434 WEED FLORA OF IOWA 



AMARANTHACEAE, AMARANTH FAMILY. 



Spreading Amaranth {Amaranthus blitoides Wats.)- 



Seeds lenticular or round to broadly egg-shaped, one-sixth in. in 

 diameter, both sides convex with distinct margin, glossy, black; 



3 a 



Fig. ,272. Spreading Amaranth (.Amaranthus blitoides). A, seeds. B, a broken 



specimen. C, an edge view. D, the natural size. 



(After Hillman, Bull. Nev. Agr. Exp. Sta.) 



seeds borne in ovoid-oblong utricle, 2-3-beaked by the persistent 

 style. Eeported in western alfalfa seed. 



Tumbleweed {Amaranthus graecizans h.) . 



Seeds lenticular or roundish, one-twenty-fourth in. in diameter, 

 glossy black, much like the preceding but smaller. In grasses and 

 lawn mixtures. 



9 % 



•".. 



FiH. 273. Tumbleweed (.Amaranthus graecizans). A, seeds. B, a broken one. 



C, the natural size. 

 (After Hillman, Bull. Nev. Agr. Exp. Sta.) 



Rough Pigweed {Amaranthus retro flexus L.). 



Seeds from one-eighteenth to one-twentieth in. in length; oval, 

 spherical or nearly spherical, both sides convex with a continuous 

 ring on the margin ; scar small ; smooth, black, shining ; seeds much 

 like A. blitoides but somewhat smaller. In seeds of red clover, 

 alsike, and timothy. 



