American Amphitropical Disjunction
Working Group
(see figshare site for data and comments)

DISTRIBUTION MAPS:

Encyclopedia of Life

GBIF (Global Biodiversity Information Facility):

DISPERSAL DIASPORE DATABASE

INDEX TO PLANT CHROMOSOME NUMBERS (IPCN)

NOMENCLATURE
International Plant Names Index (IPNI)
The Plant List
World Checklist of Selected Plant Families (WCSP)

SPECIES LISTS NORTH AMERICA:

Mexico:
Rebman et al., 2016. Baja California, Mexico. [PDF] 
Villaseñor, 2016. Mexico. [PDF] 

USA and Canada:
Consortium of California Herbaria / Jepson eFlora (California)
Consortium of Pacific Northwest Herbaria (Northwestern USA, Western Canada)
Southwest Environmental Information Network-SEINet (Southwestern USA)

USDA Natural Resources Conservation Service (North America north of Mexico)

SPECIES LISTS SOUTH AMERICA:

Argentina:
Flora of Argentina

Bolivia:
Jørgensen et al., 2014. Bolivia.

Chile:
Flora of Chile

Peru:
Peru Checklist (Tropicos)

Southern Cone:
Flora del Cono Sur (Argentina, s. Brazil, Chile, Uruguay, Paraguay), after Zuloaga et al., 2008+.

SPECIFIC PLANT GROUPS:

Boraginaceae, subtribe Amsinckiinae

Solanaceae