| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| OPAU3 | Opuntia austrina Small | Opuntia humifusa var. austrina | Cactaceae
|
| OPBA4 | Opuntia ballii Rose | Opuntia macrorhiza var. pottsii | Cactaceae
|
| OPBA3 | Opuntia barkleyana (Daston) Rowley | Opuntia pulchella | Cactaceae
|
| OPBAA | Opuntia basilaris Engelm. & Bigelow var. aurea (E.M. Baxter) W.T. Marsh. | Opuntia aurea | Cactaceae
|
| OPBAB2 | Opuntia basilaris Engelm. & Bigelow var. basilaris | beavertail pricklypear | Cactaceae
|
| OPBAB | Opuntia basilaris Engelm. & Bigelow var. brachyclada (Griffiths) Munz | beavertail pricklypear | Cactaceae
|
| OPBAH | Opuntia basilaris Engelm. & Bigelow var. heilii Welsh & Neese | Heil's beavertail pricklypear | Cactaceae
|
| OPBAL | Opuntia basilaris Engelm. & Bigelow var. longiareolata (Clover & Jotter) L. Benson | beavertail pricklypear | Cactaceae
|
| OPBAR | Opuntia basilaris Engelm. & Bigelow var. ramosa Parish | Opuntia basilaris var. basilaris | Cactaceae
|
| OPBAT | Opuntia basilaris Engelm. & Bigelow var. treleasei (Coult.) Coult. ex Toumey | Trelease's beavertail pricklypear | Cactaceae
|
| OPBAW2 | Opuntia basilaris Engelm. & Bigelow var. whitneyana (E.M. Baxter) E.M. Baxter ex W.T. Marsh. | Opuntia basilaris var. basilaris | Cactaceae
|
| OPBAW3 | Opuntia basilaris Engelm. & Bigelow var. woodburyi W.H. Earle | Opuntia pinkavae | Cactaceae
|
| OPBA2 | Opuntia basilaris Engelm. & Bigelow | beavertail pricklypear | Cactaceae
|
| OPBE | Opuntia bentonii Griffiths | Opuntia stricta var. stricta | Cactaceae
|
| OPBIH | Opuntia bigelovii Engelm. var. hoffmannii Fosberg | Opuntia fosbergii | Cactaceae
|
| OPBI | Opuntia bigelovii Engelm. | teddybear cholla | Cactaceae
|
| OPBO | Opuntia borinquensis Britt. & Rose | olaga | Cactaceae
|
| OPBR4 | Opuntia brachyarthra Engelm. & Bigelow | Opuntia fragilis var. brachyarthra | Cactaceae
|
| OPBRH | Opuntia brachyclada Griffiths ssp. humistrata (Griffiths) Wiggins & Wolf | Opuntia basilaris var. basilaris | Cactaceae
|
| OPBR5 | Opuntia brachyclada Griffiths | Opuntia basilaris var. brachyclada | Cactaceae
|
| OPBR3 | Opuntia brachyrhopalica (Daston) Rowley | Opuntia pulchella | Cactaceae
|
| OPBR2 | Opuntia brasiliensis (Willd.) Haw. | Brazilian pricklypear | Cactaceae
|
| OPCA5 | Opuntia calcicola Wherry | Opuntia humifusa var. humifusa | Cactaceae
|
| OPCAC2 | Opuntia californica (Torr. & Gray) Coville var. californica | California pricklypear | Cactaceae
|
| OPCAP2 | Opuntia californica (Torr. & Gray) Coville var. parkeri (Coult.) Pinkava | brownspined pricklypear | Cactaceae
|
| OPCA11 | Opuntia californica (Torr. & Gray) Coville | California pricklypear | Cactaceae
|
| OPCA6 | Opuntia californica Engelm. | Opuntia tetracantha | Cactaceae
|
| OPCA7 | Opuntia camanchica Engelm. & Bigelow | Opuntia phaeacantha var. camanchica | Cactaceae
|
| OPCA2 | Opuntia canada Griffiths | Opuntia phaeacantha var. major | Cactaceae
|
| OPCH4 | Opuntia charlestonensis Clokey | plateau prickly pear | Cactaceae
|
| OPCH3 | Opuntia chihuahuensis Rose | Chihuahua pricklypear | Cactaceae
|
| OPCH2 | Opuntia chisosensis (Anthony) Ferguson | Chisos Mountain pricklypear | Cactaceae
|
| OPCHG | Opuntia chlorotica Engelm. & Bigelow var. gosseliniana (A. Weber) Ferguson | Opuntia gosseliniana | Cactaceae
|
| OPCHS | Opuntia chlorotica Engelm. & Bigelow var. santa-rita Griffiths & Hare | Opuntia santa-rita | Cactaceae
|
