Lablab
Labrador Tea
Lace Grass
Ladyfern
Lagenaria
Lakecress
Lamb Succory
Lambsquarters
Lamiastrum
Lamp Rush
Lance Asplenium
Lance Selfheal
Lanceleaf Buckthorn
Lanceleaf Figwort
Lanceleaf Fogfruit
Lanceleaf Grapefern
Lanceleaf Loosestrife
Lanceleaf Sage
Lanceleaf Thorow Wax
Lanceleaf Tickseed
Lanceleaf Wild Licorice
Laportea
Larch
Large Bullwort
Large Gray Willow
Large St. Johnswort
Large Toothwort
Large White Petunia
Large Whorled Pogonia
Large Yellow Loosestrife
Large-flower Primrose-willow
Largebract Ticktrefoil
Largebracted Plantain
Largeflower Bellwort
Largeflower Tickseed
Largeflower Valerian
Largefruit Amaranth
Largefruit Blacksnakeroot
Largeleaf Pondweed
Largeleaf Waterleaf
Largepod Pinweed
Largeseed Forget-me-not
Larkspur
Late Purple Aster