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Year (from/to)
Paleoregion
Africa
Africa (East)
Africa (Equatorial)
Africa (North)
Africa (South)
Africa (West)
Altaida (Altaides)
Altaj
America
America (Caribbean)
America (North)
America (North - Greenland)
America (South)
Anatolia
Angarida
Angarida (Mongolia)
Antarctica
Arctic
Australia
Australia (New Zealand)
Avalonia
Baltica
Cathaysia
Cathaysia (Kitakamiland)
Cathaysia (North)
Cathaysia (Sino-Korea)
Cathaysia (South)
Caucasus
China (North)
China (South)
Chingiz
Columbia (Amazonia)
Columbia (Australia)
Columbia (Baltica)
Columbia (East Antarctica)
Columbia (Greenland)
Columbia (Indostan)
Columbia (Kalahari)
Columbia (Laurentia)
Columbia (North Australia)
Columbia (North China)
Columbia (South Australia)
Columbia (South China)
Columbia (West Africa)
Columbia (West Australia)
Congo-São Francisco (Congo)
Eurasia
Eurasia (Anatolia)
Eurasia (Arabian peninsula)
Eurasia (Asia)
Eurasia (Asia Minor)
Eurasia (Caucasus)
Eurasia (Central Asia)
Eurasia (Central Asia and Caucasus)
Eurasia (Central Asia and Urals)
Eurasia (China)
Eurasia (Europe)
Eurasia (Europe & Urals)
Eurasia (Europe and Central Asia)
Eurasia (Europe and W Siberia)
Eurasia (Far East)
Eurasia (Far East & Central Asia)
Eurasia (Far East & China)
Eurasia (Far East and Japanese Archipelago)
Eurasia (Greenland)
Eurasia (Himalayas)
Eurasia (Indochina)
Eurasia (Indostan)
Eurasia (Japanese Archipelago)
Eurasia (Japanese Archipelago and Sakhalin)
Eurasia (Java Island)
Eurasia (Maritime Southeast Asia)
Eurasia (Mesopotamian Plain)
Eurasia (Middle East)
Eurasia (Novaja Zemlja Archipelago)
Eurasia (S Asia)
Eurasia (S Urals)
Eurasia (SE Asia)
Eurasia (Siberia)
Eurasia (Siberia and Central Asia)
Eurasia (Siberia and Far East)
Eurasia (South China)
Eurasia (South East)
Eurasia (Tarim Basin)
Eurasia (Tibet)
Eurasia (Urals)
Eurasia (W Asia)
Eurasia (W Asia & Caucasus)
Eurasia (W Siberia)
Eurasia (W Siberia & Central Asia)
Europe
Europe (Cis-Caspian)
Gondwana (Africa)
Gondwana (Antarctica)
Gondwana (Arabia)
Gondwana (Armorica)
Gondwana (Australia)
Gondwana (Indostan)
Gondwana (N Africa)
Gondwana (N Africa [Tethys palaeocean])
Gondwana (New Caledonia)
Gondwana (New Zealand)
Gondwana (Perunica)
Gondwana (S America)
Gondwana (Sardinia)
Gondwana (Saxo-Thuringia)
Gondwana (South Africa)
Gondwana (South America)
Kazakhstania
Kazakhstania (Xinjiang)
Kenorland (Baltica)
Kenorland (Kalaharia)
Kenorland (Laurentia)
Kenorland (Western Australia)
Kitakamiland
Laurentia
Laurussia
Laurussia (Anatolia)
Laurussia (Armorica)
Laurussia (Avalonia)
Laurussia (Avalonia & Baltica)
Laurussia (Baltica)
Laurussia (Cantabria)
Laurussia (Iberica)
Laurussia (Laurentia)
Laurussia (Moesia)
Laurussia (Moldanubia)
Laurussia (Perunica)
Laurussia (Rhenano-Hercynia)
Laurussia (Saxo-Thuringia)
Moldanubia
Mongolia (Western)
not specified
Pacific
Pamir-Alaj
Pannotia (Antarctica)
Pannotia (Indostan)
Pannotia (Siberia)
Perunica
Proangarida
Rodinia
Rodinia (Amazonia)
Rodinia (Australia)
Rodinia (Baltica)
Rodinia (Indostan)
Rodinia (Laurentia)
Rodinia (North China)
Rodinia (Rio Plato)
Rodinia (Siberia)
Rodinia (South China)
Siberia
Sibumasu
Superior Craton (Superior Craton)
Tibet
Tien Shan
Tien Shan (North)
Tien Shan (South)
Tuva
unknown
Vaalbara (Kaapvaal)
Vaalbara (Pilbara)
Xinjiang
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Name (desc.)
Year
Total: 712
species
valid
Populus microtremuloides
Knowlt.
Proc. U.S. Natl. Mus., 51(2151):
261.
24 Nov 1916
species
valid
Populus neomexicana
Knowlt.
Profess. Pap. U.S. Geol. Surv., 1917, 101:
258.
May 1918
species
valid
Populus obovata
Knowlt.
Bull. U.S. Geol. Surv., (163):
34.
Apr 1900
species
valid
Populus occidentalis
Knowlt.
Rep. (Annual) U.S. Geol. Surv., 18, (3):
727.
Nov 1898
species
valid
Populus problematica
Knowlt.
Bull. U.S. Geol. Surv., 1893, (105):
51.
Jun 1894
species
valid
Populus vivaria
Knowlt.
Monogr. U.S. Geol. Surv., 32(2):
696.
Oct 1899
species
valid
Populus wardii
Knowlt.
Bull. U.S. Geol. Surv., (163):
36.
Apr 1900
species
valid
Populus washingtonensis
Knowlt.
Profess. Pap. U.S. Geol. Surv., 140(A):
31.
19 Feb 1926
species
valid
Populus xantholithensis
Knowlt.
Monogr. U.S. Geol. Surv., 32(2):
695.
Oct 1899
species
valid
Populus zeiIleri
(Lesq.)
Knowlt.
Profess. Pap. U.S. Geol. Surv., (155):
54.
19 Jun 1930
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