Vegetation Classification and Mapping Project Report - USGS

Vegetation Classification and Distribution Mapping Report: Petrified Forest National Park
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 association occurred at 1790 m (5860 ft) elevation with
little slope (5%). This relevé had a presence of mudstone surface rocks.
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. Only one relevé was classified as Iva acerosa - Sporobolus
airoides Shrubland (Park Special), with total vegetation cover of 30%. This vegetation cover
consisted of 20% cover in the shrub stratum and 10% cover in the herbaceous stratum. The
species diversity for this relevé was 26 species. The vegetation in the shrub layer was dominated
by Iva acerosa with 8% cover. Parryella filifolia also had a fairly high cover in the shrub
layer with 4% cover. Sporobolus airoides dominated the herbaceous cover (7% cover).
Most abundant species:
Stratum Global species PEFO species
Short.shrub/ N/A Iva acerosa, Parryella filifolia
sapling
Herb.(field) N/A Sporobolus airoides
Other noteworthy species:
Global species
Data are not available.
PEFO species
Atriplex confertifolia, Hymenoxys
richardsonii
References:
Data are not available.
C38