Tagetes epapposa B. L. Turner Isotype
Tagetes heterocarpha Rydberg Isotype
Tagetes jaliscensis Greenman Isotype
Tagetes stenophylla Robinson Isotype
Tagetes stenophylla Robinson Isotype
Tagetes triradiata Greenman Isotype
Talinum greenmannii Harshberger Isotype
Tanacetum bajacalifornicum Moran Isotype
Taonabo pringlei Rose Isotype
Tauschia alpina Mathias Isotype
Tauschia humilis Coult. & Rose Isotype
Tephrosia macrantha Robinson & Greenman Isotype
Terebinthus biflora Rose Isotype
Ternstroemia pringlei (Rose) Standley Isotype
Tetradymia spinosa var. longispina Jones Isotype
Tetraneuris angustata Greene Isotype
Tetraplasandra sherfii Degner & I. Degener Unknown
Teucrium nashii
Thalesia purpurea Heller Isotype
Thalictrum cuernavacanum Rose Isosyntype
Thalictrum grandiflorum Rose Isotype
Thalictrum pachucensis Rose Isotype
Thalictrum pringlei Watson Isotype
Thalictrum stipitatum Rose Isotype
Thalictrum subpubescens Rose Isotype
Thalictrum tomentellum Robinson & Seaton Isotype
Thelesperma curvicarpum Melchert Isotype
Thelypodium anisopetalum Greene Isotype
Thelypodium crispum Greene Isotype
Thelypodium elegans M. E. Jones Unknown
Themistoclesia alata Luteyn Isotype
Thenardia gonoloboides R. E. Woodson Isotype
Thouinia acuminata Watson Isotype
Thouinia portoricensis Radlkofer Syntype
Thouinia pringlei Watson Isotype
Thouinia striata Radlkofer Isolectotype
Thouinia striata Radlkofer Syntype
Thouinidium inaequilaterum Alain Liogier Isotype
Thysanocarpus desertorum Heller Isotype
Tigridia alpestris Molseed Isotype
Tigridia molseediana
Tigridia morelosana Robinson Isotype
Tigridia vanhouttei ssp. vanhouttei Molseed Isotype
Tilia pringlei Rose ex Bush Unknown
Tillandsia cretacea L. B. Smith Isotype
Tissa luteola Greene Isotype
Tournefortia potosina Standl. Isotype
Townsendia alpigena Piper Isotype
Townsendia aprica Welsh & Reveal Isotype
Townsendia mensana M. E. Jones Isotype
Townsendia smithii Shultz & Holmgren Isotype
Toxicodendron radicans ssp. barkleyi Gillis Holotype
Tradescantia angustifolia Robinson Isotype
Tradescantia brachyphylla Greenman Isotype
Tradescantia macrophylla Greenman Unknown
Tradescantia macropoda Greenman Isotype
Tricarpha durangensis Longpre Holotype
Trichilia pringlei Rose Unknown
Trichostema suffrutescens
Tridax accedens S. F. Blake Holotype
Tridax palmeri var. indivisa B. L. Robinson & Seaton Isotype
Tridax platyphylla B. L. Robinson Isotype
Trifolium amphianthum Torr. & Gray Unknown
Trifolium anodon Greene Isotype
Trifolium arcuatum var. cusickii Piper Isotype
Trifolium decodon Greene Isotype
Trifolium multicaule M. Jones Unknown
Trifolium schneideri Standley Unknown
Trifolium splendens Heller Isotype
Trifolium trichocalyx Heller Isotype
Trifolium virginicum Small Unknown
Triglochin maritimum L. var. debile Jones Isotype
Trigonospermum floribundum Greenman Isosyntype
Trigonospermum floribundum Greenman Isosyntype
Triodia australis Petrie Unknown
Triodia eragrostoides Vasey & Scribner Isosyntype
Triodia nealleyi Vasey Isotype
Tripogandra silvatica Handlos Isotype
Tripsacum dactyloides var. angustifolium Scribn. in Urbina Unknown
Trisetum deyeuxioides var. pubescens Scribner Isotype
Trisetum filifolium Scribner Isotype
Trisetum filifolium var. aristatum Scribner Isotype
Trisetum ludovicianum Vasey Unknown
Triumfetta cucullata Fernald Isotype
Trixis hyposericea S. Watson Isotype
Trixis longifolia var. sericea Robinson & Greenman Isotype
Turnera pringlei Rose Isotype