Native. Annual. Propagates by seeds.
Time of bloom: June to September.
Seed-time: July to October.
A low, broadly spreading plant, eight to twenty inches high, with thick, succulent, very pale green, almost white stem, diffusely branching from the base, and having a shallow, pinkish white root. Leaves smooth, pale green, a half-inch to two inches long, spatulate, with rounded apex, the midvein extended as a minute bristle; petioles slender, paler than the blades. Flowers in small axillary clusters, green, with three membranous sepals and as many stamens, the three subtending bracts much longer, awl-like, sharp, rigid, the lateral ones smaller or sometimes wanting; seed with wrinkled, papery utricle longer than the sepals. When the plants mature the leaves fall away, the hardened stems bend inward, the stalk is uprooted or breaks off at the surface of the ground, and the weed rolls away to scatter the seeds wherever the wind wills. (Fig. 75.)
Destroy by hoe-cutting while young; tillage of cultivated crops should be long continued, in order to capture late-ripening plants.
Fig. 75. - Tumbleweed (Ama-ranthus groecizans). X 1/4
Odd corners and waste grounds should be well looked after, as many of the largest tumblers come from such places.