| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| JUHE | Juncus hemiendytus F.J. Herm. | Herman's dwarf rush | Juncaceae
|
| JUHO | Juncus howellii F.J. Herm. | Howell's rush | Juncaceae
|
| JUIN | Juncus inflexus L. | European meadow rush | Juncaceae
|
| JUINA | Juncus interior Wieg. var. arizonicus (Wieg.) F.J. Herm. | Arizona rush | Juncaceae
|
| JUINI | Juncus interior Wieg. var. interior | inland rush | Juncaceae
|
| JUINN | Juncus interior Wieg. var. neomexicanus (Wieg.) F.J. Herm. | New Mexico rush | Juncaceae
|
| JUIN2 | Juncus interior Wieg. | inland rush | Juncaceae
|
| JUJO2 | Juncus jonesii Rydb. | Juncus regelii | Juncaceae
|
| JUKA | Juncus kansanus F.J. Herm. | Juncus brachyphyllus | Juncaceae
|
| JUKE | Juncus kelloggii Engelm. | Kellogg's dwarf rush | Juncaceae
|
| JULEA | Juncus leiospermus F.J. Herm. var. ahartii Ertter | Ahart's dwarf rush | Juncaceae
|
| JULEL | Juncus leiospermus F.J. Herm. var. leiospermus | Red Bluff dwarf rush | Juncaceae
|
| JULE2 | Juncus leiospermus F.J. Herm. | Red Bluff dwarf rush | Juncaceae
|
| JULE | Juncus lesueurii Boland. | salt rush | Juncaceae
|
| JULE4 | Juncus leucochlamys Zing. ex Krecz. | Juncus castaneus ssp. leucochlamys | Juncaceae
|
| JULO2 | Juncus longii Fern. | Long's rush | Juncaceae
|
| JULOL | Juncus longistylis Torr. var. longistylis | longstyle rush | Juncaceae
|
| JULOS | Juncus longistylis Torr. var. scabratus F.J. Herm. | longstyle rush | Juncaceae
|
| JULO | Juncus longistylis Torr. | longstyle rush | Juncaceae
|
| JULU2 | Juncus luciensis Ertter | Santa Lucia dwarf rush | Juncaceae
|
| JUMA7 | Juncus macer S.F. Gray | Juncus tenuis | Juncaceae
|
| JUMA2 | Juncus macrandrus Coville | longanther rush | Juncaceae
|
| JUMA3 | Juncus macrophyllus Coville | longleaf rush | Juncaceae
|
| JUMAB | Juncus marginatus Rostk. var. biflorus Wood | Juncus biflorus | Juncaceae
|
| JUMAO | Juncus marginatus Rostk. var. odoratus Torr. | Juncus biflorus | Juncaceae
|
| JUMAS | Juncus marginatus Rostk. var. setosus Coville | Juncus marginatus | Juncaceae
|
| JUMA4 | Juncus marginatus Rostk. | grassleaf rush | Juncaceae
|
| JUMA5 | Juncus maritimus Lam. | sea rush | Juncaceae
|
| JUME | Juncus megacephalus M.A. Curtis | bighead rush | Juncaceae
|
| JUME2 | Juncus megaspermus F.J. Herm. | Juncus triformis | Juncaceae
|
| JUME5 | Juncus melanocarpus Michx. | Luzula parviflora | Juncaceae
|
| JUMEG | Juncus mertensianus Bong. ssp. gracilis (Engelm.) F.J. Herm. | Juncus nevadensis var. nevadensis | Juncaceae
|
| JUMEB | Juncus mertensianus Bong. var. badius (Suksdorf) F.J. Herm. | Juncus nevadensis var. badius | Juncaceae
|
| JUMEC | Juncus mertensianus Bong. var. columbianus (Coville) F.J. Herm. | Juncus nevadensis var. columbianus | Juncaceae
|
| JUMED | Juncus mertensianus Bong. var. duranii (Ewan) F.J. Herm. | Juncus duranii | Juncaceae
|
| JUME3 | Juncus mertensianus Bong. | Mertens' rush | Juncaceae
|
| JUME4 | Juncus mexicanus Willd. ex J.A. & J.H. Schultes | Mexican rush | Juncaceae
|
| JUMI2 | Juncus militaris Bigelow | bayonet rush | Juncaceae
|
| JUMU | Juncus multiflorus (Ehrh.) Hoffmann, non Retz. | Luzula multiflora ssp. multiflora var. multiflora | Juncaceae
|
| JUNE2 | Juncus neomexicanus Wieg. | Juncus interior var. neomexicanus | Juncaceae
|
| JUNEB | Juncus nevadensis S. Wats. var. badius (Suksdorf) C.L. Hitchc. | Sierra rush | Juncaceae
|
| JUNEC | Juncus nevadensis S. Wats. var. columbianus (Coville) St. John | Columubia rush | Juncaceae
|
| JUNEI | Juncus nevadensis S. Wats. var. inventus (Henderson) C.L. Hitchc. | Sierra rush | Juncaceae
|
| JUNEN | Juncus nevadensis S. Wats. var. nevadensis | Sierra rush | Juncaceae
|
| JUNE | Juncus nevadensis S. Wats. | Sierra rush | Juncaceae
|
| JUNO | Juncus nodatus Coville | stout rush | Juncaceae
|
| JUNO3 | Juncus �nodosiformis Fern. | | Juncaceae
|
| JUNOM | Juncus nodosus L. var. meridianus F.J. Herm. | knotted rush | Juncaceae
|
