Vaccinium nubigenum Fernald                                                                        Isotype

Valeriana amplexicaulis F. G. Meyer                                                             Isotype

Valeriana dubiosa Gandoger                                                                           Isotype

Valeriana macropoda Greenman                                                                     Isotype

Valeriana occidentalis A. A. Heller                                                                 Isotype

Valeriana retrorsa Fernald                                                                              Isotype

Valerianella congesta var. trigona Suksdorf                                                   Isotype

Vatica brevipes Ashton                                                                                   Isotype

Veratrum caudatum var. tenuipetaloides Loes f.                                            Isotype

Verbena ambrosifolia Rydberg                                                                       Holotype

Verbena ciliata Bentham                                                                                 Isotype

Verbena inconspicua Greene                                                                           Isosyntype

Verbena inconspicua Greene                                                                           Isosyntype

Verbena leucanthemifolia Greene                                                                   Isotype

Verbena plicata Greene                                                                                   Isotype

Verbena pubera Greene                                                                                  Isosyntype

Verbena quadrangulata Heller                                                                        Isotype

Verbena wrightii Gray                                                                                     Isotype

Verbesina badilloi J. L. Panero                                                                        Isotype

Verbesina caymanensis G. R. Proctor                                                             Isotype

Verbesina chihuahuensis A. Gray                                                                   Isotype

Verbesina coahuilensis var. viridior Robinson & Greenman                            Isotype

Verbesina costata Fay                                                                                     Isotype

Verbesina cronquistii B. L. Turner                                                                  Isotype

Verbesina gracilipes Robinson                                                                        Isotype

Verbesina hygrophila Panero & Villasenor                                                      Isotype

Verbesina hygrophila Panero & Villasenor                                                      Isotype

Verbesina hypomalaca var. hypochlora Robinson & Greenman                      Isosyntype

Verbesina molinaria Robinson & Greenman                                                    Isotype

Verbesina montanoifolia var. leptopoda Robinson                                         Isotype

Verbesina oncophora Robinson & Seaton                                                       Isosyntype

Verbesina papasquiara J. L. Panero & J. L. Vallasenor                                   Isotype

Verbesina pellucida Villasenor & Panero                                                         Isotype

Verbesina serrata Cav. var. pringlei Robinson & Greenman                             Isotype

Verbesina sousae J. J. Fay                                                                               Isotype

Verbesina stenophylla Greenman                                                                    Isotype

Verbesina strotheri J. L. Panero & J. L. Villasenor                                          Isotype

Verbesina tapantiana L. J. Poveda & B. Hammel                                           Isotype

Verbesina trilobata Robinson & Greenman                                                     Isotype

Verbesina villasenorii B. L. Turner                                                                  Isotype

Vernonia dictyophlebia Gleason                                                                      Isotype

Vernonia guadalupensis Heller                                                                        Isotype

Veronica allenii Greenman                                                                              Isotype

Veronica anagallis-aquatica var. terrea Farwell                                             Isolectotype

Viburnum caudatum Greenman                                                                       Isotype

Viburnum ciliatum Greenman                                                                          Isotype

Viburnum cuneifolium Bartlett                                                                        Isotype

Viburnum microcarpum var. evanescens Greenman                                       Isotype

Vicia americana var. pallida Suksdorf                                                            Isotype

Vicia pumila Heller                                                                                          Isotype

Viguiera davilae Panero & Villasenor                                                              Isotype

Viguiera grammatoglossa var. huajuapana Panero & Villasenor                    Isotype

Viguiera linearis var. genuina forma latiorifolia Blake                                    Isotype

Viguiera microcephala Greenman                                                                   Isotype

Viguiera neocronquistii (B. Turner) B. Turner                                                 Isotype

Viguiera palmeri var. rzedowski McVaugh                                                     Isotype

Viguiera pazensis Rusby                                                                                  Isotype

Viguiera pinnatiloba var. megaphylla Butterwick ex B.L. Turner                    Isotype

Viguiera pringlei Robinson & Greenman                                                         Isosyntype

Viguiera squarrosa Greenman                                                                         Isotype

Viguiera subcanescens S. F. Blake                                                                  Isotype

Viguiera trachyphylla S. F. Blake                                                                   Isotype

Vincetoxicum crenatum Vail                                                                           Isotype

Viola conspersa var. masonii Farwell                                                              Unknown

Viola jalapaenis W. Becker                                                                            Isotype

Viola nuevo-leonensis W. Becker in Fedde                                                     Isotype

Vitex pyramidata Robinson                                                                             Isosyntype