosperma | Asteraceae
|
| GYNUP | Gymnosteris nudicaulis (Hook. & Arn.) Greene var. pulchella (Greene) Brand | Gymnosteris nudicaulis | Polemoniaceae
|
| GYNU | Gymnosteris nudicaulis (Hook. & Arn.) Greene | nakedstem gymnosteris | Polemoniaceae
|
| GYPA2 | Gymnosteris parvula Heller | smallflower gymnosteris | Polemoniaceae
|
| GYMNO5 | Gymnosteris Greene | gymnosteris | Polemoniaceae
|
| GYOR | Gymnostomiella orcuttii Bartr. | Orcutt's gymnostomiella moss | Pottiaceae
|
| GYMNO12 | Gymnostomiella Fleisch. | gymnostomiella moss | Pottiaceae
|
| GYAE | Gymnostomum aeruginosum Sm. | gymnostomum moss | Pottiaceae
|
| GYAN5 | Gymnostomum angustifolium Saito | Tuerckheimia angustifolia | Pottiaceae
|
| GYCA3 | Gymnostomum calcareum Nees & Hornsch. in Nees et al. | calcareous gymnostomum moss | Pottiaceae
|
| GYCU | Gymnostomum curvirostre Hedw. ex Brid. | Hymenostylium recurvirostre | Pottiaceae
|
| GYIN3 | Gymnostomum insigne (Dix.) A. J. E. Sm. | Hymenostylium insigne | Pottiaceae
|
| GYLA2 | Gymnostomum latifolium (Zett.) Flow. in Crum | Hymenostylium recurvirostre | Pottiaceae
|
| GYREC | Gymnostomum recurvirostre Hedw. var. commutatum (Mitt.) Grout | Hymenostylium recurvirostre | Pottiaceae
|
| GYREL | Gymnostomum recurvirostre Hedw. var. latifolium Zett. | Hymenostylium recurvirostre | Pottiaceae
|
| GYRES | Gymnostomum recurvirostre Hedw. var. scabrum (Lindb.) Grout | Hymenostylium recurvirostre | Pottiaceae
|
| GYRE70 | Gymnostomum recurvirostre Hedw. | Hymenostylium recurvirostre | Pottiaceae
|
| GYTE2 | Gymnostomum tenue Hedw. | Gyroweisia tenuis | Pottiaceae
|
| GYMNO10 | Gymnostomum Nees & Hornsch. in Nees et al. | gymnostomum moss | Pottiaceae
|
| GYAN | Gymnostyles anthemifolia Juss. | button burrweed | Asteraceae
|
| GYNA | Gymnostyles nasturtiifolia auct. non Juss. | Gymnostyles stolonifera | Asteraceae
|
| GYST | Gymnostyles stolonifera (Brot.) Tutin | carpet burrweed | Asteraceae
|
| GYMNO7 | Gymnostyles Juss. | burrweed | Asteraceae
|
| GYGY | Gynandropsis gynandra (L.) Briq. | Cleome gynandra | Capparaceae
|
| GYSA | Gynerium sagittatum (Aubl.) Beauv. | wildcane | Poaceae
|
| GYNER | Gynerium Willd. ex Beauv. | wildcane | Poaceae
|
| GYAX | Gynotroches axillaris Blume | | Rhizophoraceae
|
| GYNOT | Gynotroches Blume | | Rhizophoraceae
|
| GYAU | Gynura aurantiaca (Blume) DC. | velvetplant | Asteraceae
|
| GYNUR | Gynura Cass. | gynura | Asteraceae
|
| GYAC | Gypsophila acutifolia Stev. ex Spreng. | sharpleaf babysbreath | Caryophyllaceae
|
| GYAR2 | Gypsophila arrostii Guss. | Arrost's babysbreath | Caryophyllaceae
|
| GYEL | Gypsophila elegans Bieb. | showy babysbreath | Caryophyllaceae
|
| GYMU | Gypsophila muralis L. | low babysbreath | Caryophyllaceae
