| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CUGL8 | Cunila glabella Michx. | Clinopodium glabellum | Lamiaceae
|
| CUMA7 | Cunila mariana L. | Cunila origanoides | Lamiaceae
|
| CUOR | Cunila origanoides (L.) Britt. | common dittany | Lamiaceae
|
| CUPU | Cunila pulegioides L. | Hedeoma pulegioides | Lamiaceae
|
| CUNIL | Cunila D. Royen ex L. | cunila | Lamiaceae
|
| CULA | Cunninghamia lanceolata (Lamb.) Hook. | Chinese fir | Taxodiaceae
|
| CUNNI | Cunninghamia R. Br. | cunninghamia | Taxodiaceae
|
| CUAM | Cupania americana L. | wild ackee | Sapindaceae
|
| CUGL | Cupania glabra Sw. | Florida toadwood | Sapindaceae
|
| CUSA5 | Cupania sapida (Konig) Voigt | Blighia sapida | Sapindaceae
|
| CUTR | Cupania triquetra A. Rich. | guara blanca | Sapindaceae
|
| CUPAN | Cupania L. | cupania | Sapindaceae
|
| CUAN4 | Cupaniopsis anacardioides (A. Rich.) Radlk. | carrotwood | Sapindaceae
|
| CUPAN2 | Cupaniopsis Radlk. | carrotwood | Sapindaceae
|
| CUAS | Cuphea aspera Chapman | tropical waxweed | Lythraceae
|
| CUCA4 | Cuphea carthagenensis (Jacq.) J.F. Macbr. | Colombian waxweed | Lythraceae
|
| CUGL4 | Cuphea glutinosa Cham. & Schlecht. | sticky waxweed | Lythraceae
|
| CUHY | Cuphea hyssopifolia Kunth | false heather | Lythraceae
|
| CUIG | Cuphea ignea A. DC. | cigar flower | Lythraceae
|
| CUMI | Cuphea micrantha Kunth | tinypetal waxweed | Lythraceae
|
| CUPA2 | Cuphea parsonsia (L.) R. Br. ex Steud. | island waxweed | Lythraceae
|
| CUPE4 | Cuphea petiolata (L.) Koehne | Cuphea viscosissima | Lythraceae
|
| CUPR | Cuphea procumbens Ortega | creeping waxweed | Lythraceae
|
| CUST4 | Cuphea strigulosa Kunth | stiffhair waxweed | Lythraceae
|
| CUVI | Cuphea viscosissima Jacq. | blue waxweed | Lythraceae
|
| CUWRN | Cuphea wrightii Gray var. nematopetala Bacig. | Cuphea wrightii | Lythraceae
|
| CUWR | Cuphea wrightii Gray | Wright's waxweed | Lythraceae
|
| CUPHE | Cuphea P. Br. | waxweed | Lythraceae
|
| CULE2 | �Cupressocyparis leylandii (Dallimore & Jackson) Dallimore | | Cupressaceae
|
| CUPRE2 | �Cupressocyparis Dallimore | | Cupressaceae
|
| CUAB | Cupressus abramsiana C.B. Wolf | Santa Cruz Island cypress | Cupressaceae
|
| CUARA | Cupressus arizonica Greene ssp. arizonica | Arizona cypress | Cupressaceae
|
| CUARN2 | Cupressus arizonica Greene ssp. nevadensis (Abrams) E. Murray | Piute cypress | Cupressaceae
|
| CUARS2 | Cupressus arizonica Greene ssp. stephensonii (C.B. Wolf) Beauchamp | Cuyamaca cypress | Cupressaceae
|
| CUARG | Cupressus arizonica Greene var. glabra (Sudsworth) Little | Cupressus arizonica ssp. arizonica | Cupressaceae
|
| CUARN | Cupressus arizonica Greene var. nevadensis (Abrams) Little | Cupressus arizonica ssp. nevadensis | Cupressaceae
