Asked October 27, 2017, 5:42 PM EDT
All my adult life, I've referred to the plant, in the three images, as a "horsetail", but all of the WWW images show a green plant in very moist conditions, and none of the WWW photos are similar to what I 'captured'. This plant flourishes in an arid landscape, and in thin sandy soil. It grow up to five-feet tall, and most commonly, as a single 'stalk'. The submitted images were captured at Cherry Creek State Park, on Friday, 27Oct2017.. I am most interested in its scientific name.
Arapahoe County Colorado