Cacalia ampullacea Greenman Isotype
Cacalia megaphylla Robinson & Greenman Isotype
Cacalia michoacana Robinson Isotype
Cacalia paucicapitata Robinson & Greenman Isotype
Cacalia peltata var. conzatti Robinson & Greenman Isosyntype
Cacalia suffulta Greenman Isotype
Caesalpinia multiflora Robinson Isotype
Caesalpinia murifructa Gillis & Proctor Isotype
Calamagrostis fernaldii Louis-Marie Isotype
Calamagrostis pringlei Scribner Isotype
Calamagrostis scopulorum Jones Isotype
Calea pringlei B. L. Robinson Isotype
Calhounia nelsonae A. Nelson Isotype
Calliandra densifolia Rose ex Harms in Fedde Unknown
Callicarpa acuminata var. pringlei (Briq.) Moldenke Isotype
Callitriche anceps Fernald Isotype
Calocarpum huastecanum Gilly Isotype
Calochortus exilis Painter Isotype
Calochortus pringlei B. L. Robinson Isotype
Calochortus pringlei Robinson Isotype
Calyptranthes capitata Proctor Isotype
Capparis pringlei Briq. Isotype
Carex allomacrus Steudel Holotype
Carex ciliaris Fernald Isotype
Carex cochranei Reznicek Isotype
Carex consors C.B. Clarke Isotype
Carex cooleyi Dewey Isotype
Carex digitalis var. copulata Isotype
Carex durangensis Reznicek & S. Gonzalez Holotype
Carex georgiana Dewey Holotype
Carex guatemalensis F. J. Hermann Isotype
Carex haermannii Cochrane Isotype
Carex inciso-dentata Steudel Holotype
Carex intumescens var. fernaldi Bailey Isotype
Carex jemtlandica var. kainuensis Palmgr. Isotype
Carex juniperorum P. M. Catling, Reznicek, & Crins Isotype
Carex lacunarum Holm Isosyntype
Carex macloviana D'Urville Holotype
Carex michigansis Dewey Isotype
Carex nudata S. Wats. Isosyntype
Carex nudata S. Wats. Isosyntype
Carex nudata S. Wats. Isosyntype
Carex orizabae Liebmann Holotype
Carex ouachitana R. Kral, Manhart & Bryson Unknown
Carex ouachitana R. Kral, Manhart & Bryson Unknown
Carex ovalis Goodenough Syntype
Carex ovalis Goodenough Syntype
Carex perlonga Fernald Isotype
Carex pinetorum var. elatior Kuk. Isotype
Carex pringlei Bailey Isotype
Carex propinqua Nees & Meyen Holotype
Carex rosea var. minor forma debilis Farw. Isolectotype
Carex rosea var. minor forma debilis Farw. Syntype
Carex scirpoidea var. convoluta Kukenthal in Engler Isolectotype
Carex scirpoidea var. stenochlaena Holm Isolectotype
Carex seatoniana Bailey Isotype
Carex tenuiflora var. setacea Kuk. Isotype
Carex turgidula Bailey Isosyntype
Carex volcanica F. J. Herm. Isotype
Carex vulpinoidea var. segregata Farwell Isotype
Carlowrightia glabrata Fernald Isolectotype
Carlowrightia glandulosa B.L. Robinson & Greenman Isotype
Carlowrightia lanceolata Leonard Isotype
Carlowrightia pringlei Robinson & Greenman Isotype
Casearia pringlei Briquet Isotype
Casearia subsessiliflora Lundell Unknown
Casparea lunarioides A. Gray ex Britt. & Rose Isotype
Cassia depressa Pollard Isotype
Cassia leptadenia Greenman Isosyntype
Cassia longicoma Greenman Unknown
Cassia multipinnata Pollard Isosyntype
Cassia multipinnata var. nashii Pollard Isotype
Cassia tortuosa L.B. Sm. & B.G. Schub. Isotype
Cassia unijuga Rose Isotype
Castanopsis dispersispina Merr. Isotype
Castilleja angustata (Robinson & Seaton) Eastwood Isotype
Castilleja aurea Robinson & Greenman Isotype
Castilleja christii N. H. Holmgren Isotype
Castilleja ctenodonta Eastwood Isotype
Castilleja cusickii Greenman Isotype
Castilleja dissitiflora N. Holmgren Isotype
Castilleja falcata Eastwood Isotype
Castilleja glandulosa Greenman Isotype
Castilleja kaibabensis N. Holmgren Isotype
Castilleja lutea A. A. Heller Unknown
Castilleja macrostigma Robinson Isotype
Castilleja nitricola Eastwood Isotype