|
| CUARS | Cupressus arizonica Greene var. stephensonii (C.B. Wolf) Little | Cupressus arizonica ssp. stephensonii | Cupressaceae
|
| CUAR | Cupressus arizonica Greene | Arizona cypress | Cupressaceae
|
| CUBAM | Cupressus bakeri Jepson ssp. matthewsii C.B. Wolf | Cupressus bakeri | Cupressaceae
|
| CUBA | Cupressus bakeri Jepson | Modoc cypress | Cupressaceae
|
| CUFO2 | Cupressus forbesii Jepson | tecate cypress | Cupressaceae
|
| CUGL9 | Cupressus glabra Sudsworth | Cupressus arizonica ssp. arizonica | Cupressaceae
|
| CUGOG | Cupressus goveniana Gord. ssp. goveniana | Gowen cypress | Cupressaceae
|
| CUGOP2 | Cupressus goveniana Gord. ssp. pygmaea (Lemmon) Bartel | pygmy cypress | Cupressaceae
|
| CUGOA | Cupressus goveniana Gord. var. abramsiana (C.B. Wolf) Little | Cupressus abramsiana | Cupressaceae
|
| CUGOP | Cupressus goveniana Gord. var. pygmaea Lemmon | Cupressus goveniana ssp. pygmaea | Cupressaceae
|
| CUGO | Cupressus goveniana Gord. | Gowen cypress | Cupressaceae
|
| CUGUF2 | Cupressus guadalupensis S. Wats. ssp. forbesii (Jepson) Beauchamp | Cupressus forbesii | Cupressaceae
|
| CUGUF | Cupressus guadalupensis S. Wats. var. forbesii (Jepson) Little | Cupressus forbesii | Cupressaceae
|
| CULA3 | Cupressus lawsoniana A. Murr. | Chamaecyparis lawsoniana | Cupressaceae
|
| CUMAN | Cupressus macnabiana A. Murr. var. nevadensis (Abrams) Abrams | Cupressus arizonica ssp. nevadensis | Cupressaceae
|
| CUMA | Cupressus macnabiana A. Murr. | MacNab's cypress | Cupressaceae
|
| CUMA2 | Cupressus macrocarpa Hartw. ex Gord. | Monterey cypress | Cupressaceae
|
| CUNE2 | Cupressus nevadensis Abrams | Cupressus arizonica ssp. nevadensis | Cupressaceae
|
| CUNO | Cupressus nootkatensis D. Don | Chamaecyparis nootkatensis | Cupressaceae
|
| CUPY | Cupressus pygmaea (Lemmon) Sarg. | Cupressus goveniana ssp. pygmaea | Cupressaceae
|
| CUSA3 | Cupressus sargentii Jepson | Sargent's cypress | Cupressaceae
|
| CUSE2 | Cupressus sempervirens L. | Italian cypress | Cupressaceae
|
| CUST | Cupressus stephensonii C.B. Wolf | Cupressus arizonica ssp. stephensonii | Cupressaceae
|
| CUPRE | Cupressus L. | cypress | Cupressaceae
|
| CUVI3 | Cupularia viscosa (L.) Gren. & Godr. | Dittrichia viscosa | Asteraceae
|
| CUCU4 | Curcas curcas (L.) Britt. & Millsp. | Jatropha curcas | Euphorbiaceae
|
| CUHE | Curcas hernandiifolia (Vent.) Britt. | Jatropha hernandiifolia var. hernandiifolia | Euphorbiaceae
|
| CUCA3 | Curculigo capitulata (Lour.) Kuntze | palm-grass | Liliaceae
|
| CUSC | Curculigo scorzonerifolia (Lam.) Baker | gorgojo | Liliaceae
|
| CURCU2 | Curculigo Gaertn. | curculigo | Liliaceae
|
| CUAM4 | Curcuma amada Roxb. | mango ginger | Zingiberaceae
