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LITERATURE CITED

Angiosperm Phylogeny Group (APG). 1998. An ordinal classification for the families of the flowering plants. Annals of the Missouri Botanical Garden 85: 531-553.

Angiosperm Phylogeny Group (APG II). 2003. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II.  Botanical Journal of the Linnean Society 141: 399-436.

Angiosperm Phylogeny Group (APG III). 2009. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III.  Botanical Journal of the Linnean Society 161: 105-121.

Correll, D.S and M.C. Johnston, 1979. Manual of the vascular plants of Texas. University of Texas at Dallas, Richardson.

Evans, Douglas B. 1998. Cactuses of  Big Bend National Park.  Univ. Texas Press, Austin.

Flora of North America Editorial Committee, eds.  1993+.  Flora of North America North of Mexico.  12+ vols.  New York and Oxford.

Loflin B. & S. Loflin. 2009.
Texas cacti. Texas A&M University Press. College Station.

Morey, R. 2008. Little Big Bend.  Texas Tech. University Press. Lubbock

Powell, A.M. 1998. Trees and shrubs of the Tras-Pecos and adjacent areas. 
Univ. Texas Press, Austin.

Powell, A.M. 2000. Grasses of the Tras-Pecos and adjacent areas.  Iron Mountain Press, Marathon.

Powell A.M. J.F. Weedin, and S.A. Powell. 2008. Cacti of Texas: a field guide.
Texas Tech. University Press. Lubbock.

West, S. 2000. Northern Chihuahuan Desert wildflowers. Falcon Publishing, Helena.

Copyright 2002-2013, Stephen F. Austin State University.
All vascular plant images copyright
James Van Kley
Last updated:09/12/2013.


Desert lowlands Big Ben National Park