| argentina | catamarca province | alnus acuminata | species | 0 | 2 |
| argentina | jujuy province | alnus acuminata | species | 0 | 1 |
| argentina | tucuman province | alnus acuminata | species | 0 | 2 |
| austria | | alnus alnobetula | species | 2 | 0 |
| canada | | alnus rubra | species | 4 | 0 |
| canada | british columbia | alnus alnobetula | species | 5 | 0 |
| canada | british columbia | alnus incana | species | 3 | 0 |
| canada | british columbia | alnus rubra | species | 6 | 0 |
| canada | manitoba | alnus alnobetula | species | 2 | 0 |
| canada | newfoundland and labrador | alnus alnobetula | species | 4 | 0 |
| canada | northwest territories | alnus alnobetula subsp. crispa | subspecies | 4 | 0 |
| canada | nova scotia | alnus incana | species | 2 | 0 |
| canada | nova scotia | alnus serrulata | species | 2 | 0 |
| canada | nunavut | alnus alnobetula subsp. crispa | subspecies | 2 | 0 |
| canada | ontario | alnus alnobetula | species | 3 | 0 |
| canada | ontario | alnus glutinosa | species | 8 | 0 |
| canada | quebec | alnus incana subsp. rugosa | subspecies | 1 | 0 |
| china | | alnus alnobetula | species | 1 | 0 |
| china | | alnus cremastogyne | species | 5 | 0 |
| china | | alnus ferdinandi-coburgii | species | 3 | 0 |
| china | | alnus formosana | species | 8 | 0 |
| china | | alnus glutinosa | species | 5 | 0 |
| china | | alnus hirsuta | species | 1 | 0 |
| china | | alnus japonica | species | 1 | 0 |
| china | | alnus nepalensis | species | 3 | 0 |
| china | | alnus trabeculosa | species | 3 | 0 |
| china | chongqing | alnus cremastogyne | species | 1 | 0 |
| china | guangxi | alnus nepalensis | species | 1 | 0 |
| china | guizhou | alnus ferdinandi-coburgii | species | 1 | 0 |
| china | guizhou | alnus nepalensis | species | 1 | 0 |
| china | henan | alnus trabeculosa | species | 1 | 0 |
| china | hunan | alnus trabeculosa | species | 2 | 0 |
| china | jilin | alnus hirsuta | species | 3 | 0 |
| china | shandong | alnus japonica | species | 1 | 0 |
| china | sichuan | alnus cremastogyne | species | 2 | 0 |
| china | sichuan | alnus ferdinandi-coburgii | species | 3 | 0 |
| china | sichuan | alnus formosana | species | 3 | 0 |
| china | yunnan | alnus cremastogyne | species | 1 | 0 |
| china | yunnan | alnus nepalensis | species | 7 | 2 |
| china | zhejiang | alnus cremastogyne | species | 1 | 0 |
| cyprus | | alnus orientalis | species | 4 | 0 |
| finland | | alnus glutinosa | species | 1 | 0 |
| finland | | alnus incana | species | 4 | 0 |
| france | | alnus alnobetula subsp. alnobetula | subspecies | 1 | 0 |
| france | | alnus cordata | species | 7 | 0 |
| france | | alnus glutinosa | species | 4 | 0 |
| france | | alnus incana | species | 1 | 0 |
| france | corse region | alnus cordata | species | 5 | 0 |
| france | pays de la loire region | alnus alnobetula subsp. suaveolens | subspecies | 5 | 0 |
| france | rhone-alpes region | alnus glutinosa | species | 4 | 0 |
| georgia | | alnus glutinosa subsp. barbata | subspecies | 50 | 0 |
| germany | | alnus glutinosa | species | 1 | 0 |
| germany | | alnus incana | species | 2 | 0 |
| germany | | alnus incana subsp. incana | subspecies | 1 | 0 |
| india | | alnus glutinosa | species | 3 | 0 |
| india | | alnus incana | species | 1 | 0 |
| india | | alnus nepalensis | species | 1 | 0 |
| india | | alnus nitida | species | 2 | 0 |
| ireland | | alnus glutinosa | species | 2 | 0 |
| italy | umbria region | alnus glutinosa | species | 3 | 0 |
| japan | | alnus firma | species | 10 | 0 |
| japan | | alnus formosana | species | 1 | 0 |
| japan | | alnus hirsuta | species | 5 | 0 |
| japan | | alnus japonica | species | 9 | 0 |
| japan | | alnus matsumurae | species | 5 | 0 |
| japan | | alnus pendula | species | 4 | 0 |
| japan | | alnus serrulatoides | species | 6 | 0 |
| japan | | alnus sieboldiana | species | 1 | 0 |
| japan | | alnus trabeculosa | species | 1 | 0 |
| japan | aichi prefecture | alnus firma | species | 10 | 0 |
