A fine course for CHurchill Canada botany or Arctic Botany in general. If your main focus is to photogrgraph botany, consider a macro lens essential. If you can only bring one lens, bring a macro. Plant life on the Tundra is dwarfed. One of the most beautiful, Orchis rotundifolia, is a terrestrial orchid with a flower spike no more than 3 inches tall.
None is larger than a quarter-inch.
Another species of orchid, with even smaller flowers, is mosquito-pollenated. Another beauty you'll want to capture is a Pingicularia vulgaris, a tiny carnivore that captures mosquitoes and other small insects on its sticky leaves, then digests them. At first glance, the flower looks like a violet. To do these and other flowers justice, you'll definitely need that macro. This will also be good for indoor shots.