| species | acanthocarpa Engelm. & J.M. Bigelow * | 2 | |
 | species | aciculata Griffiths * | | |
 | species | anahuacensis Griffiths * | | |
 | species | andicola Pfeiff. * | | |
 | species | arcei Cárdenas * | | • |
 | species | arechavaletae Speg. * | | |
 | species | arenaria Engelm. * | | |
 | species | argentina Griseb. * | | |
 | species | arrastradillo Backeb. * | | |
 | species | articulata (Pfeiff.) D.R. Hunt * | | |
 | species | basilaris Engelm. & J.M. Bigelow * | 1 | |
 | species | bergeriana F.A.C. Weber ex A. Berger * | | |
 | species | bigelovii Engelm. * | | |
 | species | boliviana Salm-Dyck * | | |
 | species | brachyarthra Engelm. & J.M. Bigelow * | | |
 | species | brachyclada Griffiths * | | |
 | species | brachydelphys (K. Schum.) K. Schum. * | | |
 | species | brasiliensis (Willd.) Haw. * | | |
 | species | bravoana Baxter * | | |
 | species | brittonii González Ortega, Jesús * | | • |
 | species | brunneogemmia (F. Ritter) Schlindw. * | | |
 | species | brunnescens Britton & Rose * | | |
 | species | camuessa F.A.C. Weber * | | |
 | species | cantabrigiensis Lynch * | | |
 | species | chinensis (Roxb.) K. Koch * | | • |
 | species | chlorotica Engelm. & J.M. Bigelow * | | |
 | species | cholla F.A.C. Weber * | | |
 | species | cochenillifera (L.) Mill. * | | • |
 | species | compressa J.F. Macbr. * | 1 | • |
 | species | conoidea (F. Ritter) G.D. Rowley * | | |
 | species | cordobensis Speg. * | | • |
 | species | cuija (Griffiths & Hare) Britton & Rose * | | |
 | species | cylindrarticulata (Cárdenas) G.D. Rowley * | | |
 | species | dactylifera Vaupel * | | |
 | species | dillenii (Ker Gawl.) Haw. * | | |
 | species | dimorpha C.F. Först. * | | |
 | species | discata Griffiths * | | |
 | species | echinocarpa Engelm. & J.M. Bigelow * | 3 | |
 | species | ellemeetiana Miq. * | | |
 | species | emoryi Engelm. * | | |
 | species | engelmannii Salm-Dyck ex Engelm. * | 9 | |
 | species | erinacea Engelm. & J.M. Bigelow * | 2 | |
 | species | exaltata A. Berger * | | |
 | species | ficus-indica (L.) Mill. * | | • |
 | species | flexuosa (Backeb.) G.D. Rowley * | | |
 | species | floccosa Salm-Dyck * | | |
 | species | fragilis (Nutt.) Haw. * | 2 | |
 | species | frigida (F. Ritter) G. Navarro * | | |
 | species | frutescens Engelm. * | 2 | • |
 | species | fulgida Engelm. * | | |
 | species | glaucescens Salm-Dyck * | | |
 | species | glomerata Haw. * | 1 | |
 | species | gorda Griffiths * | | |
 | species | gosseliniana F.A.C. Weber * | | |
 | species | gracilis Pfeiff. * | | • |
 | species | grandis Pfeiff. * | | |
 | species | guerrana Griffiths * | | |
 | species | heliae Matuda * | | |
 | species | hernandezii DC. * | | |
 | species | hildemanii Frič * | | |
 | species | humifusa (Raf.) Raf. * | 1 | • |
 | species | hypogaea Werderm. * | | |
 | species | hystricina Engelm. & J.M. Bigelow * | 1 | |
 | species | ignescens Vaupel * | | |
 | species | imbricata (Haw.) DC. * | | |
 | species | inermis (DC.) DC. * | | |
 | species | invicta Brandegee * | | |
 | species | kunzei Rose * | 1 | |
 | species | larreyi F.A.C. Weber ex Coult. * | | |
 | species | leoncito Werderm. * | | |
 | species | leptocaulis DC. * | 6 | • |
 | species | leucophaea Phil. * | | |
