| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| JABE | Jacquinia berteroi Spreng. | bois bande | Theophrastaceae
|
| JAKE | Jacquinia keyensis Mez | joewood | Theophrastaceae
|
| JAPA3 | Jacquinia pauciflora B. St�hl & F. Axelrod | | Theophrastaceae
|
| JARE2 | Jacquinia revoluta auct. non Jacq. | Jacquinia armillaris | Theophrastaceae
|
| JAST | Jacquinia stenophylla Urban | thicketwood | Theophrastaceae
|
| JAUM | Jacquinia umbellata A. DC. | chirriador | Theophrastaceae
|
| JACQU2 | Jacquinia L. | jacquinia | Theophrastaceae
|
| JAGL | Jacquiniella globosa (Jacq.) Schlechter | redblotch tufted orchid | Orchidaceae
|
| JAMI2 | Jacquiniella miserrima (Reichenb. f.) Stehl� | Epidendrum miserrimum | Orchidaceae
|
| JATE | Jacquiniella teretifolia (Sw.) Britt. & Wilson | moss tufted orchid | Orchidaceae
|
| JACQU3 | Jacquiniella Schlechter | tufted orchid | Orchidaceae
|
| JASC | Jaegerina scariosa (Lor.) Arzeni | jaegerina moss | Pterobryaceae
|
| JAEGE | Jaegerina C. M�ll. | jaegerina moss | Pterobryaceae
|
| JASQ | Jaegerinopsis squarrosa Britt. | Jaegerina scariosa | Pterobryaceae
|
| JARA | Jaffueliobryum raui (Aust.) Th�r. | jaffueliobryum moss | Grimmiaceae
|
| JAWR | Jaffueliobryum wrightii (Sull. in Gray) Th�r. | Wright's jaffueliobryum moss | Grimmiaceae
|
| JAFFU | Jaffueliobryum Th�r. | jaffueliobryum moss | Grimmiaceae
|
| JAAN | Jaltomata antillana (Krug & Urban) D'Arcy | Antilles false holly | Solanaceae
|
| JAPR2 | Jaltomata procumbens (Cav.) J.L. Gentry | creeping false holly | Solanaceae
|
| JALTO | Jaltomata Schlecht. | false holly | Solanaceae
|
| JAJA2 | Jambosa jambos (L.) Millsp. | Syzygium jambos | Myrtaceae
|
| JAMA2 | Jambosa malaccensis (L.) DC. | Syzygium malaccense | Myrtaceae
|
| JAAMC2 | Jamesia americana Torr. & Gray ssp. californica (Small) E. Murr. | Jamesia americana var. rosea | Hydrangeaceae
|
| JAAMA | Jamesia americana Torr. & Gray var. americana | fivepetal cliffbush | Hydrangeaceae
|
| JAAMC | Jamesia americana Torr. & Gray var. californica (Small) Jepson | Jamesia americana var. rosea | Hydrangeaceae
|
| JAAMM | Jamesia americana Torr. & Gray var. macrocalyx (Small) Engl. | fivepetal cliffbush | Hydrangeaceae
|
| JAAMR | Jamesia americana Torr. & Gray var. rosea J.A. Purpus ex Schneid. | fivepetal cliffbush | Hydrangeaceae
|
| JAAMZ | Jamesia americana Torr. & Gray var. zionis N.& P. Holmgren | Zion cliffbush | Hydrangeaceae
|
| JAAM | Jamesia americana Torr. & Gray | fivepetal cliffbush | Hydrangeaceae
|
| JATE2 | Jamesia tetrapetala N.& P. Holmgren | fourpetal cliffbush | Hydrangeaceae
|
| JAMES | Jamesia Torr. & Gray | cliffbush | Hydrangeaceae
|
| JAAL | Jamesianthus alabamensis Blake & Sherff | Alabama warbonnet | Asteraceae
|
| JAMES2 | Jamesianthus Blake & Sherff | jamesianthus | Asteraceae
|
| JAAUA | Jamesoniella autumnalis (DC.) Steph. var. autumnalis | | Jungermanniaceae
|
| JAAUH | Jamesoniella autumnalis (DC.) Steph. var. heterostipa (A. Evans) Frye & L. Clark | | Jungermanniaceae
|
| JAAUM | Jamesoniella autumnalis (DC.) Steph. var. myriocarpa (Brinkm.) Frye & L. Clark | | Jungermanniaceae
|
| JAAUN | Jamesoniella autumnalis (DC.) Steph. var. nipponica (S. Hatt.) S. Hatt. | | Jungermanniaceae
|
| JAAU | Jamesoniella autumnalis (DC.) Steph. | | Jungermanniaceae
|
| JAUN2 | Jamesoniella undulifolia (Nees) M�ll. Frib. | | Jungermanniaceae
|
| JAMES3 | Jamesoniella (Spruce) Carrington | | Jungermanniaceae
|
| JAMAA | Janipha manihot (L.) Kunth var. angustiloba Torr. | Manihot angustiloba | Euphorbiaceae
|
| JAMA3 | Janipha manihot (L.) Kunth | Manihot esculenta | Euphorbiaceae
|
| JAGR | Janusia gracilis Gray | slender janusia | Malpighiaceae
|
| JANUS | Janusia A. Juss. | janusia | Malpighiaceae
|
| JACA8 | Japewia carrollii (Coppins & P. James) Tonsberg | | Bacidiaceae
|
| JASU2 | Japewia subaurifera Muhr & Tonsberg | | Bacidiaceae
|
| JATO | Japewia tornoensis (Nyl.) Tonsberg | | Bacidiaceae
|
| JAPEW | Japewia Tonsberg | japewia | Bacidiaceae
