Vegetation Classification and Mapping Project Report - USGS

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Appendix C: Global and local plant community descriptions Most abundant species: Stratum Short.shrub/ sapling Herb.(field) Global species Atriplex obovata Pleuraphis jamesii PEFO species Atriplex obovata Bouteloua eriopoda, Pleuraphis jamesii Other noteworthy species: Global species Data are not available. PEFO species Data are not available. References: Bourgeron and Engelking 1994, CONHP unpubl. data 2003, Driscoll et al. 1984, Francis 1986, Hansen et al. 2004b, Muldavin et al. 1998d, Western Ecology Working Group n.d. C69
Vegetation Classification and Distribution Mapping Report: Petrified Forest National Park C.4 Herbaceous C.4.3. Bouteloua gracilis - Pleuraphis jamesii Herbaceous Vegetation Base map class NatureServe common name NatureServe code Blue.Grama.-.Galleta.Herbaceous.Vegetation Blue.Grama.-.James’.Galleta.Herbaceous.Vegetation CEGL001759 Summary: These grasslands occur on alluvial flats, mesas, and plains in the semi-arid southwestern Great Plains and the Colorado Plateau in southeastern Colorado, New Mexico, northern Arizona and southern Utah. Elevation ranges from 1625-1890 m (5330-5654 ft) on the Colorado Plateau and extends below 1525 m (5000 ft) in the southwestern Great Plains. Sites are flat to undulating, with shallow to moderately deep, loam to silty clay loam-textured soil. Stands are codominated by the graminoids Bouteloua gracilis and Pleuraphis jamesii (= Hilaria jamesii). These short and medium-tall perennial bunch grasses may form a sod-like ground cover with patches of bare ground, especially where grazing by livestock encourages a prostrate growth form. Canopy cover is relatively sparse to moderately dense (20-80% cover). Other grasses include Buchloe dactyloides, Muhlenbergia torreyi, Sporobolus cryptandrus, Aristida spp., Achnatherum hymenoides (= Oryzopsis hymenoides), Pascopyrum smithii, Hesperostipa comata (= Stipa comata), or Hesperostipa neomexicana (= Stipa neomexicana). Forb cover is generally sparse but may be diverse. Characteristic species include Sphaeralcea coccinea, Grindelia squarrosa, Cryptantha spp., Machaeranthera pinnatifida, Ratibida spp., and Zinnia grandiflora. Scattered dwarf-shrubs, shrubs, and cacti, such as Gutierrezia sarothrae, Artemisia bigelovii, Artemisia frigida, Krascheninnikovia lanata, Prosopis glandulosa, Yucca glauca, Opuntia imbricata, and Opuntia polyacantha, are not uncommon. Codominance of Bouteloua gracilis and Pleuraphis jamesii distinguishes this vegetation from several closely related grasslands. Classification confidence: 2 - Moderate. Classification comments: Globally. More classification and survey work are needed to distinguish this type from closely related grasslands over its relatively broad geographic range, and to inventory its extent and condition. Petrified Forest National Park. This association tends to have low total vegetation cover and correspondingly low total herbaceous cover. Bouteloua gracilis consistently occurred in every relevé but with low cover (
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National Park Service U.S. Departme
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Vegetation Classification and Distr
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The National Park Service, Natural
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Acronyms and Abbreviations AA ac AP
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Executive Summary The classificatio
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Acknowledgments Behind the authors
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Axis 3 Axis 2 Vegetation Classifica
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20 Table 5. continued Plant communi
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40 Table 13. Base map class summary
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46 Table 16. Summary statistics for
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56 Table 22. Summary statistics for
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Literature Cited ties: Terrestrial
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B2 Appendix B Plant Community 2003
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B4 Appendix B .continued Plant Comm
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Appendix C: Global and local plant
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D3 Appendix D continued Scientific
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Appendix E Plant community and map
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Appendix E: Plant community and map
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Appendix F Plant community and map
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F3 Appendix F continued Plant commu
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Appendix F continued Plant communit
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G4 B1 Cottonwood / Rubber Rabbitbru
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G6 B3 Blue Sage Dwarf-Shrubland Fig
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G8 B5 Copperweed - Alkali Sacaton S
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G10 B7 Drummond Goldenweed - Gallet
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G12 B9 Greasewood / New Mexico Salt
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G14 B11 Iodine Bush Shrubland Figur
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G16 B13 Sandsage Colorado Plateau S
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G18 B15 Tamarisk Shrubland Figure.G
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G20 B17 Winter-fat / Blue Grama Dwa
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G22 B19 Alkali Sacaton - Blue Grama
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G24 B21 Blue Grama Herbaceous Veget
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G26 B23 Galleta - Alkali Sacaton He
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G28 B25 New Mexico Saltbush / Alkal
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G30 B27 Russian Thistle Sand Dune V
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G32 B29 Arizona Siltbush Sparse Veg
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G34 B31 Slender Buckwheat Sparse Ve
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G36 B33 Airstrip Figure.G65..Photos
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G38 B35 Barren Wash Figure.G68..Gro
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G40 B37 Park Sites Figure.G71..Phot
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G42 B39 Residences Figure.G73..Phot
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G44 B41 Run-off Control Feature Fig
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G46 B43 Stock Ponds Figure.G77..Pho
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G48 B45 Vegetated Wash Complex Figu
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Appendix H: Accuracy Assessment Dat
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Table H-4. Contingency table: Manag
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The Department of the Interior prot
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