Wildflowers, Grasses and Other Nonwoody Plants
A spiny annual with bright yellow flowers and dandelion-like leaves, buffalo bur is an introduced member of the nightshade family.
Mimosa quadrivalvis (also Schrankia nuttallii)
Sensitive briar is a dainty-looking legume with delicate, twice-compound leaves and flower heads resembling magenta pom-poms. The long, tough stems are covered with tiny thorns that snag your feet as you walk.
About Wildflowers, Grasses and Other Nonwoody Plants in Missouri
A very simple way of thinking about the green world is to divide the vascular plants into two groups: woody and nonwoody (or herbaceous). But this is an artificial division; many plant families include some species that are woody and some that are not. The diversity of nonwoody vascular plants is staggering! Think of all the ferns, grasses, sedges, lilies, peas, sunflowers, nightshades, milkweeds, mustards, mints, and mallows — weeds and wildflowers — and many more!