1124696 206265 Carnegiea gigantea (Engelm.) Britton & Rose [125 225941 Cereus giganteus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 1 (1839) [P. Roetter]
 
7164912 390609 Epithelantha micromeris (Engelm.) F.A.C.Weber ex Britton & Rose [-1-1] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 1 () [P. Roetter]
 
7172462 390609 Epithelantha micromeris (Engelm.) F.A.C.Weber ex Britton & Rose [-1] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 2 () [P. Roetter]
 
7165012 390609 Epithelantha micromeris (Engelm.) F.A.C.Weber ex Britton & Rose [-1-1] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 2 () [P. Roetter]
 
716512 639217 Mammillaria lasiacantha Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 3 () [P. Roetter]
 
7165262 639217 Mammillaria lasiacantha Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 4 () [P. Roetter]
 
7165362 639537 Mammillaria prolifera (Miller) Haw. [111 639571 Mammillaria pusilla DC.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 5 () [P. Roetter]
 
717252 638659 Mammillaria barbata Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 6 () [P. Roetter]
 
716542 639056 Mammillaria grahamii Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 6 () [P. Roetter]
 
716556 639797 Mammillaria tetrancistra Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 7 () [P. Roetter]
 
717262 639051 Mammillaria goodridgii Scheer Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 8 () [P. Roetter]
 
716562 639892 Mammillaria wrightii Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 8 () [P. Roetter]
 
7172762 639125 Mammillaria heyderi Muehlenpf. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 9 () [P. Roetter]
 
7172862 639125 Mammillaria heyderi Muehlenpf. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 9 () [P. Roetter]
 
7172912 639125 Mammillaria heyderi Muehlenpf. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 9 () [P. Roetter]
 
7165712 639125 Mammillaria heyderi Muehlenpf. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 9 () [P. Roetter]
 
716586 278415 Coryphantha echinus (Engelm.) Britton & Rose [125 638925 Mammillaria echinus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 10 () [P. Roetter]
 
716596 278415 Coryphantha echinus (Engelm.) Britton & Rose [125 638925 Mammillaria echinus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 11 () [P. Roetter]
 
7173012 409215 Escobaria dasyacantha (Engelm.) Britton & Rose [-1-1] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 12 () [P. Roetter]
 
7166012 409267 Escobaria tuberculosa (Engelm.) Britton & Rose [12 409267 Escobaria tuberculosa (Engelm.) Britton & Rose] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 12 () [P. Roetter]
 
716615 409275 Escobaria vivipara (Nutt.) Buxb. [116 172110 Cactus viviparus Nutt.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 13 () [P. Roetter]
 
71662xx 278459 Coryphantha macromeris (Engelm.) Britton & Rose [-1126639280 Mammillaria macromeris Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 14 () [P. Roetter]
 
71663xx 278459 Coryphantha macromeris (Engelm.) Britton & Rose [-1126639280 Mammillaria macromeris Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 15 () [P. Roetter]
 
7166412 85728 Ariocarpus fissuratus (Engelm.) Schumann [12 85728 Ariocarpus fissuratus (Engelm.) Schumann] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 16 () [P. Roetter]
 
716652 369560 Echinocactus scheeri Salm-Dyck Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 17 () [P. Roetter]
 
716666 924244 Sclerocactus scheeri (Salm-Dyck) N.P. Taylor [125 369560 Echinocactus scheeri Salm-Dyck] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 18 () [P. Roetter]
 
716676 924244 Sclerocactus scheeri (Salm-Dyck) N.P. Taylor [125 369560 Echinocactus scheeri Salm-Dyck] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 19 () [P. Roetter]
 
716682 369591 Echinocactus setispinus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 20 () [P. Roetter]
 
716695 432076 Ferocactus haematacanthus (Monv. ex Salm-Dyck) Bravo ex Backeb. & F.M.Knuth [181 369270 Echinocactus longihamatus Galeotti ex Pfeiff.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 21 () [P. Roetter]
 
716705 432076 Ferocactus haematacanthus (Monv. ex Salm-Dyck) Bravo ex Backeb. & F.M.Knuth [181 369270 Echinocactus longihamatus Galeotti ex Pfeiff.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 22 () [P. Roetter]
 
716715 432076 Ferocactus haematacanthus (Monv. ex Salm-Dyck) Bravo ex Backeb. & F.M.Knuth [181 369270 Echinocactus longihamatus Galeotti ex Pfeiff.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 23 () [P. Roetter]
 
