White flowers in a tightly-packed spike that bends over at the end. The flower spike is 2-14 inches long. The leaves have a heart-shaped base.
Leaves: Alternate
Longbristle Smartweed
Small pink flowers on spikes. Sometimes there is a gap between the lower flowers. There are long hairs where the leaf attaches to the stem, and at the base of the flowers.
Marsh Dewflower
Small, light purple or pink 3 petaled flower growing in between the leaves.
Maryland Golden Aster
Flowers in large, branched clusters. The center is darker yellow.
Maryland Senna
Bright yellow flowers with dark brown anthers. The compound leaves have 6-12 pairs of leaflets.
Mayberry
Bell-shaped white flower.
Midwestern Tickseed-Sunflower
Eight petaled flower with a yellow center disc.
Mimosa Tree
Tree with fern-like leaves and clusters of pink, fluffy, powder puff flowers.
Mock Strawberry
The flower has 5 blunt-tipped oval petals and a yellow center.
Morning Glory
Flowers can be white, pink, red, purple, or blue. They are funnel-shaped and grow in clusters of 1 to 5. Each flower opens once in the morning and lasts a few hours.