1975
Gould, F.W. 1975. The grasses of Texas. Texas A & M Univ. Press, College Station, TX. 653 pp.
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taxonomy
Gould, F.W. 1975. The grasses of Texas. Texas A & M Univ. Press, College Station, TX. 653 pp.
Correll, D.S., and H.B. Correll. 1972. Aquatic and wetland plants of southwestern United States. 2 volumes. Stanford Univ. Press, Stanford, California. 1777 pp.
Spellenberg, R., and P. Knight. 1989. A new species of Erigeron (Asteraceae: Astereae) from central New Mexico. Madrono 36(2): 115-121.
Eastwood, Alice. 1909. Synopsis of the Mexican and Central American species of Castilleja. Proc. Amer. Acad. Arts 44: 563-591.
American Ornithologists' Union (AOU). Banks, R.C., C. Cicero, J. L. Dunn, A. W. Kratter, P. C. Rasmussen, J. V. Remsen, Jr., J. A. Rising, and D. F. Stotz. 2003. Forty-fourth supplement to the American Ornithologists' Union Check-list of North American Bi
Paulson, D.R. 2003. Comments on the Erythrodiplax connata (Burmeister, 1839) group, with the elevation of E. fusca (Rambur, 1842), E. minuscula (Rambur, 1842), and E. basifusca (Calvert, 1895) to full species (Anisoptera: Libellulidae). Bulletin of Americ
Chapman, A. D. 2005. Uses of Primary Species-Occurrence Data, version 1.0. Report for the Global Biodiversity Information Facility, Copenhagen. 111 p.