| algeria | | pythium ultimum | species | 3 | 0 |
| algeria | | pythium ultimum var. ultimum | varietas | 11 | 0 |
| australia | | pythium ultimum | species | 1 | 0 |
| australia | queensland | pythium ultimum | species | 1 | 0 |
| brazil | | pythium ultimum var. sporangiiferum | varietas | 2 | 0 |
| canada | | pythium ultimum | species | 10 | 0 |
| canada | alberta | pythium ultimum var. ultimum | varietas | 34 | 0 |
| canada | british columbia | pythium ultimum | species | 4 | 0 |
| canada | british columbia | pythium ultimum var. ultimum | varietas | 11 | 0 |
| canada | ontario | pythium ultimum var. sporangiiferum | varietas | 15 | 0 |
| canada | ontario | pythium ultimum var. ultimum | varietas | 17 | 0 |
| china | | pythium ultimum | species | 3 | 0 |
| china | | pythium ultimum var. ultimum | varietas | 4 | 0 |
| china | hubei | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| china | hubei | pythium ultimum var. ultimum | varietas | 1 | 0 |
| djibouti | | pythium ultimum var. sporangiiferum | varietas | 4 | 0 |
| egypt | | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| egypt | | pythium ultimum var. ultimum | varietas | 1 | 0 |
| france | | pythium ultimum | species | 3 | 0 |
| france | | pythium ultimum var. sporangiiferum | varietas | 11 | 0 |
| germany | | pythium ultimum | species | 1 | 0 |
| india | | pythium ultimum | species | 3 | 0 |
| india | | pythium ultimum var. ultimum | varietas | 11 | 0 |
| india | himachal pradesh | pythium ultimum | species | 2 | 0 |
| india | sikkim | pythium ultimum | species | 0 | 1 |
| iran | tehran province | pythium ultimum | species | 0 | 1 |
| italy | | pythium ultimum | species | 1 | 0 |
| italy | calabria region | pythium ultimum | species | 0 | 1 |
| italy | marche region | pythium ultimum | species | 4 | 0 |
| italy | sardinia autonomous region | pythium ultimum | species | 0 | 1 |
| japan | hokkaido prefecture | pythium ultimum | species | 1 | 0 |
| japan | ibaraki prefecture | pythium ultimum var. ultimum | varietas | 1 | 0 |
| japan | kochi prefecture | pythium ultimum var. ultimum | varietas | 1 | 0 |
| japan | nagano prefecture | pythium ultimum | species | 16 | 0 |
| japan | nagano prefecture | pythium ultimum var. ultimum | varietas | 1 | 0 |
| lebanon | beirut governorate | pythium ultimum var. sporangiiferum | varietas | 12 | 0 |
| netherlands | | pythium ultimum | species | 4 | 0 |
| netherlands | | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| netherlands | | pythium ultimum var. ultimum | varietas | 13 | 0 |
| new zealand | | pythium ultimum | species | 1 | 0 |
| pakistan | | pythium ultimum | species | 1 | 0 |
| poland | | pythium ultimum | species | 3 | 0 |
| poland | | pythium ultimum var. ultimum | varietas | 1 | 0 |
| south africa | | pythium ultimum | species | 6 | 0 |
| south africa | | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| south africa | the western cape province | pythium ultimum var. sporangiiferum | varietas | 11 | 0 |
| south africa | the western cape province | pythium ultimum var. ultimum | varietas | 11 | 0 |
| south korea | | pythium ultimum | species | 1 | 0 |
| spain | | pythium ultimum | species | 1 | 0 |
| spain | | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| spain | balearic islands | pythium ultimum var. sporangiiferum | varietas | 11 | 0 |
| svalbard and jan mayen | | pythium ultimum var. ultimum | varietas | 1 | 0 |
| thailand | | pythium ultimum | species | 1 | 0 |
| tunisia | | pythium ultimum | species | 3 | 0 |
| tunisia | monastir governorate | pythium ultimum | species | 0 | 1 |
| united kingdom | | pythium ultimum | species | 1 | 0 |
| united kingdom | | pythium ultimum var. ultimum | varietas | 26 | 0 |
| united kingdom | scotland | pythium ultimum | species | 0 | 1 |
| united states | | pythium ultimum | species | 2 | 0 |
| united states | | pythium ultimum var. sporangiiferum | varietas | 3 | 0 |
| united states | | pythium ultimum var. sporangiiferum br650 | no rank | 5483 | 0 |
| united states | | pythium ultimum var. ultimum | varietas | 15 | 0 |
| united states | arizona | pythium ultimum | species | 2 | 0 |
| united states | arkansas | pythium ultimum | species | 3 | 0 |
| united states | california | pythium ultimum | species | 15 | 0 |
| united states | california | pythium ultimum var. ultimum | varietas | 12 | 0 |
| united states | colorado | pythium ultimum var. ultimum | varietas | 11 | 0 |
| united states | florida | pythium ultimum | species | 2 | 0 |
| united states | florida | pythium ultimum var. sporangiiferum | varietas | 11 | 0 |
| united states | hawaii | pythium ultimum | species | 1 | 0 |
| united states | illinois | pythium ultimum | species | 19 | 0 |
| united states | illinois | pythium ultimum var. sporangiiferum | varietas | 2 | 0 |
| united states | illinois | pythium ultimum var. ultimum | varietas | 14 | 0 |
| united states | indiana | pythium ultimum var. sporangiiferum | varietas | 4 | 0 |
| united states | indiana | pythium ultimum var. ultimum | varietas | 2 | 0 |
| united states | iowa | pythium ultimum | species | 2 | 0 |
| united states | iowa | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| united states | iowa | pythium ultimum var. ultimum | varietas | 4 | 0 |
| united states | kansas | pythium ultimum | species | 5 | 0 |
| united states | kansas | pythium ultimum var. sporangiiferum | varietas | 48 | 0 |
| united states | kansas | pythium ultimum var. ultimum | varietas | 24 | 0 |
| united states | maryland | pythium ultimum var. sporangiiferum | varietas | 11 | 0 |
| united states | michigan | pythium ultimum | species | 26 | 0 |
| united states | michigan | pythium ultimum var. sporangiiferum | varietas | 1 | 0 |
| united states | michigan | pythium ultimum var. ultimum | varietas | 7 | 0 |
| united states | minnesota | pythium ultimum | species | 16 | 0 |
| united states | minnesota | pythium ultimum var. ultimum | varietas | 58 | 0 |
| united states | nebraska | pythium ultimum var. ultimum | varietas | 2 | 0 |
| united states | new york | pythium ultimum | species | 1 | 0 |
| united states | north dakota | pythium ultimum | species | 4 | 0 |
| united states | north dakota | pythium ultimum var. ultimum | varietas | 40 | 0 |
| united states | pennsylvania | pythium ultimum var. sporangiiferum | varietas | 4 | 0 |
| united states | south dakota | pythium ultimum | species | 3 | 0 |
| united states | south dakota | pythium ultimum var. ultimum | varietas | 11 | 0 |
| united states | washington | pythium ultimum | species | 3 | 0 |
| united states | washington | pythium ultimum var. ultimum | varietas | 35 | 0 |
| united states | wisconsin | pythium ultimum | species | 15 | 0 |
| united states | wisconsin | pythium ultimum var. ultimum | varietas | 8 | 0 |
| uruguay | | pythium ultimum | species | 1 | 0 |