...It is our constantoccupation, morning and evenings, for half anhour, to pick the burs out of our clothes... 
James Richardson 「Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2」
... Her gown was torn and dusty,and fringed with burs and briars...
Charles W. Chesnutt 「The House Behind the Cedars」
...The chestnut crop was good and we knew that the first hard freeze would open the burs...
Eldred Nathaniel Woodcock 「Fifty Years a Hunter and Trapper」
...Slight wounds into which the virus may findaccess may be caused by barbed wire, stubbles, thorns, briers, grass burs, andsharp or pointed parts of feed...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Walking through the early October woods one day, I came upon a place where the ground was thickly strewn with very large unopened chestnut burs...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...The burs were ripe, and had just begun to divide, not "threefold," but fourfold, "to show the fruit within...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...As I proceeded to collect and open the burs, I was half prepared to hear an audible protest from the trees about, for I constantly fancied myself watched by shy but jealous eyes...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...It is an interesting inquiry how the squirrel knew the burs would open if left to know, but thought the experiment worth trying...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...Oursquirrels will cut off the chestnut burs before theyhave opened, allowing them to fall to the ground,where, as they seem to know, the burs soon dryopen...
John Burroughs 「Ways of Nature」
...And for the same reason they stick burs and mugwort on thegate or the hedge through which the cows go to pasture, becausethat is supposed to be a preservative against witchcraft...
Sir James George Frazer 「The Golden Bough」
...And for the same reason they stick burs andmugwort on the gate or the hedge through which the cows go topasture, because that is supposed to be a preservative againstwitchcraft...
Sir James George Frazer 「Balder The Beautiful, Vol. I.」
...Ditto, with representation of sand burs...
James Stevenson 「Illustrated Catalogue of the Collections Obtained」
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