50
Lily of the Valley
Azaleas, peonies, viburnum, wegeila, Siberian and Japanese Irises, phlox sublata, Dianthus, Dicentra Spectabilis, Allium Gigantum. Some of these are shrubs; some are bulbs. Also, Clematis Jackmanii...
It was named the May flower before they knew about the ship.
In the Northern Hemisphere yes.
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