Edwin Burnell Smith

Croptilon rigidifolium, called the stiff-leaf scratchdaisy, is a North American species of flowering plants in the tribe Astereae within the family Asteraceae. It has been found in the US State of Texas and also in the Mexican State of Nuevo León. Croptilon rigidifolium is an herb sometimes reaching a height of 150 cm (5 feet). Flower heads are yellow, with both ray florets and disc florets.

Coreopsis nuecensoides, commonly known as the Rio Grande tickseed, is a herbaceous, perennial flowering plant in the genus Coreopsis in the family Asteraceae. It is native to southern and southeastern Texas and may also occur in northern Mexico.

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Coreopsis gladiata, the pool coreopsis or coastalplain tickseed, is a North American species of perennial tickseeds in the family Asteraceae. It is native to the southeastern United States from eastern Texas to southeastern Virginia, primarily to the coastal plain. Coreopsis gladiata is a perennial herb up to 70 cm (28 inches) tall. Flower heads have yellow ray florets and purple disc florets. The species grows in swamps, bogs, depressions, and pine barrens.

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Houstonia ouachitana, the Ouachita bluet, is a species of plants in the coffee family. It is endemic to the Ouachita Mountains of Arkansas and Oklahoma. It is an herb up to 20 cm tall, with lanceolate basal leaves and narrowly linear cauline leaves.

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