Fig 53. [Russian Thistle. Salsola Kali tenuifolia] G. F. W. Mey.

Russian Thistle. Salsola Kali tenuifolia G. F. W. Mey. This is not a thistle nor a cactus, but a pigweed. Concerning different stages of cleaning, note remarks above under Chenopodium album (see the figures). Seeds conical, the apex flattened or concave, both sides showing the long coiled embryo, light gray in color, about 2 mm. in diameter. Introduced from northern Europe into the north west and from there into Michigan. Well advertised, though not of high rank as a weed in this state. A tumble weed.

AMARANTH FAMILY. AMARANTHACEAE.

Fig 54. [Western Water Hemp. Acnida tuberculata Moq.]

Western Water Hemp. Acnida tuberculata Moq. Seeds smooth, highly polished, brown to jet-black, double convex, nearly circular, with a slight notch at one edge, .6-.8 mm. in diameter, smaller, lighter colored, and thin margins less conspicuous than those found on the seeds of Amaranthus circaezans. There are three varieties with seeds much the same as these. Native of low ground in central and southern Michigan.