| japan | aichi prefecture | alnus japonica | species | 16 | 0 |
| japan | aichi prefecture | alnus sieboldiana | species | 2 | 0 |
| japan | aichi prefecture | alnus trabeculosa | species | 39 | 0 |
| japan | aomori prefecture | alnus hirsuta | species | 1 | 0 |
| japan | aomori prefecture | alnus maximowiczii | species | 1 | 0 |
| japan | ehime prefecture | alnus firma | species | 3 | 0 |
| japan | ehime prefecture | alnus sieboldiana | species | 1 | 0 |
| japan | fukuoka prefecture | alnus hirsuta | species | 1 | 0 |
| japan | fukushima prefecture | alnus hirsuta | species | 1 | 0 |
| japan | fukushima prefecture | alnus matsumurae | species | 2 | 0 |
| japan | fukushima prefecture | alnus pendula | species | 1 | 0 |
| japan | gifu prefecture | alnus hirsuta | species | 4 | 0 |
| japan | gifu prefecture | alnus hirsuta var. sibirica | varietas | 1 | 0 |
| japan | gifu prefecture | alnus serrulatoides | species | 4 | 0 |
| japan | gifu prefecture | alnus trabeculosa | species | 10 | 0 |
| japan | gunma prefecture | alnus hirsuta | species | 1 | 0 |
| japan | gunma prefecture | alnus matsumurae | species | 1 | 0 |
| japan | hiroshima prefecture | alnus hirsuta var. sibirica | varietas | 2 | 0 |
| japan | hokkaido prefecture | alnus hirsuta | species | 4 | 0 |
| japan | hokkaido prefecture | alnus japonica | species | 2 | 0 |
| japan | hokkaido prefecture | alnus maximowiczii | species | 4 | 0 |
| japan | ibaraki prefecture | alnus hirsuta | species | 4 | 0 |
| japan | ibaraki prefecture | alnus japonica | species | 28 | 0 |
| japan | ibaraki prefecture | alnus trabeculosa | species | 1 | 1 |
| japan | iwate prefecture | alnus fauriei | species | 2 | 0 |
| japan | iwate prefecture | alnus hirsuta | species | 3 | 0 |
| japan | iwate prefecture | alnus pendula | species | 2 | 0 |
| japan | iwate prefecture | alnus trabeculosa | species | 0 | 1 |
| japan | kagoshima prefecture | alnus firma | species | 1 | 0 |
| japan | kagoshima prefecture | alnus sieboldiana | species | 1 | 0 |
| japan | kochi prefecture | alnus hirsuta | species | 1 | 0 |
| japan | kochi prefecture | alnus pendula | species | 1 | 0 |
| japan | kochi prefecture | alnus sieboldiana | species | 2 | 0 |
| japan | kumamoto prefecture | alnus hirsuta | species | 1 | 0 |
| japan | mie prefecture | alnus hirsuta | species | 1 | 0 |
| japan | mie prefecture | alnus sieboldiana | species | 2 | 0 |
| japan | mie prefecture | alnus trabeculosa | species | 1 | 0 |
| japan | miyazaki prefecture | alnus hirsuta | species | 2 | 0 |
| japan | nagano prefecture | alnus hirsuta | species | 2 | 0 |
| japan | nagano prefecture | alnus matsumurae | species | 4 | 0 |
| japan | nagano prefecture | alnus maximowiczii | species | 2 | 0 |
| japan | niigata prefecture | alnus hirsuta | species | 1 | 0 |
| japan | niigata prefecture | alnus hirsuta var. sibirica | varietas | 1 | 0 |
| japan | niigata prefecture | alnus pendula | species | 1 | 0 |
| japan | niigata prefecture | alnus sieboldiana | species | 2 | 0 |
| japan | okayama prefecture | alnus pendula | species | 1 | 0 |
| japan | okayama prefecture | alnus trabeculosa | species | 2 | 0 |
| japan | okinawa prefecture | alnus formosana | species | 1 | 0 |
| japan | okinawa prefecture | alnus japonica | species | 2 | 0 |
| japan | shiga prefecture | alnus japonica | species | 4 | 0 |
| japan | shiga prefecture | alnus pendula | species | 2 | 0 |
| japan | shiga prefecture | alnus sieboldiana | species | 2 | 0 |
| japan | shizuoka prefecture | alnus hirsuta | species | 1 | 0 |
| japan | shizuoka prefecture | alnus sieboldiana | species | 7 | 0 |
| japan | shizuoka prefecture | alnus trabeculosa | species | 1 | 0 |
| japan | tochigi prefecture | alnus matsumurae | species | 1 | 0 |
| japan | tochigi prefecture | alnus trabeculosa | species | 0 | 1 |
| japan | tokyo prefecture | alnus hirsuta | species | 1 | 0 |
| japan | tokyo prefecture | alnus sieboldiana | species | 2 | 0 |
| japan | toyama prefecture | alnus hirsuta | species | 1 | 0 |