 | species | leucotricha DC. * | | |
 | species | lindheimeri Engelm. * | 6 | |
 | species | linguiformis Griffiths * | | |
 | species | littoralis (Engelm.) Cockerell * | | |
 | species | macrocentra Engelm. * | 1 | |
 | species | macrorhiza Engelm. * | | |
 | species | maihuen Gay * | | |
 | species | marnieriana Backeb. * | | |
 | species | maxonii J.G. Ortega * | | |
 | species | megacantha Salm-Dyck * | | • |
 | species | melanosperma Svenson * | | |
 | species | mesacantha Raf. * | 1 | • |
 | species | microdasys (Lehm.) Pfeiff. * | | |
 | species | miquelii Monv. * | | |
 | species | missouriensis DC. * | 2 | |
 | species | molesta Brandegee * | | |
 | species | molfinoi (Speg.) Werderm. * | | |
 | species | monocantha (Willd.) Haw. * | 1 | |
 | species | nicholii L.D. Benson * | | |
| species | × occidentalis Engelm. & J. M. Bigelow (pro sp.) * | 1 | |
 | species | orbiculata Salm-Dyck ex Pfeiff. * | | |
 | species | oricola Philbrick * | | |
 | species | ovallei Gay * | | |
 | species | palmeri Engelm. ex J.M. Coult. * | | |
 | species | pampeana Speg. * | | |
 | species | papyracantha Phil. * | | |
 | species | paraguayensis K. Schum. * | | • |
 | species | parishii Orcutt * | | |
 | species | parvispina Salm-Dyck * | | |
 | species | patagonica Phil. * | | |
 | species | phaeacantha Engelm. * | 1 | |
| species | phyllanthus (L.) Mill. * | | |
 | species | poeppigii Otto & Pfeiff. * | | |
 | species | polyacantha Haw. * | 6 | |
 | species | prolifera Engelm. * | | |
 | species | puberula Pfeiff. * | | |
 | species | puelchana A. Cast. * | | |
 | species | pulchella Engelm. * | | |
 | species | ramosissima Engelm. * | | |
 | species | ramulifera Salm-Dyck * | | • |
 | species | rhodantha K. Schum. * | | |
 | species | riviereana Backeb. * | | |
 | species | robusta J.C. Wendl. * | 2 | |
 | species | rutila Nutt. * | | |
 | species | scheeri F.A.C. Weber * | | |
 | species | segethii F. Phil. * | | |
 | species | semispinosa Griffiths * | | |
 | species | shreveana C.Z. Nelson * | | |
 | species | sphaerica C.F. Först. * | | |
 | species | spinosior (Engelm.) Toumey * | | |
 | species | stanlyi Engelm. ex B.D. Jacks. * | 4 | |
 | species | stenopetala Engelm. * | | |
 | species | stricta (Haw.) Haw. * | 1 | |
 | species | subulata (Muehlenpf.) Engelm. * | | |
 | species | sulphurea Gillies ex Salm-Dyck * | | |
 | species | tarapacana Phil. * | | |
 | species | tardospina Griffiths * | | |
 | species | tessellata Engelm. * | 1 | |
 | species | thurberi Engelm. * | | |
 | species | tomentosa Salm-Dyck * | 1 | |
 | species | tortispina Engelm. & J.M. Bigelow * | | |
 | species | trichophora (Engelm. & J.M. Bigelow) Britton & Rose * | | |
 | species | tunicata (Lehm.) Pfeiff. * | | |
 | species | ursina F.A.C. Weber * | | |
 | species | vaginata Engelm. * | | • |
 | species | violacea Engelm. * | | |
 | species | violacea Engelm. ex B.D. Jacks. * | 3 | |
 | species | vulgaris auct. * | | • |
 | species | vulgaris Mill. * | | • |
 | species | vulpina F.A.C. Weber * | | |
 | species | whipplei Engelm. & J.M. Bigelow * | 3 | |
 | species | whitneyana E.M. Baxter * | | |
 | species | wigginsii L.D. Benson * | | |
 | species | wilkeana (Backeb.) G.D. Rowley * | | |
 | species | wrightiana (E.M. Baxter) Peebles * | | |