716725 432076 Ferocactus haematacanthus (Monv. ex Salm-Dyck) Bravo ex Backeb. & F.M.Knuth [181 369270 Echinocactus longihamatus Galeotti ex Pfeiff.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 24 () [P. Roetter]
 
716736 432163 Ferocactus wislizeni (Engelm.) Britton & Rose [125 369742 Echinocactus wislizeni Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 25 () [P. Roetter]
 
716746 432163 Ferocactus wislizeni (Engelm.) Britton & Rose [125 369742 Echinocactus wislizeni Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 26 () [P. Roetter]
 
716756 432095 Ferocactus lecontei (Engelm.) Britton & Rose [125 369247 Echinocactus lecontei Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 27 () [P. Roetter]
 
716766 432163 Ferocactus wislizeni (Engelm.) Britton & Rose [125 369742 Echinocactus wislizeni Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 28 () [P. Roetter]
 
716776 432156 Ferocactus viridescens (Nutt. ex Torrey & A. Gray) Britton & Rose [80 369724 Echinocactus viridescens Nutt.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 29 () [P. Roetter]
 
716786 432028 Ferocactus acanthodes (Lemaire) Britton & Rose [80 368947 Echinocactus cylindraceus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 30 () [P. Roetter]
 
716792 369160 Echinocactus horizonthalonius Lemaire Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 31 () [P. Roetter]
 
716802 369160 Echinocactus horizonthalonius Lemaire Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 32 () [P. Roetter]
 
717312 369418 Echinocactus parryi Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 32 () [P. Roetter]
 
716812 369672 Echinocactus texensis Hopffer Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 33 () [P. Roetter]
 
717326 403003 Eriosyce aurata (Pfeiff.) Backeb. [125 368820 Echinocactus auratus Pfeiff.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 33 () [P. Roetter]
 
7168216 370970 Echinomastus intertextus (Engelm.) Britton & Rose [-1] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 34 () [P. Roetter]
 
71683 Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 35 () [P. Roetter]
 
717346 370985 Echinomastus unguispinus (Engelm.) Britton & Rose [125 369705 Echinocactus unguispinus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 35 () [P. Roetter]
 
716846 370319 Echinocereus viridiflorus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 36 () [P. Roetter]
 
716856 369863 Echinocereus chloranthus (Engelm.) J.N.Haage [125 225732 Cereus chloranthus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 37 () [P. Roetter]
 
716866 369863 Echinocereus chloranthus (Engelm.) J.N.Haage [125 225732 Cereus chloranthus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 38 () [P. Roetter]
 
716876 369905 Echinocereus dasyacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 39 () [P. Roetter]
 
716886 369905 Echinocereus dasyacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 40 () [P. Roetter]
 
716896 369905 Echinocereus dasyacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 41 () [P. Roetter]
 
717355 370203 Echinocereus roetteri (Engelm.) Engelm. ex Rümpler [116 226447 Cereus roetteri Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 41 () [P. Roetter]
 
716902 225801 Cereus ctenoides Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 42 () [P. Roetter]
 
716916 370179 Echinocereus reichenbachii (Terscheck) J.N.Haage [125 369521 Echinocactus reichenbachii Terscheck] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 43 () [P. Roetter]
 
716926 370179 Echinocereus reichenbachii (Terscheck) J.N.Haage [125 369521 Echinocactus reichenbachii Terscheck] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 44 () [P. Roetter]
 
716936 370025 Echinocereus longisetus (Engelm.) Lemaire [125 226139 Cereus longisetus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 45 () [P. Roetter]
 
716946 370260 Echinocereus stramineus (Engelm.) F.Seitz [125 226551 Cereus stramineus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 46 () [P. Roetter]
 
716956 370260 Echinocereus stramineus (Engelm.) F.Seitz [125 226551 Cereus stramineus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 47 () [P. Roetter]
 
716966 370260 Echinocereus stramineus (Engelm.) F.Seitz [125 226551 Cereus stramineus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 48 () [P. Roetter]
 
717366 369933 Echinocereus enneacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 48 () [P. Roetter]
 
716976 369933 Echinocereus enneacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 49 () [P. Roetter]
 
716986 369933 Echinocereus enneacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 50 () [P. Roetter]
 
716996 369947 Echinocereus fendleri (Engelm.) Rümpler [125 225888 Cereus fendleri Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 51 () [P. Roetter]
 
717006 369947 Echinocereus fendleri (Engelm.) Rümpler [125 225888 Cereus fendleri Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 52 () [P. Roetter]
 