|
| JAPL | Jarava plumosa (Spreng.) S.L.W. Jacobs & J. Everett | South American rice grass | Poaceae
|
| JARAV | Jarava Ruiz & Pav�n | rice grass | Poaceae
|
| JACH | Jarilla chocola Standley | Jarilla heterophylla | Caricaceae
|
| JAHE2 | Jarilla heterophylla (Cerv. ex Llave) Rusby | jarilla | Caricaceae
|
| JARIL | Jarilla Rusby | jarilla | Caricaceae
|
| JAIL | Jarixa ilicicola R. C. Harris | | Arthopyreniaceae
|
| JATH | Jarixa thelenula R. C. Harris | | Arthopyreniaceae
|
| JARIX | Jarixa R. C. Harris | jarixa | Arthopyreniaceae
|
| JAMO | Jasione montana L. | sheepbit | Campanulaceae
|
| JASIO | Jasione L. | jasione | Campanulaceae
|
| JAAZ | Jasminum azoricum auct. non L. | Jasminum fluminense | Oleaceae
|
| JADI2 | Jasminum dichotomum Vahl | Gold Coast jasmine | Oleaceae
|
| JAFL | Jasminum fluminense Vell. | jazmin de trapo | Oleaceae
|
| JAGR2 | Jasminum grandiflorum L. | Jasminum officinale | Oleaceae
|
| JAME | Jasminum mesnyi Hance | Japanese jasmine | Oleaceae
|
| JAMU2 | Jasminum multiflorum (Burm. f.) Andr. | star jasmine | Oleaceae
|
| JANI | Jasminum nitidum Skan | angelwing jasmine | Oleaceae
|
| JANU | Jasminum nudiflorum Lindl. | winter jasmine | Oleaceae
|
| JAOFG | Jasminum officinale L. var. grandiflorum (L.) Bailey | Jasminum officinale | Oleaceae
|
| JAOF | Jasminum officinale L. | poet's jasmine | Oleaceae
|
| JAPR4 | Jasminum primulinum Hemsley | Jasminum mesnyi | Oleaceae
|
| JAPU | Jasminum pubescens (Retz.) Willd. | Jasminum multiflorum | Oleaceae
|
| JASA | Jasminum sambac (L.) Ait. | Arabian jasmine | Oleaceae
|
| JASMI | Jasminum L. | jasmine | Oleaceae
|
| JAMI3 | Jateorhiza miersii Oliver | Jateorhiza palmata | Menispermaceae
|
| JAPA2 | Jateorhiza palmata (Lam.) Miers | jateorhiza | Menispermaceae
|
| JATEO | Jateorhiza Miers | jateorhiza | Menispermaceae
|
| JAAC2 | Jatropha aconitifolia Miller | Cnidoscolus aconitifolius | Euphorbiaceae
|
| JACA2 | Jatropha cardiophylla (Torr.) Muell.-Arg. | sangre de cristo | Euphorbiaceae
|
| JACA3 | Jatropha cathartica Teran & Berl. | Berlandier's nettlespurge | Euphorbiaceae
|
| JACI | Jatropha cinerea (Ortega) Muell.-Arg. | Arizona nettlespurge | Euphorbiaceae
|
| JACU | Jatropha cuneata Wiggins & Rollins | physicnut | Euphorbiaceae
|
| JACU2 | Jatropha curcas L. | Barbados nut | Euphorbiaceae
|
| JADID | Jatropha dioica Sess� ex Cerv. var. dioica | leatherstem | Euphorbiaceae
|
| JADIG | Jatropha dioica Sess� ex Cerv. var. graminea McVaugh | leatherstem | Euphorbiaceae
|
| JADI | Jatropha dioica Sess� ex Cerv. | leatherstem | Euphorbiaceae
|
| JAGOE | Jatropha gossypiifolia L. var. elegans (Pohl) Muell.-Arg. | bellyache bush | Euphorbiaceae
|
| JAGOG | Jatropha gossypiifolia L. var. gossypiifolia | bellyache bush | Euphorbiaceae
|
| JAGO | Jatropha gossypiifolia L. | bellyache bush | Euphorbiaceae
|
| JAHEH | Jatropha hernandiifolia Vent. var. hernandiifolia | wild oilnut | Euphorbiaceae
|
| JAHEP | Jatropha hernandiifolia Vent. var. portoricensis (Millsp.) Urban | wild oilnut | Euphorbiaceae
|
| JAHE | Jatropha hernandiifolia Vent. | wild oilnut | Euphorbiaceae
|
| JAINH | Jatropha integerrima Jacq. var. hastata (Jacq.) Fosberg | peregrina | Euphorbiaceae
|
| JAINI | Jatropha integerrima Jacq. var. integerrima | peregrina | Euphorbiaceae
|
| JAIN | Jatropha integerrima Jacq. | peregrina | Euphorbiaceae
|
| JAMAS | Jatropha macrorhiza Benth. var. septemfida Engelm. | ragged nettlespurge | Euphorbiaceae
|
| JAMA | Jatropha macrorhiza Benth. | ragged nettlespurge | Euphorbiaceae
|
| JAMA4 | Jatropha manihot L. | Manihot esculenta | Euphorbiaceae
|
| JAMU | Jatropha multifida L. | coralbush | Euphorbiaceae
|
| JAPO | Jatropha podagrica Hook. | goutystalk nettlespurge | Euphorbiaceae
|
| JASP | Jatropha spathula Muell. Arg. | | Euphorbiaceae
|
| JATE4 | Jatropha texana Muell.-Arg. | Cnidoscolus texanus | Euphorbiaceae
|
| JAUR | Jatropha urens L. | Cnidoscolus urens | Euphorbiaceae
|