Species Name Abronia ammophila
Synonyms Abronia ammophila |
Common Name Tweedy's Sand-verbena |
CPC Number 15422
Natures Serve Global Rank G1
Global Rank Review Date 12/8/2008
Description Abronia ammophila, a.k.a. the Wyoming sand verbena, is an upright, multi-branched perennial herb that is a member of the Nyctaginaceae family. It was first collected at the mouth of Pelican Creek along the north shoreline of Yellowstone Lake in 1885 by Frank Tweedy, and later named by Greene. Sticky glands cover the plant, except the corolla, causing the plant to be covered in sand. Leaf blades are succulent, oval to diamond-shaped, 1-2.5 cm long, and 0.6-1.5 c m wide. It starts flowering in the middle of June, and continues to bloom into September (or until the first frost), producing 15-35 greenish-white flowers subtended by membranous bracts (Galloway 1975, Greene 1900, Heidel 2007, Tweedy 1886, and Anderson and Harmon 2002).
A. ammophila was a Category 2 candidate for listing under the Endangered Species Act in 1993. However, the U.S. Fish and Wildlife Service excluded this category in 1996 (USFW 1993 and 1996).