717016 369947 Echinocereus fendleri (Engelm.) Rümpler [125 225888 Cereus fendleri Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 53 () [P. Roetter]
 
717026 370138 Echinocereus polyacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 54 () [P. Roetter]
 
717036 370138 Echinocereus polyacanthus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 55 () [P. Roetter]
 
717045 369886 Echinocereus coccineus Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 56 () [P. Roetter]
 
717056 369922 Echinocereus engelmannii (Parry ex Engelm.) Lemaire [125 225860 Cereus engelmannii Parry ex Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 57 () [P. Roetter]
 
717066 369825 Echinocereus berlandieri (Engelm.) J.N.Haage [125 225628 Cereus berlandieri Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 58 () [P. Roetter]
 
717075 370121 Echinocereus pentalophus (DC.) Lemaire [116 226319 Cereus pentalophus DC.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 59 () [P. Roetter]
 
717375 370148 Echinocereus poselgeri Lemaire Rep. U.S. Mex. Bound. (Cactaceae of the boundary): p. 39, t. 59, fig. 12 () [P. Roetter]
 
717086 139133 Bergerocactus emoryi (Engelm.) Britton & Rose [125 225859 Cereus emoryi Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 60 () [P. Roetter]
 
717385 7613 Acanthocereus tetragonus (L.) Hummelinck [116 172069 Cactus tetragonus L.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 60 () [P. Roetter]
 
717096 206265 Carnegiea gigantea (Engelm.) Britton & Rose [125 225941 Cereus giganteus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 61 () [P. Roetter]
 
717106 206265 Carnegiea gigantea (Engelm.) Britton & Rose [125 225941 Cereus giganteus Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 62 () [P. Roetter]
 
717115 762736 Peniocereus greggii (Engelm.) Britton & Rose [116 225972 Cereus greggii Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 63 () [P. Roetter]
 
717125 762736 Peniocereus greggii (Engelm.) Britton & Rose [116 225972 Cereus greggii Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 64 () [P. Roetter]
 
71713 Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 65 () [P. Roetter]
 
717142 720873 Opuntia stenopetala Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 66 () [P. Roetter]
 
717152 720879 Opuntia strigil Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 67 () [P. Roetter]
 
7171612 720490 Opuntia macrorhiza Engelm. [80 720237 Opuntia filipendula Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 68 () [P. Roetter]
 
717172 720490 Opuntia macrorhiza Engelm. Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 69 () [P. Roetter]
 
717186 1134377 Corynopuntia emoryi (Engelm.) M.P.Griff. [125 720182 Opuntia emoryi Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 70 () [P. Roetter]
 
717396 1134377 Corynopuntia emoryi (Engelm.) M.P.Griff. [125 720182 Opuntia emoryi Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 71 () [P. Roetter]
 
717406 1134378 Corynopuntia grahamii (Engelm.) F.M.Knuth [125 720302 Opuntia grahamii Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 72 () [P. Roetter]
 
717416 1134388 Corynopuntia schottii (Engelm.) F.M.Knuth [125 720816 Opuntia schottii Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 73 () [P. Roetter]
 
717426 1134388 Corynopuntia schottii (Engelm.) F.M.Knuth [125 720816 Opuntia schottii Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 73 () [P. Roetter]
 
717436 1134374 Corynopuntia bulbispina (Engelm.) F.M.Knuth [125 719991 Opuntia bulbispina Engelm.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 73 () [P. Roetter]
 
717446 1139522 Cylindropuntia imbricata (Haw.) F.M.Knuth [125 226045 Cereus imbricatus Haw.] Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 73 () [P. Roetter]
 
718012 369608 Echinocactus simpsonii Engelm. G. Engelmann, see 309: t. 1 (1876) [P. Roetter]
 
718022 369608 Echinocactus simpsonii Engelm. G. Engelmann, see 309: t. 2 (1876) [P. Roetter]
 
718036 1189135 Micropuntia pulchella (Engelm.) M.P.Griff. [125 720723 Opuntia pulchella Engelm.] G. Engelmann, see 309: t. 3 (1876) [P. Roetter]
 
859272 369608 Echinocactus simpsonii Engelm. G. Engelmann, Rep. Bot. Exped. Capt. Simpson Utah: t. 1 (1876) [P. Roetter]
 
859282 369608 Echinocactus simpsonii Engelm. G. Engelmann, Rep. Bot. Exped. Capt. Simpson Utah: t. 2 (1876) [P. Roetter]