oenothera harringtonii

Oenothera harringtonii is a species of flowering plant in the evening primrose family known by the common names Arkansas Valley evening primrose and Colorado Springs evening primrose. It is endemic to the state of Colorado in the United States.This species is part of the Oenothera caespitosa species complex. It is an annual, biennial, or short-lived perennial herb. It produces one or more stems from a basal rosette of leaves and a thick taproot. The stems reach up to 40 centimeters tall and are yellowish ...