| OPCH | Opuntia chlorotica Engelm. & Bigelow | dollarjoint pricklypear | Cactaceae
|
| OPCL | Opuntia clavata Engelm. | club cholla | Cactaceae
|
| OPCO4 | Opuntia cochenillifera (L.) P. Mill. | cochineal nopal cactus | Cactaceae
|
| OPCO6 | Opuntia columbiana Griffiths | Opuntia erinacea var. columbiana | Cactaceae
|
| OPCOA3 | Opuntia compressa J.F. Macbr. var. allairei (Griffiths) Weniger | Opuntia humifusa var. humifusa | Cactaceae
|
| OPCOA | Opuntia compressa J.F. Macbr. var. ammophila (Small) L. Benson | Opuntia humifusa var. ammophila | Cactaceae
|
| OPCOA2 | Opuntia compressa J.F. Macbr. var. austrina (Small) L. Benson | Opuntia humifusa var. austrina | Cactaceae
|
| OPCOF | Opuntia compressa J.F. Macbr. var. fuscoatra (Engelm.) Weniger | Opuntia humifusa var. humifusa | Cactaceae
|
| OPCOG | Opuntia compressa J.F. Macbr. var. grandiflora (Engelm.) Weniger | Opuntia macrorhiza var. macrorhiza | Cactaceae
|
| OPCOM2 | Opuntia compressa J.F. Macbr. var. macrorhiza (Engelm.) L. Benson | Opuntia macrorhiza var. macrorhiza | Cactaceae
|
| OPCOM | Opuntia compressa J.F. Macbr. var. microsperma (Engelm. & Bigelow) L. Benson | Opuntia humifusa var. humifusa | Cactaceae
|
| OPCOS | Opuntia compressa J.F. Macbr. var. stenochila (Engelm.) Weniger | Opuntia macrorhiza var. macrorhiza | Cactaceae
|
| OPCO10 | Opuntia compressa J.F. Macbr. | Opuntia ficus-indica | Cactaceae
|
| OPCO12 | Opuntia compressa auct. non J.F. Macbr. | Opuntia humifusa var. humifusa | Cactaceae
|
| OPCO11 | Opuntia �congesta Griffiths (pro sp.) | | Cactaceae
|
| OPCOP | Opuntia covillei Britt. & Rose var. piercei (Fosberg) Munz | Opuntia littoralis var. piercei | Cactaceae
|
| OPCO7 | Opuntia covillei Britt. & Rose | Opuntia littoralis var. vaseyi | Cactaceae
|
| OPCU | Opuntia �cubensis Britt. & Rose | bullsuckers | Cactaceae
|
| OPCU3 | Opuntia cumulicola Small | Opuntia humifusa var. austrina | Cactaceae
|
| OPCU2 | Opuntia �curvospina Griffiths (pro sp.) | searchlight pricklypear | Cactaceae
|
| OPCY | Opuntia cymochila Engelm. & Bigelow | grassland pricklypear | Cactaceae
|
| OPDA2 | Opuntia davisii Engelm. & Bigelow | Opuntia tunicata var. davisii | Cactaceae
|
| OPDE | Opuntia �demissa Griffiths (pro sp.) | | Cactaceae
|
| OPDE2 | Opuntia densispina B.E. Ralston & R.A. Hilsenbeck | Big Bend pricklypear | Cactaceae
|
| OPDE4 | Opuntia �deserta Griffiths (pro sp.) | | Cactaceae
|
| OPDI2 | Opuntia dillei Griffiths | Opuntia engelmannii var. engelmannii | Cactaceae
|
| OPDI3 | Opuntia dillenii (Ker-Gawl.) Haw. | Opuntia stricta var. dillenii | Cactaceae
|
| OPDI5 | Opuntia discata Griffiths | smallfruit pricklypear | Cactaceae
|
| OPDR | Opuntia drummondii Graham | Opuntia pusilla | Cactaceae
|
| OPDU2 | Opuntia dulcis Engelm. | Opuntia phaeacantha var. phaeacantha | Cactaceae
|
| OPEB | Opuntia eburnispina Small | Opuntia humifusa var. austrina | Cactaceae
|
| OPECM | Opuntia echinocarpa Engelm. & Bigelow var. major Engelm. & Bigelow | Opuntia acanthocarpa var. major | Cactaceae
|
| OPECP | Opuntia echinocarpa Engelm. & Bigelow var. parkeri (Engelm.) Coult. | Opuntia californica var. parkeri | Cactaceae
|
| OPECW | Opuntia echinocarpa Engelm. & Bigelow var. wolfii L. Benson | Opuntia wolfii | Cactaceae
|
| OPEC | Opuntia echinocarpa Engelm. & Bigelow | golden cholla | Cactaceae
|
| OPED | Opuntia edwardsii V.& K. Grant | Edwards' pricklypear | Cactaceae
|
| OPEL | Opuntia �ellisiana Griffiths | tigertongue | Cactaceae
