It is a sort of comb or teasel.
"Bramble-bees and Others" by J. Henri Fabre
At that time every man, except two, John Platt and Ralph Teasel, two of the men who were saved, were washed off.
"Narratives of Shipwrecks of the Royal Navy; between 1793 and 1849" by William O. S. Gilly
Those who have lived where teasels grow will understand this illustration.
"The Continental Monthly, Vol. 2, No 3, September, 1862" by Various
A teasel tick tickles!
"Exciting Adventures of Mister Robert Robin" by Ben Field
Flannels are subjected to several finishing operations, such as fulling, teaseling, pressing, and stretching.
"Textiles" by William H. Dooley
A Tozer teased the cloth with a teasel.
"The Romance of Names" by Ernest Weekley
She is of the teasel family, you know.
"Hildegarde's Holiday" by Laura E. Richards
Probably anything like that would tear the cloth, and I believe all of the mills use teasels.
"Under Fire" by Frank A. Munsey
The Contractile Filaments of the Teasel.
"Life of Charles Darwin" by G. T. (George Thomas) Bettany
It has been seen swarming in a teasel-field, near Selby, Yorkshire.
"British Butterfiles" by W. S. Coleman
At this time the nap is raised by beating the cloth with the spike head of the teasel plant or its substitute.
"Handicraft for Girls" by Idabelle McGlauflin
Teasels are grown in various spots in the south-east of France and in south Germany.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8" by Various