| Trailing
Arbutus, or Mayflower (Epigaea repens)
First photographed May 7 | | | Wild Oats (Uvularia sessilifolia)
First photographed May 10 | | |
| Sweet White Violet (Viola blanda)
First photographed May 10 | | | Hobblebush (Viburnum alnifolium)
First photographed May 11 | | |
| Red Trilium (Trillium erectum)
First photographed May 12 | | | Three-Leaf Goldthread (Coptis trifolia)
First photographed May 13 | | |
| Painted Trillium (Trillium undulatum)
First photographed May 15 | | | Indian Cucumber Root (Medeola virginiana)
First photographed May 16 | | |
| Fringed Polygala, or Gaywings (Polygala paucifolia)
First photographed May 17 | | | Kidney-Leaved Violet (Viola renifolia)
First photographed May 18 | | |
| Bluets (Houstonia caerulea)
First photographed May 18 | | | Common Strawberry (Fragaria virginiana)
First photographed May 18 | | |
| Starflower (Trientalis borealis)
First photographed May 19 | | | Pink Ladyslipper (Cypripedium acaule)
First photographed May 21 | | |
| Clintonia (Clintonia borealis)
First photographed May 21 | | | Wild Lily of the Valley, or Canada Mayflower (Maianthemum canadense)
First photographed May 22 | | |
| Tiarella, or Foamflower (Tiarella cordifolia)
First photographed May 22 | | | Greenish-Flowered Pyrola (Pyrola virens)*
First photographed May 24
*Tentative identification | | |
| Arrowhead Violet (Viola sagittata?) | | | Bunchberry (Cornus canadensis) | | |
| Yellow Lady's Slipper (Cypripedium parviflorum)
located in Bridgton | | | Dwarf Ginseng (Panax trifolius) | | |
| Small Whorled Pogonia (Isotria medeoloides) | | | Common Speedwell (Veronica officinalis) |
| |
| Miscellaneous | | | | | |