Ageratum glaucum Hort. (original description)
Ageratum mexicanum f. lasseauxii (Carrière) Voss accepted as Ageratum houstonianum Mill. (original description)
Ageratum mexicanum var. majus Voss accepted as Ageratum houstonianum Mill. (original description)
Ageratum mexicanum var. wendlandii Voss accepted as Ageratum houstonianum Mill. (original description)
Anthemis frutescens Hort. (original description)
Anthemis purpurea Hort. (original description)
Anthemis semperflorens Hort. (original description)
Artemisia biebersteinii Hort. (original description)
Aster diffusus f. bifrons (Lindl. ex DC.) Voss (original description)
Aster ericoides f. villosus (Torr. & A.Gray) Voss accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom (original description)
Aster meyendorffii (Regel & Maack) Voss accepted as Kalimeris hispida (Thunb.) Nees (original description)
Aster novae-angliae f. spurius (Willd.) Voss accepted as Symphyotrichum novae-angliae (L.) G.L.Nesom (original description)
Aster salicifolius f. coerulescens (DC.) Voss (original description)
Aster salicifolius f. obliquus (Nees) Voss (original description)
Aster salicifolius f. subasper (Lindl. ex Hook.) Voss accepted as Symphyotrichum praealtum var. subasperum (Lindl.) G.L.Nesom (original description)
Baeria coronaria f. anthemoides (Nutt.) Voss accepted as Lasthenia coronaria (Nutt.) Ornduff (original description)
Baeria coronaria f. mutica (Nutt.) Voss accepted as Hymenoxys mutica (Nutt.) Torr. & A.Gray (original description)
Calendula ranunculodes Hort. (original description)
Catananche bicolor Hort. (original description)
Chrysanthemum camphoratum (Less.) Voss accepted as Tanacetum bipinnatum (L.) Sch.Bip. (original description)
Chrysanthemum matricariodes Hort. (original description)
Chrysanthemum partheniodes (Bernh.) Voss accepted as Anthemis parthenioides Benth. ex Hornem. (original description)
Conoclinium grandiflorum Hort. (original description)
Coreopsis bigelovii (A.Gray) Voss accepted as Coreopsis bigelovii (A.Gray) H.M.Hall (original description)
Coreopsis bigelowii (A.Gray) Voss (original description)
Coreopsis elegans Hort. (original description)
Coreopsis grandiflora f. longipes (Hook.) Voss accepted as Coreopsis grandiflora Hogg ex Sweet (original description)
Coreopsis picta Hort. (original description)
Cosmos atrosanguineus (Hook.) Voss (original description)
Crassocephalum haematophyllum (DC.) Voss accepted as Gynura haematophylla DC. (original description)
Dahlia mexicana Hort. (original description)
Dahlia pinnata var. cervantesii (Lag. ex Sweet) Voss accepted as Dahlia coccinea Cav. (original description)
Dahlia pinnata var. coccinea (Cav.) Voss accepted as Georgina coccinea (Cav.) Willd. (original description)
Dahlia pinnata var. gracilis (Ortgies) Voss accepted as Dahlia coccinea Cav. (original description)
Dahlia pinnata var. variabilis (Willd.) Voss accepted as Dahlia pinnata Cav. (original description)
Eupatorium glabellum Hort. (original description)
Eupatorium ligustrinum f. weinmannianum (Regel & Körn.) Voss accepted as Ageratina ligustrina (DC.) R.M.King & H.Rob. (original description)
Eupatorium odoratissimum Hort. (original description)
Eupatorium purpureum f. amoenum (Pursh) Voss accepted as Eutrochium purpureum var. purpureum (original description)
Eupatorium purpureum f. dubium (Willd. ex Poir.) Voss accepted as Eupatorium dubium Willd. ex Poiret (original description)
Eupatorium purpureum f. falcatum (Michx.) Voss accepted as Eutrochium purpureum var. purpureum (original description)
Eupatorium purpureum f. ternifolium (Elliott) Voss accepted as Eupatorium dubium Sessé & Moc. (original description)
Eupatorium purpureum f. trifoliatum (L.) Voss accepted as Eupatorium quaternum DC. (original description)
Eupatorium purpureum var. angustifolium Voss (original description)
Eupatorium purpureum var. maculatum (L.) Voss accepted as Eupatorium maculatum L. (original description)
Felicia amelloides (L.) Voss (original description)
Felicia microphylla (Cass.) Voss accepted as Felicia aethiopica subsp. aethiopica (Burm.f.) Bolus & Wolley-Dod ex Adamson & T.M.Salt (original description)
Gaillardia pulchella f. lorenziana Voss accepted as Gaillardia pulchella Foug. (original description)
Gaillardia pulchella f. picta (D.Don) Voss accepted as Gaillardia pulchella Foug. (original description)
Gaillardia pulchella var. simplex Voss accepted as Gaillardia pulchella Foug. (original description)
Gaillardia pulchella var. tubulosa Voss accepted as Gaillardia pulchella Foug. (original description)
Helenium autumnale var. grandiflorum (Nutt.) Voss (original description)
Helenium autumnale var. longifolium (Sm.) Voss (original description)
Helenium autumnale var. pubescens (Aiton) Voss (original description)
Helenium autumnale var. pumilum (Willd.) Voss (original description)
Helenium autumnale var. tubuliflorum (DC.) Voss (original description)
Helianthus debilis f. cucumerifolius (Torr. & A.Gray) Voss accepted as Helianthus debilis subsp. cucumerifolius (Torr. & A.Gray) Heiser (original description)
Helichrysum capitatum Hort. (original description)
Helichrysum compositum Hort. (original description)
Helichrysum monstruosum Hort. (original description)
Lacinaria spicata f. resinosa (Nutt.) Voss accepted as Liatris spicata var. resinosa (Nutt.) Gaiser (original description)
Matricaria alba Hort. (original description)
Matricaria eximia Hort. (original description)
Matricaria tchihatchewii (Boiss.) Voss accepted as Tripleurospermum caucasicum (Willd.) Hayek (original description)
Mikania scandens f. pubescens (Muhl.) Voss (original description)
Podolepis angustifolia Hort. (original description)
Pyrethrum eximium Hort. (original description)
Rhaponticum rhaponticum (L.) Voss (original description)
Roccardia albicans (A.Cunn.) Voss (original description)
Roccardia anthemoides (DC.) Voss (original description)
Roccardia chlorocephala (Benth.) Voss (original description)
Roccardia corymbiflora (Schltdl.) Voss accepted as Rhodanthe corymbiflora (Schltdl.) Paul G.Wilson (original description)
Roccardia cotula (DC.) Voss (original description)
Roccardia floribunda (DC.) Voss (original description)
Roccardia humboldtiana (DC.) Voss (original description)
Roccardia manglesii (F.Muell.) Voss (original description)
Roccardia rubella (Benth.) Voss (original description)
Senecio citrinus (DC.) Voss (original description)
Silphium perfoliatum f. hornemannii (Schrad. ex DC.) Voss (original description)
Solidago bicolor f. lanata (Hook.) Voss (original description)
Solidago canadensis f. procera (Aiton) Voss (original description)
Solidago sempervirens f. viminea (Aiton) Voss (original description)
Sphenogyne calendulacea Hort. (original description)
Thelesperma hybridum Voss (original description)
Uhdea pyramidalis Hort. (original description)
Venidium micranthum (Thunb.) Voss (original description)
Venidium multiflorum Hort. ex Vilmorin (original description)