bur


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bur

or

burr,

popular name for fruits that have barbed, pointed, or rough outgrowths. By clinging to the fur or hair of animals and the clothing of man they are transported from the parent plant, often great distances. Some common burs include those of the chestnut, burdock, bur marigold, and cocklebur. Burs are particularly obnoxious to sheep growers because of the difficulty of removing them from wool.

Bur

 

also Pur, a river in the Yakut ASSR, left-bank tributary of the Olenek River. Its length is 501 km, and its basin area is 13, 900 sq km. The Bur flows through the North Siberian Lowland and is fed by snow. The largest tributaries are the Ary-Ongorbut and the Kyra-Khos-Teriuttiakh.

burr

1, bur
1. a washer fitting around the end of a rivet
2. a blank punched out of sheet metal

burr

2, buhr, bur
1. short for buhrstone
2. a mass of hard siliceous rock surrounded by softer rock
References in periodicals archive ?
Forests of bur oak serve as breeding sites for numerous songbirds, including indigo bunting, vesper sparrow, and yellow-throated vireo, which breed in these areas exclusively.
Because they are rich in carbohydrates and fats, the bur oak's acorns are the number one "fruit" consumed by wildlife.
The size of a bur oak's root system depends on its environment.
Bur oaks are tough trees with few serious insect or disease problems.
Bur oaks have good resistance to both oak wilt and to borers but, when growing conditions are not ideal, can suffer from anthracnose, "witches' broom," and other fungal diseases.
We no longer need bur oak groves to act as safety nets for Conestoga wagons heading west.
One warm day in 1857, several hundred townspeople in San Marcos, Texas, gathered under the spreading branches of a bur oak to await the arrival of Sam Houston.
Bur oaks have always seemed friendly to me, with the spread of their sheltering branches often rivaling their height.
There's another bur oak that gives me a shiver every time I think of it.
A huge old bur oak guards the entrance to Simms Cave, and I like to imagine Clemens and his friends lounging in the tree, spinning dreams on a lazy summer afternoon.