Polygala acanthoclada
Utah—Great Basin Desert-Bonneville Basin Region. Millard Co., Confusion Range, north side of Hwy 50, ~92 miles west of Delta; 39º04'42.7", 113º43.08.9", 1716 m.  Limestone-sandstone outcrops in pinyon-juniper zone. Intricately branched, spiny shrub, 25–75 cm high and broad, older plants with a large root; flowers yellow.  Samples of root-rhizome (rt-rh) and twig-leaf (tw-lf),  Richard Spjut & Paul Burchstead 16360. 22 June 2008

Polygala macradenia
Black Gap Wildlife Recrational Area, TX, 
Oct 2007

Polygala macradenia
Big Bend Natl. Park, TX, 
Spjut & Marin 14482, Oct 2001

Polygala pennae
Big Bend Natl. Park, TX, 
Spjut & Marin 15684, Feb 2004