Castilleja oreopola Greenman Isosyntype
Castilleja oreopola Greenman Isosyntype
Castilleja pallida var. angustata Robinson & Sea. Isotype
Castilleja pallida var. lutescens Greenm. Isotype
Castilleja pratensis Heller Isotype
Castilleja pringlei Fernald Isotype
Castilleja salsuginosa N. Holmgren Isotype
Castilleja schaffneri var. cinerascens Eastwood Isotype
Cathestecum brevifolium Swallen Isotype
Cavendishia melastomoides var. albiflora Luteyn Isotype
Ceanothus bakeri Greene ex McMinn Unknown
Ceiba pallida Rose Unknown
Celastrus pringlei Rose Isotype
Celastrus tetramerus Standley Isotype
Celianella montana Jablonski Isotype
Celtis platycaulis Greenman Isotype
Cenchrus palmeri Vasey Unknown
Centaurium pusillum Eastwood Isotype
Centropogon iruazensis Wilbur Isotype
Cephalocarpus maguirei Gilly Isotype
Cephalocarpus rigidus Gilly Isotype
Cephalocarpus rigidus var. mucronatus Holotype
Cephalocarpus steyermarkii Gilly Isotype
Cerastium cuchumatanense Good Holotype
Cerastium molle Bartl. in Presl Photograph
Cerastium sordidum Robinson Isotype
Cerastium tolucense Good Holotype
Cestrum flavescens Greenman Isotype
Chaetochloa glauca var. purpurea Farw. Isolectotype
Chaetochloa grisebachii var. ampla Scribner & Merrill Isosyntype
Chaetochloa macrospermum Scribner & Merrill Isosyntype
Chamaecrista puberula Greene Isotype
Chamaenerion angustifolium var. platyphyllum Daniels Holotype
Chamaesyce proctorii Burch Isotype
Chaptalia lyratifolia Burkart Isotype
Chaptalia madrensis G. L. Nesom Isotype
Chaptalia monticola Green Isotype
Cheilanthes chipinquensis Knobloch & Lellinger Holotype
Cheilanthes chipinquensis Knobloch & Lellinger Isotype
Cheilanthes mexicana Davenp. Unknown
Chloris brevispica Nash Isotype
Chloris neglecta Nash Isotype
Chloris tenuispica Nash Isotype
Chomelia pringlei Watson Isotype
Chrysactinia pinata S. Watson Isotype
Chrysactinia pinnata S. Watson Isotype
Chrysactinia truncata Watson Isotype
Chrysanthellum mexicanum Greenman Syntype
Chrysanthemum mexicanum H.B.K. Holotype
Chrysopsis flexuosa Nash Isotype
Chrysothamnus nauseosus ssp. arenarius L. Anderson Isotype
Chrysothamnus nauseosus ssp. nitidus L. Anderson Isotype
Chrysothamnus parryi ssp. montanus L. Anderson Isotype
Chrysothamnus parryi ssp. salmonensis L. C. Anderson Isotype
Chrysothamnus spathulatus L.C. Anderson Isotype
Chrysothamnus viscidiflorus ssp. planifolius L. C. Anderson Isotype
Chusquea perotensis L.G. Clark, G.Cortes & M. Chazaro Isotype
Cirsium acantholepis var. heterolepis Petrak Isotype
Cirsium anartiolepis Petrak Isotype
Cirsium greenei Petrak Isosyntype
Cirsium jorullense ssp. jorullense ssp. lanosum Petrak Isotype
Cirsium jorullense ssp. jorullense var. glabrescens Petrak Isotype
Cirsium jorullense ssp. jorullense var. pilosum Petrak Isotype
Cirsium pinetorum Greenman Isotype
Cirsium pitcheri forma magenteum E.G. Voss Isotype
Citharexylum berlandieri Robinson Isotype
Citharexylum hidalgense Moldenke Isotype
Citharexylum ovatifolium Greenman Isotype
Citharexylum pringlei Greenman Isotype
Cladocolea gracilis Kuijt Isotype
Cladocolea pringlei Kuijt Isotype
Claytonia deltoidea Greene ex C.F. Baker Unknown
Claytonia depressa var. arenaria Suksdorf Isotype
Claytonia depressa var. latifolia Suksdorf Isotype
Claytonia depressa var. sylvatica Suksdorf Isotype
Claytonia parviflora var. hydrophila Suksdorf Isotype
Claytonia rhomboidea Greene ex C.F. Baker Unknown
Claytonia rubra (Howell) Tidestr. Unknown
Claytonia spathulata var. disciformis Suksdorf Isotype
Claytonia washingtoniana Suksdorf Isotype
Cleomella palmerana M. E. Jones Isotype
