Pseudostellaria sierrae is described a, new from northern California. Glabrous stems and leaves. a V-shaped apical notch in each ligulate petal. five yellow anthers, and seeds with minute projections oil each tubercle are features useful in distinguishing. P. sierrae from P. jamesiana (Torrey) W. A. Weber & R. L. Hartman, the congener widely distributed in the western United States. Pseudostellaria sierrae is found in mixed oak or conifer forests.
Rabeler, R. K. and Hartman, Ronald L. (2002). "Pseudostellaria Sierrae (Caryophyllaceae), a New Species from California." Novon 12.1, 82-86.