. Essentials of botany. Botany; Botany. ECOLOGY OF FKUITS 193 238. Tumbleweeds. — Late in the autumn, fences, par- ticularly on prairie farms that are not carefully tilled, often serve as lodging-places for immense numbers of certain dried- up plants known as tumbleweeds. These blow about over the level surface until the first snow falls. Fig. 144. Russian Thistle. and even after that, often traveling for many miles be- fore they come to a stop, and rattling out seeds as they go. Some of the commonest tumbleweeds are the Russian thistle (Fig. 144), the pig- weed (Amarantus alhus), the tickle-g
. Essentials of botany. Botany; Botany. ECOLOGY OF FKUITS 193 238. Tumbleweeds. — Late in the autumn, fences, par- ticularly on prairie farms that are not carefully tilled, often serve as lodging-places for immense numbers of certain dried- up plants known as tumbleweeds. These blow about over the level surface until the first snow falls. Fig. 144. Russian Thistle. and even after that, often traveling for many miles be- fore they come to a stop, and rattling out seeds as they go. Some of the commonest tumbleweeds are the Russian thistle (Fig. 144), the pig- weed (Amarantus alhus), the tickle-grass (Fig. 145), and a familiar pepper-grass (Lepidium). In order to make a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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