Clethra alcoceri Greenman Isotype
Clethra pringlei S. Watson Isotype
Cnicus calcareus M. E. Jones Isosyntype
Cnicus clavatus Jones Isotype
Cnicus excelsior Robinson Isotype
Cnicus imbricatus Robinson & Greenman Isotype
Cnicus linearifolius Watson Isotype
Cnicus lomatolepis Hemsl. Isotype
Cnicus pringlei Watson Isotype
Cnicus tolucanus Robinson & Seaton Isotype
Cnicus velatus Watson Isotype
Colobanthus quitensis Bartl. Photograph
Colobanthus saginoides Bartl. Photograph
Cologania jaliscana Watson Isotype
Combretum elmeri Merrill Isotype
Commelina swingleana Nash Isotype
Conanthus parviflorus Greenman Isosyntype
Convolvulus incanus var. glabratus Farw. Isotype
Conyza erythrolaena Klatt Isotype
Corallorrhiza macrantha Schlechter Lectotype
Corallorrhiza pringlei Greenman Isolectotype
Cordia pringlei B.L. Robinson Isotype
Coreopsis cuneifolia Greenman Syntype
Coreopsis davilae Panero & Villasenor Isotype
Coreopsis oaxacensis B. L. Turner Isotype
Coreopsis pringlei Robinson Isotype
Cornus microcarpa Nash Isotype
Cotyledon parviflora var. squamulosa Watson Isotype
Cotyledon subrigida Robinson & Seaton Isotype
Coulterophytum brevipes J. M. Coult. & Rose Isotype
Coulterophytum laxum Robinson Isotype
Cracca cuernavacana Rose Isotype
Cracca floridana Vail Isosyntype
Cracca pringlei Rose Isotype
Cranichis thysanochila Robinson & Greenman Isotype
Crataegus baroussana Eggleston Isotype
Crataegus blanchardii Sargent Isosyntype
Crataegus brittonii Eggleston Isotype
Crataegus contigua Sargent Unknown
Crataegus dodgei Ashe Neotype
Crataegus edsonii Sargent Isosyntype
Crataegus flava var. integra Nash Isotype
Crataegus gaylussacia Heller Isotype
Crataegus incisa Sargent Isotype
Crataegus insolens Sargent Isotype
Crataegus insolens Sargent Isotype
Crataegus jackii Sargent Unknown
Crataegus jesupi Sargent Unknown
Crataegus prantensis Sargent Unknown
Crataegus pratensis Sargent Unknown
Crataegus scabrida Sargent Unknown
Crataegus scabrida Sargent Unknown
Crataegus tracyii Ashe Isotype
Cressa aphylla Heller Isotype
Crotalaria filifolia Rose Isotype
Croton calvescens Watson Isosyntype
Croton elaeagnoides Watson Isotype
Croton flavescens Greenman Isotype
Croton floridanus Ferguson Isosyntype
Croton kaieturi Jablonski Isotype
Croton longipes Jones Isosyntype
Croton monachinoensis Jablonski Isotype
Croton rusbyi Britton Isosyntype
Crotonopsis spinosa Nash Isotype
Crusea calcicola Greenman Isotype
Crusea villosa Watson Isotype
Cryptantha hispidula Greene ex Brand Unknown
Cryptantha weberi Johnston Isotype
Cryptocarya calelanensis Elmer Unknown
Cuchumatanea steyermarkii Seidenschnur & Beaman Holotype
Cuphea avigera Robinson & Seaton Isotype
Cuphea cuernavaca Rose Isotype
Cuphea imberbis Rose in Koehne Isotype
Cuphea imberbis Rose in Koehne Isotype
Cuphea koehneana Rose Isotype
Cuphea lozanii Rose Isotype
Cuphea painteri Rose in Koehne Isosyntype
Cuphea pringlei Watson Isotype
Cuphea reipublicae Robinson & Seaton Isotype
Cuphea squamuligera forma brachypoda Koehne Isotype
Cuphea viscosa Rose Isotype
Cuphea watsoniana Koehne Isotype
Cuphea watsonii M. E. Jones Isotype
Cupressus sargentii var. duttonii Jepson Isotype
Cuscuta pringlei Yuncker Isotype
Cyclanthera pringlei Robinson & Seaton Isotype
Cymophora pringlei Robinson Isotype
Cynometra lukei H.J. Beentje Isotype
Cynthia falcata Standley Isotype
Cynthia falcata Standley Isotype
Cynthia falcata Standley Isotype
Cyperus orbicephalus (Beetle) T. Koyama & McVaugh Isolectotype
Cyperus pseudovegetus var. megalanathus Kukenthal Isolectotype
Cyrtandra beamanii B. L. Burtt Isotype
Cyrtandra gayana Heller Isotype