| JUNON | Juncus nodosus L. var. nodosus | knotted rush | Juncaceae
|
| JUNO2 | Juncus nodosus L. | knotted rush | Juncaceae
|
| JUOB | Juncus obtusatus Engelm., non Kit. | Juncus covillei var. obtusatus | Juncaceae
|
| JUOC2 | Juncus occidentalis Wieg. | western rush | Juncaceae
|
| JUOR4 | Juncus oreganus S. Wats. | Juncus supiniformis | Juncaceae
|
| JUOR2 | Juncus �oronensis Fern. (pro sp.) | | Juncaceae
|
| JUOR | Juncus orthophyllus Coville | straightleaf rush | Juncaceae
|
| JUOX | Juncus oxymeris Engelm. | pointed rush | Juncaceae
|
| JUPA | Juncus parryi Engelm. | Parry's rush | Juncaceae
|
| JUPA5 | Juncus parviflorus Ehrh. | Luzula parviflora | Juncaceae
|
| JUPA2 | Juncus patens E. Mey. | spreading rush | Juncaceae
|
| JUPEC | Juncus pelocarpus E. Mey. var. crassicaudex Engelm. | Juncus abortivus | Juncaceae
|
| JUPES | Juncus pelocarpus E. Mey. var. sabulonensis St. John | Juncus pelocarpus | Juncaceae
|
| JUPE | Juncus pelocarpus E. Mey. | brownfruit rush | Juncaceae
|
| JUPE2 | Juncus pervetus Fern. | Juncus subnodulosus | Juncaceae
|
| JUPHG | Juncus phaeocephalus Engelm. var. glomeratus Engelm. | Juncus phaeocephalus var. phaeocephalus | Juncaceae
|
| JUPHP | Juncus phaeocephalus Engelm. var. paniculatus Engelm. | brownhead rush | Juncaceae
|
| JUPHP2 | Juncus phaeocephalus Engelm. var. phaeocephalus | brownhead rush | Juncaceae
|
| JUPH | Juncus phaeocephalus Engelm. | brownhead rush | Juncaceae
|
| JUPL | Juncus planifolius R. Br. | broadleaf rush | Juncaceae
|
| JUPL3 | Juncus platycephalus Michx. | Juncus validus var. validus | Juncaceae
|
| JUPL2 | Juncus platyphyllus (Wieg.) Fern. | Juncus dichotomus | Juncaceae
|
| JUPO2 | Juncus polyanthemos Buch. | manyflower rush | Juncaceae
|
| JUPO | Juncus polycephalus Michx. | manyhead rush | Juncaceae
|
| JUPY | Juncus pylaei Laharpe | Juncus effusus var. pylaei | Juncaceae
|
| JURA | Juncus ranarius Perrier & Song. | Juncus ambiguus | Juncaceae
|
| JURE | Juncus regelii Buch. | Regel's rush | Juncaceae
|
| JURE2 | Juncus repens Michx. | lesser creeping rush | Juncaceae
|
| JURI2 | Juncus richardsonianus J.A. Schultes | Juncus alpinoarticulatus ssp. nodulosus | Juncaceae
|
| JURO2 | Juncus robustus (Engelm.) Coville | Juncus nodatus | Juncaceae
|
| JURO | Juncus roemerianus Scheele | needlegrass rush | Juncaceae
|
| JURU | Juncus rugulosus Engelm. | wrinkled rush | Juncaceae
|
| JUSAR | Juncus saximontanus A. Nels. var. robustior M.E. Peck | Juncus saximontanus | Juncaceae
|
| JUSA | Juncus saximontanus A. Nels. | Rocky Mountain rush | Juncaceae
|
| JUSCC | Juncus scirpoides Lam. var. compositus Harper | Juncus scirpoides | Juncaceae
|
| JUSCM | Juncus scirpoides Lam. var. meridionalis Buch. | Juncus scirpoides | Juncaceae
|
| JUSC | Juncus scirpoides Lam. | needlepod rush | Juncaceae
|
| JUSE | Juncus secundus Beauv. ex Poir. | lopsided rush | Juncaceae
|
| JUSE3 | Juncus setaceus Rostk. | Juncus coriaceus | Juncaceae
|
| JUSE4 | Juncus setosus (Coville) Small | Juncus marginatus | Juncaceae
|
| JUSL | Juncus slwookoorum S.B. Young | Juncus mertensianus | Juncaceae
|
| JUSP | Juncus sphaerocarpus auct. non Nees ex Funck | Juncus bufonius var. occidentalis | Juncaceae
|
| JUSQ | Juncus squarrosus L. | mosquito rush | Juncaceae
|
| JUST2 | Juncus �stuckeyi Reinking | | Juncaceae
|
| JUSTA | Juncus stygius L. ssp. americanus (Buch.) Hult�n | moor rush | Juncaceae
|
| JUSTA2 | Juncus stygius L. var. americanus Buch. | Juncus stygius ssp. americanus | Juncaceae
|
| JUST | Juncus stygius L. | moor rush | Juncaceae
|
| JUSU | Juncus subcaudatus (Engelm.) Coville & Blake | woodland rush | Juncaceae
|
| JUSU7 | Juncus subnodulosus Schrank | bluntflower rush | Juncaceae
|
| JUSU2 | Juncus subtilis E. Mey. | greater creeping rush | Juncaceae
|
| JUSU3 | Juncus supiniformis Engelm. | hairyleaf rush | Juncaceae
|
| JUSU8 | Juncus supinus Moench | Juncus bulbosus | Juncaceae
|
| JUTEA | Juncus tenuis Willd. var. anthelatus Wieg. | Juncus tenuis | Juncaceae
|