Oxybaphus linearis, Robinson (Allionia linearis, Pursh.)
Seed-time: July to September.
Range: Minnesota to Utah, southward to Mexico, Texas, and
Missouri to the Carolinas. Habitat: Prairies; dry, sandy fields and meadows.
Taller than either of the preceding species, the stem varying in height from one to four or more feet, erect, slender, round or only slightly angled near the base, smooth, glaucous, branching, and somewhat swollen at the nodes. Leaves one to three inches long, linear, thick, smooth, one-nerved, sessile or the lower ones short-petioled with obtuse tips, the upper ones distant and acutely pointed. Flower-stalks and involucres sparsely covered with glandular hairs, the latter obtusely five-lobed and about three-flowered; perianth also finely hairy, purple, bell-shaped, with stamens and style exserted beyond the five obtuse lobes. Seed very small, hard and nut-like, oblong obovoid, with five hairy ribs, the spaces between covered with minute tubercles.
Means of control the same as for the two preceding species.