|
| CUAN2 | Curcuma angustifolia Roxb. | east indian arrowroot | Zingiberaceae
|
| CUAR3 | Curcuma aromatica Salisb. | curcuma | Zingiberaceae
|
| CUDO2 | Curcuma domestica Val. | Curcuma longa | Zingiberaceae
|
| CULO | Curcuma longa L. | common turmeric | Zingiberaceae
|
| CUZE | Curcuma zedoaria (Christm.) Roscoe | zedoary | Zingiberaceae
|
| CURCU | Curcuma L. | curcuma | Zingiberaceae
|
| CUCA7 | Curima calophylla O.F. Cook | Aiphanes minima | Arecaceae
|
| CUAM3 | Cuscuta americana L. | American dodder | Cuscutaceae
|
| CUAP | Cuscuta applanata Engelm. | Gila River dodder | Cuscutaceae
|
| CUAPU | Cuscuta approximata Bab. var. urceolata (Kunze) Yuncker | Cuscuta approximata | Cuscutaceae
|
| CUAP2 | Cuscuta approximata Bab. | alfalfa dodder | Cuscutaceae
|
| CUAR2 | Cuscuta arvensis Bey. ex Engelm. | Cuscuta pentagona var. pentagona | Cuscutaceae
|
| CUAT | Cuscuta attenuata Waterfall | tapertip dodder | Cuscutaceae
|
| CUAU | Cuscuta australis R.Br. | Cuscuta obtusiflora | Cuscutaceae
|
| CUBO | Cuscuta boldinghii Urban | Boldingh's dodder | Cuscutaceae
|
| CUBRA | Cuscuta brachycalyx (Yuncker) Yuncker var. apodanthera (Yuncker) Yuncker | San Joaquin dodder | Cuscutaceae
|
| CUBRB | Cuscuta brachycalyx (Yuncker) Yuncker var. brachycalyx | San Joaquin dodder | Cuscutaceae
|
| CUBR | Cuscuta brachycalyx (Yuncker) Yuncker | San Joaquin dodder | Cuscutaceae
|
| CUCAA | Cuscuta californica Hook. & Arn. var. apiculata Engelm. | chaparral dodder | Cuscutaceae
|
| CUCAB | Cuscuta californica Hook. & Arn. var. breviflora Engelm. | chaparral dodder | Cuscutaceae
|
| CUCAC | Cuscuta californica Hook. & Arn. var. californica | chaparral dodder | Cuscutaceae
|
| CUCAP | Cuscuta californica Hook. & Arn. var. papillosa Yuncker | chaparral dodder | Cuscutaceae
|
| CUCA | Cuscuta californica Hook. & Arn. | chaparral dodder | Cuscutaceae
|
| CUCA2 | Cuscuta campestris Yuncker | Cuscuta pentagona var. pentagona | Cuscutaceae
|
| CUCA5 | Cuscuta cassytoides Nees ex Engelm. | African dodder | Cuscutaceae
|
| CUCE2 | Cuscuta ceanothi Behr | canyon dodder | Cuscutaceae
|
| CUCE | Cuscuta cephalanthi Engelm. | buttonbush dodder | Cuscutaceae
|
| CUCOC | Cuscuta compacta Juss. ex Choisy var. compacta | compact dodder | Cuscutaceae
|
| CUCOE | Cuscuta compacta Juss. ex Choisy var. efimbriata Yuncker | compact dodder | Cuscutaceae
|
| CUCO2 | Cuscuta compacta Juss. ex Choisy | compact dodder | Cuscutaceae
|
| CUCO3 | Cuscuta coryli Engelm. | hazel dodder | Cuscutaceae
|
| CUCU3 | Cuscuta curta (Engelm.) Rydb. | Cuscuta megalocarpa | Cuscutaceae
|
| CUCU2 | Cuscuta cuspidata Engelm. | cusp dodder | Cuscutaceae
|
| CUDE | Cuscuta decipiens Yuncker | TransPecos dodder | Cuscutaceae
|