|
| GYOL | Gypsophila oldhamiana Miq. | Oldham's babysbreath | Caryophyllaceae
|
| GYPA | Gypsophila paniculata L. | babysbreath gypsophila | Caryophyllaceae
|
| GYPE | Gypsophila perfoliata L. | perfoliate babysbreath | Caryophyllaceae
|
| GYPI | Gypsophila pilosa Huds. | Turkish babysbreath | Caryophyllaceae
|
| GYPO | Gypsophila porrigens (L.) Boiss. | Gypsophila pilosa | Caryophyllaceae
|
| GYRE | Gypsophila repens L. | creeping babysbreath | Caryophyllaceae
|
| GYSC | Gypsophila scorzonerifolia Ser. | garden babysbreath | Caryophyllaceae
|
| GYPSO | Gypsophila L. | babysbreath | Caryophyllaceae
|
| GYMA | Gypsoplaca macrophylla (Zahlbr.) Timdal | | Gypsoplaceae
|
| GYPSO2 | Gypsoplaca Timdal | gypsoplaca | Gypsoplaceae
|
| GYAN3 | Gyrophora angulata (Tuck.) Herre | Umbilicaria angulata | Umbilicariaceae
|
| GYAN4 | Gyrophora anthracina (Wulfen) Korber | Umbilicaria rigida | Umbilicariaceae
|
| GYAR | Gyrophora arctica Ach. | Umbilicaria arctica | Umbilicariaceae
|
| GYCY | Gyrophora cylindrica (L.) Ach. | Umbilicaria cylindrica | Umbilicariaceae
|
| GYDE | Gyrophora decussata (Vill.) Zahlbr. | Umbilicaria decussata | Umbilicariaceae
|
| GYDE2 | Gyrophora deusta (L.) Ach. | Umbilicaria deusta | Umbilicariaceae
|
| GYDI3 | Gyrophora dillenii (Tuck.) Mull. Arg. | Umbilicaria mammulata | Umbilicariaceae
|
| GYER2 | Gyrophora erosa (G. Weber) Ach. | Umbilicaria torrefacta | Umbilicariaceae
|
| GYHY2 | Gyrophora hyperborea Ach. | Umbilicaria hyperborea var. hyperborea | Umbilicariaceae
|
| GYMU2 | Gyrophora muehlenbergii Ach. | Umbilicaria muehlenbergii | Umbilicariaceae
|
| GYPH | Gyrophora phaea (Tuck.) Nyl. | Umbilicaria phaea | Umbilicariaceae
|
| GYPO2 | Gyrophora polyphylla (L.) Fink | Umbilicaria polyphylla | Umbilicariaceae
|
| GYPO3 | Gyrophora polyrrhiza (L.) Korber | Umbilicaria polyrrhiza | Umbilicariaceae
|
| GYVE | Gyrophora vellea (L.) Ach. | Umbilicaria vellea | Umbilicariaceae
|
| GYSC2 | Gyrostomum scyphuliferum (Ach.) Nyl. | | Graphidaceae
|
| GYROS | Gyrostomum Fr. | gyrostomum | Graphidaceae
|
| GYTI | Gyrotheca tinctoria (J.F. Gmel.) Salisb. | Lachnanthes caroliana | Haemodoraceae
|
| GYUN | Gyrothyra underwoodiana M. Howe | | Gyrothyraceae
|
| GYROT | Gyrothyra M. Howe | | Gyrothyraceae
|
| GYRE2 | Gyroweisia reflexa (Brid.) Schimp. | reflexed gyroweisia moss | Pottiaceae
|
| GYTE | Gyroweisia tenuis (Hedw.) Schimp. | gyroweisia moss | Pottiaceae
|
| GYROW | Gyroweisia Schimp. | gyroweisia moss | Pottiaceae
|
| HAAL | Habenaria alata Hook. | winged bog orchid | Orchidaceae
|
| HAAM4 | Habenaria amalfitana Lehmann & Kränzlin | Guadeloupe bog orchid | Orchidaceae
|
| HAAN2 | Habenaria ×andrewsii M. White | Platanthera andrewsii | Orchidaceae
|