Dahlia dissecta S. Watson Isotype
Dahlia pubescens S. Watson Isotype
Dalea capitata S. Watson Isotype
Dalea glaberrima S. Watson Isotype
Dalea unifoliata Robinson & Greenman Isotype
Dalechampia magnistipulata Webster & Armbruster Isotype
Dasylirion inerme Watson Isotype
Datura pruinosa Greenman Isotype
Deanea longibracteata Coulter & Rose Isosyntype
Deanea nudicaulis Coulter & Rose Isosyntype
Deanea pringlei Rose Isotype
Deanea tuberosa Coulter & Rose Isotype
Delissea undulata ssp. kauaiensis Lammers Holotype
Delphinium roseum Heller Isotype
Dentaria incisa Eames Isosyntype
Deppea microphylla Greenman Isotype
Deschampsia chapmani Petrie Unknown
Deschampsia pringlei Scribner Isotype
Desmanthodium lanceolatum Greenman Isotype
Desmodium amans Watson Isotype
Desmodium bellum (Blake) Schubert Isotype
Desmodium jaliscanum var. obtusum Robinson Isotype
Desmodium spirale var. transversum Robinson & Greenman Isosyntype
Desmodium subspicatum Watson Isotype
Deyeuxia junciformis H.B.K. Isotype
Deyeuxia lactea Suksdorf Unknown
Deyeuxia pringlei Scribn. Unknown
Deyeuxia tolucensis H.B.K. Isotype
Dicerandra christmanii Huck & Judd Isotype
Dicerandra odoratissima Harper Isotype
Dichondra recurvata Tharp & Johnston Isotype
Dichromena rigidifolia Gilly Holotype
Dicliptera pringlei Greenman Isosyntype
Didymiandrum flexifolium Gilly Holotype
Dilkea magnifica Steyermark Isotype
Dillenia elmeri Merr. Isotype
Dioscorea cyphocarpa B. L. Robinson Unknown
Dioscorea hirsuticaualis Robinson Isotype
Dioscorea lobata var. morelosana Uline Isotype
Dioscorea minima Robinson & Seaton Isotype
Dioscorea platycolpota Uline Isotype
Dioscorea plumifera Robinson Isotype
Dioscorea pringlei Robinson Isotype
Dioscorea ulinei Greenman Unknown
Dioscorea urceolata var. reflexa Greenman Isosyntype
Diospyros atra Merr. Isotype
Diphysa macrophylla Lundell Isotype
Diphysa minutifolia Rose Isotype
Diplazium beamanii M. G. Price Isotype
Dirca mexicana G. L. Nelson & Mayfield Isotype
Dodecatheon puberulentum Heller Isotype
Dodecatheon tetrandum Suksdorf Isotype
Donnellsmithia biennis (Coult.&Rose) Mathias & Const. Isotype
Draba beamanii Rollins Isotype
Draba cocuyana Al-Shehbaz Isotype
Draba cusickii Robinson Isosyntype
Draba helleriana var. potosiensis Rollins Isotype
Draba orbiculata Rose Isotype
Draba pringlei Rose Isotype
Draba unilateralis Jones Isotype
Drymaria depressa Greene Isotype
Drymaria miniuscula Standl. & Steyerm. Isotype
Dryopteris maxoni Underwood & C. Chr. Unknown
Drypetes monachinoi Jabl. Isotype
Drypetes palawanensis var. parvifolia Merr. Isosyntype
Dyschoriste pringlei Greenman Isosyntype
Dyssodia mutica M. C. Johnston Isotype
Dyssodia pinnata (Cav.) Robins. var. glabrescens Strother Isotype