Scott Clark

Ambrosia psilostachya

Ambrosia psilostachya, or Western ragweed, has distinctive, deeply lobed, alternating leaves and an upright posture. Flowers are small and enclosed…

Amaranthus greggii

Amaranthus greggii, or Gregg’s Amaranth, is an annual with long, succulent stems and fleshy, deeply veined leaves. Its inconspicuous flowers…

Vigna luteola

Vigna luteola, commonly known as Hairy cowpea, is a short-lived perennial vine with small, curving yellow petals. It occurs not…

Rumex crispus

Rumex crispus, or Curly dock, is a perennial weed native to Europe and North Africa. It is a widespread invasive…

Stropostyles helvola

Sropostyles helvola, or Trailing wild bean, is a twining annual with trifoliate leaves. Its small flowers are distinctive with pink…

Spartina patens

Spartina patens, or Salt meadow cordgrass, is found everywhere from coastal foredunes to the high salt marsh, where it is…

Scutellaria integrifolia

S. integrifolia, or Helmut flower, is native to the eastern and southeastern United States, including Texas. While common along the…

Pyrrhopappus pauciflorus

Pyrrhopappus pauciflorus, or False dandelion is sometimes known as Texas dandelion. Its flower is a distinctive pale yellow with two…

Phyla nodiflora

Mimosa strigilossa

Mimosa strigilossa, or Powderpuff, blooms in an unmistakeable spherical ball of pink filaments with yellow caps. Its rows of oblong…