| PRA | any of several western American plants of the genus Cheiranthus having large yellow flowers |
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| PRA | any of several North American plants of the genus Erysimum having large yellow flowers |
| PRA | perennial cottony-white herb of southwestern United States |
| PRA | silky-leaved aromatic perennial of dry northern parts of the northern hemisphere |
| PRA | a large wagon with broad wheels and an arched canvas top |
| PRA | North American perennial with hairy basal pinnate leaves and purple flowers and plume-tipped fruits |
| PRA | a type of soil occurring under grasses in temperate climates |
| PRA | plant with mostly basal leaves and slender open racemes of white or pale pink flowers |
| PRA | a Midwest state in north-central United States |
| PRA | similar to the common sunflower with slender usually branching stems common in central United States |
| PRA | North American annual with red or rose-colored flowers |
| PRA | trillium of central United States having dark purple sessile flowers |