| japan | toyama prefecture | alnus pendula | species | 1 | 0 |
| japan | wakayama prefecture | alnus pendula | species | 2 | 0 |
| japan | yamagata prefecture | alnus fauriei | species | 1 | 0 |
| japan | yamagata prefecture | alnus hirsuta var. sibirica | varietas | 1 | 0 |
| japan | yamagata prefecture | alnus pendula | species | 1 | 0 |
| mexico | | alnus acuminata | species | 1 | 0 |
| mexico | | alnus acuminata subsp. arguta | subspecies | 4 | 0 |
| mexico | oaxaca | alnus acuminata | species | 1 | 0 |
| mexico | veracruz-llave | alnus jorullensis subsp. jorullensis | subspecies | 2 | 0 |
| netherlands | | alnus glutinosa | species | 6 | 0 |
| netherlands | groningen province | alnus glutinosa | species | 3 | 0 |
| netherlands | overijssel province | alnus glutinosa | species | 33 | 0 |
| peru | | alnus acuminata | species | 1 | 0 |
| portugal | | alnus incana | species | 2 | 0 |
| russia | | alnus maximowiczii | species | 3 | 0 |
| russia | krasnoyarsk krai | alnus alnobetula subsp. alnobetula | subspecies | 4 | 0 |
| russia | sakha republic | alnus alnobetula subsp. fruticosa | subspecies | 1 | 0 |
| south korea | | alnus hirsuta | species | 8 | 0 |
| spain | | alnus glutinosa | species | 1 | 0 |
| switzerland | | alnus alnobetula | species | 3 | 0 |
| switzerland | | alnus incana | species | 1 | 0 |
| switzerland | geneva region | alnus incana | species | 2 | 0 |
| turkey | giresun province | alnus glutinosa subsp. glutinosa | subspecies | 7 | 0 |
| united kingdom | | alnus cordata | species | 1 | 0 |
| united kingdom | | alnus fauriei | species | 2 | 0 |
| united kingdom | | alnus glutinosa | species | 5 | 0 |
| united kingdom | | alnus henryi | species | 1 | 0 |
| united kingdom | | alnus incana | species | 1 | 0 |
| united kingdom | | alnus nitida | species | 1 | 0 |
| united kingdom | | alnus orientalis | species | 1 | 0 |
| united kingdom | | alnus sieboldiana | species | 1 | 0 |
| united kingdom | | alnus subcordata | species | 1 | 0 |
| united kingdom | england | alnus cordata | species | 1 | 0 |
| united kingdom | england | alnus fauriei | species | 675 | 0 |
| united kingdom | england | alnus glutinosa | species | 1 | 0 |
| united kingdom | england | alnus glutinosa subsp. glutinosa | subspecies | 2 | 0 |
| united kingdom | england | alnus nitida | species | 4 | 0 |
| united kingdom | england | alnus orientalis | species | 3 | 0 |
| united kingdom | england | alnus rubra | species | 2 | 0 |
| united kingdom | england | alnus subcordata | species | 4 | 0 |
| united kingdom | scotland | alnus alnobetula | species | 1 | 0 |
| united states | | alnus alnobetula subsp. sinuata | subspecies | 2 | 0 |
| united states | | alnus hirsuta | species | 1 | 0 |
| united states | | alnus incana subsp. tenuifolia | subspecies | 1 | 0 |
| united states | | alnus maritima | species | 2 | 0 |
| united states | | alnus rubra | species | 1 | 0 |
| united states | | alnus serrulata | species | 5 | 0 |
| united states | | alnus x mayrii | species | 2 | 0 |
| united states | alaska | alnus alnobetula | species | 2 | 0 |
| united states | colorado | alnus incana subsp. tenuifolia | subspecies | 1 | 0 |
| united states | district of columbia | alnus incana subsp. rugosa | subspecies | 3 | 0 |
| united states | maryland | alnus hirsuta var. sibirica | varietas | 4 | 0 |
| united states | maryland | alnus maritima subsp. maritima | subspecies | 4 | 0 |
| united states | massachusetts | alnus incana subsp. rugosa | subspecies | 4 | 0 |
| united states | massachusetts | alnus japonica | species | 1 | 0 |
| united states | massachusetts | alnus maritima | species | 3 | 0 |
| united states | massachusetts | alnus x mayrii | species | 1 | 0 |
| united states | oklahoma | alnus maritima subsp. oklahomensis | subspecies | 3 | 0 |
| united states | oregon | alnus rubra | species | 1 | 0 |
| united states | washington | alnus rubra | species | 3 | 0 |
| united states | wisconsin | alnus incana | species | 3 | 0 |