Reference: Brummitt, R.K. (2001) TDGW - World Geographical Scheme for Recording Plant Distributions, 2nd Edition
Africa
West Tropical Africa
Benin, Burkina, Gambia, Ghana, Guinea-Bissau, Guinea, Ivory Coast, Liberia, Mali, Mauritania, Nigeria, Niger, Senegal, Sierre Leone, Togo.
West-Central Tropical Africa
Burundi, Central African Republic, Cameroon, Congo, Equatorial Guinea, Gabon, Gulf of Guinea Islands, Rwanda, Zaïre.
Northeast Tropical Africa
Chad, Eritrea, Ethiopia, Socotra, Somalia, Sudan.
East Tropical Africa
South Tropical Africa
Angola, Malawi, Mozambique, Zambia, Zimbabwe.
Southern Africa
Botswana, Cape Provinces, Caprivi Strip, Lesotho, Namibia, KwaZulu-Natal, Free State, Swaziland, Northern Provinces.
Western Indian Ocean
Comoros, Mauritius, Madagascar, Réunion, Rodrigues, Seychelles.
Asia-Temperate
Arabian Peninsula
China
China South-Central, China Southeast.
Eastern Asia
Japan, Korea, Nansei-shoto, Ogasawara-shoto, Taiwan.
Asia-Tropical
Indian Subcontinent
Assam, Bangladesh, East Himalaya, India, Maldives, Nepal, Sri Lanka, West Himalaya.
Indo-China
Andaman Islands, Cambodia, Laos, Myanmar, Nicobar Islands, South China Sea, Thailand, Vietnam.
Malesia
Borneo,Cocos Islands, Jawa, Lesser Sunda Islands, Malaya, Maluku, Philippines, Sulawesi, Sumatera, Christmas Isle.
Papuasia
Bismarck Archipelago, New Guinea, Solomon Islands.
Australasia
Australia
Norfolk Islands, New South Wales, Northern Territory, Queensland, South Australia, Victoria, Western Australia.
Pacific
Southwestern Pacific
Fiji, Gilbert Islands, New Caledonia, Samoa, Vanuatu.
Northwestern Pacific
Caroline Islands, Marshall Islands.
Northern America
South-Central U.S.A.
Southeastern U.S.A.
Alabama, Florida, Georgia, Louisiana, Mississippi, South Carolina.
Mexico
Mexico Central, Mexico Gulf, Mexico Southwest, Mexico Southeast.
Southern America
Central America
Belize, Costa Rica, Honduras, Nicaragua, Panama.
Caribbean
Cayman Islands, Cuba, Haiti, Jamaica.
Northern South America
French Guiana, Guyana, Suriname, Venezuela.
Western South America
Brazil
Brazil West-Central, Brazil Northeast, Brazil Southeast, Brazil North.
Southern South America ‘‘‘