Idiopappus quitensis H. Robinson & Panero                                                    Isotype

Indigofera cuernavacana Rose                                                                       Isotype

Indigofera platycarpa Rose                                                                            Isotype

Inga boliviana Britton                                                                                      Isotype

Ionoxalis alpina Rose                                                                                      Isotype

Ionoxalis bipartita Rose                                                                                  Isotype

Ionoxalis furcata Rose                                                                                    Isotype

Ionoxalis gregaria Rose                                                                                  Isotype

Ionoxalis jaliscana Rose                                                                                 Isotype

Ionoxalis macrocarpa Small                                                                            Isotype

Ionoxalis madrensis Rose ex Small                                                                  Isotype

Ionoxalis obliqua Rose                                                                                    Isotype

Ionoxalis obliqua Rose                                                                                    Isotype

Ionoxalis pringlei Rose                                                                                   Isotype

Ionoxalis quadriglandula Rose                                                                       Isotype

Ionoxalis rupestris Small                                                                                 Isotype

Ionoxalis stipitata Rose                                                                                  Isotype

Ionoxalis trinervia Rose                                                                                  Isotype

Ionoxalis vallicola Rose                                                                                  Isotype

Iostephane heterophylla var. acutiloba W. M. Sharp                                      Isotype

Ipomoea amplexicaulis Fernald                                                                       Isotype

Ipomoea bracteata var. pubescens Robinson & Greenman                              Isotype

Ipomoea caudata Fernald                                                                                Isotype

Ipomoea dimorphophylla Greenman                                                               Isosyntype

Ipomoea igualensis Weatherby                                                                        Isotype

Ipomoea perlonga B. L. Rob.                                                                          Unknown

Ipomoea pringlei Gray                                                                                    Isotype

Ipomoea stans var. hirsuta Robinson                                                               Isosyntype

Ipomoea tentaculifera Greenman                                                                    Isotype

Ipomopsis pringlei (Gray) J. Henrickson                                                          Isotype

Iresine discolor Greenman                                                                               Isosyntype

Isodendrion subsessilifolium Heller                                                                 Isotype

Isoetes mexicana Underwood                                                                         Unknown

Isoetes montezumae A. A. Eaton                                                                     Isotype

Iva nevadensis M. E. Jones                                                                             Isotype

Ivesia sabulosa M. E. Jones                                                                            Isotype