Dutch Elm Disease | Cycle | Elm | Taxonomy The subgenera of the genus Ulmus Index document U. americana

    The species of the genus Ulmus

    The approximately 45 woody species of the genus Ulmus are summarized in Table 1. The (native) habitat and the level of resistance to Dutch elm disease (DED) is given for each species. The majority of Ulmus species are diploid, whereas U. americana is tetraploid. A number of species have been renamed over time. Taxonomists have disagreed on several occasions whether to recognize a species as a distinct species or as a variety of another species. Nowadays, DNA technology is used to analyze taxonomic relations within one elm species {[757]}. In Table 1 an attempt is made to present the recent nomenclature of the different elm species. A number of synonyms and names used in former days is included in the list.

    Table 1:  The species of the genus Ulmus ( See references: [20], [252], [259], [260], [263], [268], [269], [278], [279], [280], [281], [307], [374], [590], [599] ,[709], [710], [758], [795], [849]}

    Species1

    Section2

    Synonym /former name3

    Distribution

    DEDR

    U. alata Michx.

    Chaetoptelea (Liebm.)
    C.K.Schneid.

    -

    US (S)

    -

    U. americana L.

    Blepharocar-pus Dumort.

    -

    US (C+E)

    -

    U. androssowii Litw. var. Subhirsuta (C.K.Schneid.) P.H.Huang

    n.d.

    U. androssowii var. virgata, U. chumlia Melv. & Heybr., U. pumila var. pilosa Rehd., U. virgata Wall. ex Planch., U. wilsoniana C.K.Schneid. var.subhirsuta Schneid.

    Asia (China)

    n.d.

    U.bergmanniana C.K.Schneid.

    Ulmus

    U. lasiophylla (C.K.Schneid) Cheng

    Asia
    (C China)

    n.d.

    U. canescens Melville

    Ulmus

    see U. minor

    Europe

    -

    U. castaneifolia Hemsl.

    n.d.

    U. multinervis Cheng,
    U. ferruginea
    Cheng

    Asia
    (C China)

    n.d.

    U. celtidea (Rogow.) Litw.

    Blepharocar-pus Dumort.

            

    Europe
    (C+E)

    -

    U. changii Cheng

    Ulmus

    U. kunmingensis Cheng

    Asia
    (E China)

    n.d.

    U. crassifolia Nutt.

    Trichoptelea
    C.K.Schneid.

    U. monterreyensis C.H.Müell.

    US (S), Mexico

    +

    U. davidiana Planch

    Ulmus

                 

    Asia (China, Japan, Korea, former USSR)

    +

    U. densa Litw.

    n.d.

                    

    Asia (former USSR))

    -

    U. divarcata  C.H. Müell.

    n.d.

     

    Mexico

    n.d.

    U. elliptica K. Koch

    Ulmus

    Europe
    (Caucasus)

    -

    U. elongata
    L.K. Fu & C.S. Ding

    Chaetoptelea

     

    Asia
    (S+E China)

    n.d.

    U. gaussenii
    Cheng

    Ulmus

     

    Asia (China)

    n.d.

    U. glabra Huds.

    Ulmus

    U. montana Withering

    U. scabra Mill.

    U. campestris L.

    Europe
    Asia

    -

    U. glaucescens Franch.

    Ulmus

     

    Asia (China)

    +

    U. harbinensis S.Q. Nie & K.Q. Huang

    n.d.

     

    Asia (China)

    n.d.

    U. ismaelis Todzia&Panero

    4

    Mexico

    n.d.

    U. japonica Sarg.

    Ulmus

    Asia (N+E)

    +

    U. laciniata (Trautv.) Mayr

    Ulmus

    U. montana With. var. lacianata, U. major Hoben. var. heterophylla Maxim.

    Asia (China, Korea, former USSR)

    +

    U. laevis Pall.

    Blepharocar-pus Dumort.

    U. pedunculata Foug.
    U. effusa Willd.

    Europe (C+E)

    -

    U. lamellosa T. Wang & S.L. Chang

    n.d.

     

    Asia
    (N+E China)

    n.d.

