Vegetation Classification and Mapping Project Report - USGS

Appendix C: Global and local plant community descriptions
C.3 Shrubland
C.3.8. Isocoma drummondii - Pleuraphis jamesii Shrubland [Park Special]
Base map class
NatureServe common name
NatureServe code
Drummond.Goldenweed.-.Galleta.Shrubland
Drummond’s.Jimmyweed.-.James’.Galleta.Shrubland.[Park.
Special]
Park.Special
Summary:
This Isocoma drummondii dominated sand deposit association has only been described from Petrified
Forest National Park. Until further inventory is completed, there is no global information.
Classification confidence: 3 - Weak.
Classification comments:
Globally. Data are not available.
Petrified Forest National Park. This community type was newly described during the community
classification process of this project. One relevé was sampled; however, the unique
species composition did not allow this relevé to be placed into any of the existing NVCS communities.
Since we only had one relevé of this unique community type and three relevés in a
similar community type during an earlier classification effort (Thomas et al. 2003), we did not
have enough data to develop a new NVCS association. Therefore, this community type was
described as a unique local community type or a park special until further data are collected.
Vegetation hierarchy:
Physiognomic class N/A N/A
Physiognomic subclass N/A N/A
Physiognomic group N/A N/A
Physiognomic subgroup N/A N/A
Formation name N/A N/A
Alliance name
N/A
Ecological systems placement:
Ecological system unique ID
CES304.775
Ecological system name
Inter-Mountain.Basins.Active.and.Stabilized.Dune
NatureServe conservation status:
Global rank. Data are not available.
Distribution:
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 sampled of Isocoma drummondii -
Pleuraphis jamesii Shrubland (Park Special). It was located on a sand dune/sandsheet north of
Petrified Forest National Park on the eastern slopes of Chinde Mesa.
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