With the Coronavirus meaning that we cannot access museums, botanical gardens, zoos, National parks etc – we turn to Nature in our backyards and nearby. Here are some online resources to help out your IDENTIFICATION needs
UNITED KINGDOM
The Botanical Society has great ID resources here

The Field studies centre excellent charts – note there is a cost

Biodiversity resources might be helpful

You could Bioblitz your garden

If you have Wildflowers contact Wildflower Society
UNITED STATES
For United States – see the US NATIONAL NETWORK

AUSTRALIA
For Australia plants online ID here
For Australia Bioblitz see Australia Atlas
For wildflowers see the Society information
NEW ZEALAND
For Bioblitz see iNaturalist

Forest & Bird has great ID guides

LearnFromNature