Vegetation Classification and Mapping Project Report - USGS

Appendix C: Global and local plant community descriptions
Environmental summary:
Globally. This association has only been described from Petrified Forest National Park. Until
further inventory is completed, there is no global information.
Petrified Forest National Park. This vegetation community occurred at about 1660 m (5430-
5460 ft) elevation. Slope was none to low (0-5.3%).
USFWS wetland system: Not applicable.
Vegetation description:
Globally. This association has only been described from Petrified Forest National Park. Until
further inventory is completed, there is no global information.
Petrified Forest National Park. Two relevés were classified as Salsola tragus Sand Dune
Vegetation (Park Special), with total vegetation cover of 14 and 18%. The vegetation cover
consisted of 3 and 4% cover in the shrub stratum and 10 and 15% cover in the herbaceous
stratum. The species diversity was 21 and 30 species. The vegetation in the herbaceous layer
was dominated by the non-native herbaceous forb Salsola tragus with 4 and 9% cover. No
other species had significant cover in either the shrub or herbaceous layers.
Most abundant species:
Stratum Global species PEFO species
Herb.(field) Data are not available. Salsola tragus
Other noteworthy species:
Global species
Data are not available.
PEFO species
Achnatherum hymenoides,
Atriplex obovata, Chamaesyce
fendleri, Ericameria nauseosa,
Gutierrezia sarothrae, Isocoma
drummondii, Pleuraphis jamesii,
Senecio spartioides, Sporobolus
airoides, Townsendia annua, Yucca
angustissima
References:
Data are not available.
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