|
| OPEM | Opuntia emoryi Engelm. | Opuntia kunzei | Cactaceae
|
| OPEM2 | Opuntia emoryi auct. non Engelm. | Opuntia parishii | Cactaceae
|
| OPENA | Opuntia engelmannii Salm-Dyck var. aciculata (Griffiths) Weniger | Opuntia engelmannii var. lindheimeri | Cactaceae
|
| OPENA2 | Opuntia engelmannii Salm-Dyck var. alta (Griffiths) Weniger | Opuntia engelmannii var. lindheimeri | Cactaceae
|
| OPENC2 | Opuntia engelmannii Salm-Dyck var. cacanapa (Griffiths) Weniger | Opuntia engelmannii var. lindheimeri | Cactaceae
|
| OPENC | Opuntia engelmannii Salm-Dyck var. cuija Griffiths & Hare | cactus apple | Cactaceae
|
| OPENC3 | Opuntia engelmannii Salm-Dyck var. cycloides Engelm. & Bigelow | Opuntia phaeacantha var. major | Cactaceae
|
| OPEND | Opuntia engelmannii Salm-Dyck var. dulcis (Engelm.) Engelm. ex K. Schum. | Opuntia engelmannii var. lindheimeri | Cactaceae
|
| OPENE | Opuntia engelmannii Salm-Dyck var. engelmannii | cactus apple | Cactaceae
|
| OPENF | Opuntia engelmannii Salm-Dyck var. flavispina (L. Benson) Parfitt & Pinkava | cactus apple | Cactaceae
|
| OPENF2 | Opuntia engelmannii Salm-Dyck var. flexospina (Griffiths) Parfitt & Pinkava | cactus apple | Cactaceae
|
| OPENL | Opuntia engelmannii Salm-Dyck var. lindheimeri (Engelm.) Parfitt & Pinkava | Texas pricklypear | Cactaceae
|
| OPENL2 | Opuntia engelmannii Salm-Dyck var. linguiformis (Griffiths) Parfitt & Pinkava | cactus apple | Cactaceae
|
| OPENL3 | Opuntia engelmannii Salm-Dyck var. littoralis Engelm. | Opuntia littoralis var. littoralis | Cactaceae
|
| OPENT | Opuntia engelmannii Salm-Dyck var. texana (Griffiths) Weniger | Opuntia engelmannii var. lindheimeri | Cactaceae
|
| OPENW | Opuntia engelmannii Salm-Dyck var. wootonii (Griffiths) Fosberg | Opuntia phaeacantha var. wootonii | Cactaceae
|
| OPEN3 | Opuntia engelmannii Salm-Dyck | cactus apple | Cactaceae
|
| OPERA | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. aurea (E.M. Baxter) Welsh | Opuntia aurea | Cactaceae
|
| OPERC2 | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. columbiana (Griffiths) L. Benson | grizzleybear pricklypear | Cactaceae
|
| OPERE | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. erinacea | grizzlybear pricklypear | Cactaceae
|
| OPERH | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. hystricina (Engelm. & Bigelow) L. Benson | grizzlybear pricklypear | Cactaceae
|
| OPERP | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. paucispina Dunkle | Opuntia erinacea var. utahensis | Cactaceae
|
| OPERU | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. ursina (A. Weber) Parish | grizzlybear pricklypear | Cactaceae
|
| OPERU2 | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. utahensis (Engelm.) L. Benson | Utah grizzlybear pricklypear | Cactaceae
|
| OPERX | Opuntia erinacea Engelm. & Bigelow ex Engelm. var. xanthostemma (K. Schum. ex Hirscht-Zehl.) L. Benson | Opuntia erinacea var. utahensis | Cactaceae
|
| OPER | Opuntia erinacea Engelm. & Bigelow ex Engelm. | grizzlybear pricklypear | Cactaceae
|
| OPFI | Opuntia ficus-indica (L.) P. Mill. | tuna cactus | Cactaceae
|
| OPFL | Opuntia flexospina Griffiths | Opuntia engelmannii var. flexospina | Cactaceae
|
| OPFO2 | Opuntia fosbergii C.B. Wolf | Hoffmann's teddybear cholla | Cactaceae
|
| OPFRB2 | Opuntia fragilis (Nutt.) Haw. ssp. brachyarthra (Engelm. & Bigelow) W.A. Weber | Opuntia fragilis var. brachyarthra | Cactaceae
|