    U. lanceaefolia Roxb. & Wall.

    n.d.

    U.lancifolia Roxb.

    Asia (S+E)
    Himalayas

    +

    U. macrocarpa Hance

    Ulmus

    U. macrophylla Nakai

    Asia (China)

    +

    U. mexicana (Liebm.) Planch.

    Chaetoptelea
    (Liebm.)
    C.K.Schneid.

    Chaeoptelea mexicana Liebm.

    Mexico

    n.d.

    U. microcarpa L.K. Fu

    n.d.

     

    Asia
    (S China)

    n.d.

    U. minor Mill.5

    Ulmus

    U. canescens Melv.
    U. carpinifolia Gled.
    U. glabra Mill.
    U. nitens Moench.

    Europe

    +

    U. parvifolia Jacq.

    Microptelea
    (Spach) Benth. & Hook.

    Microptelea parvifolia (Jacq.) Spach, Planera parvifolia (Jacq.) Sweet, U. campestris L. var. chinensis Loudon, U. chinensis Pers., U. coreana Nakai, U. japonica Sieb., U. sieboldii Daveau, U. sieboldii f. shirasawana (Daveau) Nakai, U. shirasawana Daveau

    Asia (E)
    N China, Japan

    ++

    U. prunifolia Cheng & L.K.Fu

    n.d.

     

    Asia
    (S China)

    n.d.

    U. pumila L.

    Ulmus

    U. pinnato-ramosa Dieck
    U. manshurica Nakai, U. campestris Linn. var. pumila (Linn.) Maxim.
    U. turkesticana Requien

    Asia (China, Korea, Mongolia, former USSR),
    Canada

    ++6

    U. rubra
    Muhl.

    Ulmus

    U. crispa Willd., U. fulva Michx., U. pendula Willd., U. pubescens Walter

    US (C+E)
    + Canada

    -

    U. serotina Sarg.

    Trichoptelea
    C.K.Schneid.

    U. divaricata C.H.Müll.,
    U. multinervosa  C.H.Müll.

    US (S)

    -

    U. sukaczevii Andr.

    Ulmus

    see U. glabra

    Russia

    n.d.

    U. szechuanica Fang

    Ulmus

    U. erythrocarpa Cheng

    Asia (China)

    n.d.

    U. taihangshanensis C. Wang

    n.d.

     

    Asia (China)

    n.d.

    U.thomasii Sarg.

    Trichoptelea
    C.K.Schneid.

    U. racemosa D.Thomas

    US (C+E) + Canada

    -

    U. tonkinensis Gagnep.

    n.d.

     

    Asia (China)

    n.d.

    U. turkestania Regel

    n.d.

     

    Asia

    -

    U. uyematsui Hayata

    Ulmus

    Asia (Taiwan)

    n.d.

    U. villosa Brandis

    n.d.

    U. laevigata Royle

    Asia (Himalayas)

    +

    U. wallichiana Planch.

    Ulmus

     

    Asia (Himalayas)

    +

    U. wilsoniana C.K. Schneid.

    Ulmus

     

    Asia
    (C China)

    ++

    1. A number of species have been renamed over time. Taxonomists have disagreed on several occasions whether to recognize a species as a distinct species or as a variety of another species. In the table an attempt is made to present the recent nomenclature of the different elm species. In addition to synonyms and former names, the section, habitat, and relative resistance to Dutch elm disease is given for each species.
    2. According to Wiegrefe et al. {[277],[591]} and S. Wiegrefe, personal communication.
    3. In this column,an incomplete summary is given of synonyms/former names used for different elm species.
    4. Assignment to the section Trichoptelea is tentative, according to Todzia and Panero {[599]}.
    5. Including U. minor Mill. var. vulgaris, formerly known as U. procera {[269]}
    6. However, some forms of U. pumila from far eastern USSR are highly susceptible to Ophiostoma ulmi infection {[305]}.

     

    -                 no/little resistance

    +               some resistance

    ++             much resistance

    n.d.            not determined

The subgenera of the genus Ulmus The subgenera of the genus Ulmus U. americana U. americana