I''m kind of hurt that Doc Canada hasn't shown up and told me what to do with my Horse Tails.
I'm sorry protourist, I missed them when I was in your thread before. Horsetails (Equisetum spp.) are also called Scouring Rush because of their silica content, they're good for scouring pots. I've used them for fine sanding arrow shafts and the like. I also made a small basket out of them, once, but I don't have any pictures, and I gave the basket away.
Other than that, I don't know of any uses for them.
Just checked
Aboriginal Plant Use in Canada's Northwest Boreal Forest, Robin J. Marles (and others), UBC Press, 2000, ISBN# 0-7748-0738-5 and apparently they have some herbal uses.
And since it's you, protourist, I also checked
Plant Technology of First Peoples in British Columbia, Nancy J. Turner, UBC Press, 1998, ISBN# 0-7748-0687-7 .
And she says,:
"The rough, silicon-impregnated cell walls of horsetails make them ideal as abrasives for smoothing and polishing surfaces. Most aboriginal people today equate them with sandpaper. Coastal peoples and some interior groups used horsetails to polish wooden objects - such as canoes, feast dishes, boxes, spoons, arrow shafts and points, gambling sticks, and within the last century, knitting needles - although they preferred using dogfish (shark) skin. Coastal groups used all three species, especially Giant Horsetail. Interior peoples used Common Horsetail and Scouring-rush; they did not have access to Giant Horsetail..
Interior Salish peoples used horsetails for polishing and sharpening bone tools and for smoothing and finishing soapstone pipes. For the latter, the Nlaka'pamux sometimes used a mixture of grease and Lodgepole Pine pitch along with the horsetails. The Okanagan coated their pipes with salmon slime, allowed it to harden, then rubbed the surface with the horsetails. The Okanagan used horsetails to polish their fingernails. The Stl'atl'imx used them to sharpen arrowheads.
Some groups also used the black underground rhizomes of horsetails in the decorative imbrication of baskets. The Tlingit of Alaska used Marsh Horsetail rhizomes and probably those of other species to imbricate their fine spruce-root baskets; and the Dena'ina of Alaska used horsetail stems to decorate their birch-bark baskets. The Coast Salish peoples of British Columbia and Washington used the rhizomes and stems of Giant Horsetail for their baskets, and the Sanpoil-Nespelem, a Washington Okanagan group, used Scouring-rush rhizomes to imbricate both baskets and storage bags. The Blackfoot of Alberta crushed the stems to make a light pink dye for colouring Porcupine quills. The Tahltan, and probably other peoples, made whistles out of the stiff hollow stalks of Scouring-rush." (pages 62-63).
Doc