PC Magazine Tech Encyclopedia Index - Definitions on common technical and computer related terms.
The tumbleweed, also known as the Russian Thistle, came to the prairies of the United States in the late 1870âs. It found its way here in grains and seeds imported from Russia. The Mennonites imported the tumbleweed in flax seed in 1877 to South Dakota.The tumbleweed first sprouted in Bon Homme County, South Dakota.Some people believe the Mennonites brought the tumbleweed deliberately, due to the discriminating way they had been treated.he Mennonites imported the tumbleweed in flax seed in 1877 to South Dakota. The tumbleweed first sprouted in Bon Homme County, South Dakota. Some people believe the Mennonites brought the tumbleweed deliberately, due to the discriminating way they had been treated.
Water lettuce is a free-floating aquatic plant whose origins are uncertain. An explorer in 18 th century Florida was the first person to record its presence in North America. Some experts believe it is native to the southeastern United States, while others believe it came from Africa, southern Asia or South America.ater lettuce is a prohibited plant in Florida, Louisiana, Mississippi and Texas, and is considered a noxious weed in South Carolina and Delaware. Water lettuce forms large, dense floating mats. The plant can adapt to life in ponds, lakes and quiet areas of rivers and streams, but cannot withstand salt water.