Vegetation Classification and Mapping Project Report - USGS

B16 Three-leafed Sumac - Mormon Tea Talus Shrubland
Location: Mormon Tea - Three-leafed Sumac Talus Shrubland occurred in a few small areas throughout
the mapping area, including the southwestern corner of the northern section of the park, the northwestern
corner of the southern section of the park near Jasper Forest, and in several rocky outcrops in the
southern section of the park south of Jasper Forest. It was found on talus slopes and often in areas with
large sandstone boulders.
Photosignature: Large boulders and bedrock were the most distinct features in this map class. They appeared
as large blocks on the edges and slopes of mesas. Ephedra viridis and Rhus trilobata both appeared
as a deep green color. The talus slopes were often sparsely vegetated with a few individual specks of
shrubs scattered between the boulder cracks. Because it was difficult to distinguish different plant characteristics
among the talus slopes, this class was often lumped in with the Rim Complex.
G19
Figure.G31..Ground.photo.for.map.class.B16,.
Three-leafed.Sumac.-.Mormon.Tea.Talus.Shrubland.
Figure.G32..Photosignature.for.map.class.B16,.
Three-leafed.Sumac.-.Mormon.Tea.Talus.Shrubland.
Plant communities
Rhus trilobata - Ephedra (viridis, torreyana) Talus Shrubland
Group map class Colorado Plateau Mixed Bedrock and Tableland (1 of 3)
Management map class Vegetated Rim Complex (1 of 4)
Macrogroup map class Colorado Plateau Mixed Bedrock and Tableland (1 of 3)
Number of map units in park 19
Number of map units in park & environs 24
Number of map units less than 0.5 ha 6 (1.3% of total map class area)
Area of map class in park
36.2 ha / 89.5 ac
Total area of map class
98.3 ha / 242.8 ac
Proportion of land cover in park 0.1%
Proportion of map class in project environs 63.2%
Base map class accuracy user 9.1 (2.1 - 32.3), producer 20.0 (4.6 - 56.5)
Group map class accuracy user 52.9 (41.6 - 64.0), producer 73.0 (59.7 - 83.1)
Management map class accuracy user 72.4 (63.9 - 79.5), producer 77.8 (69.0 - 84.2)
Macrogroup map class accuracy user 52.9 (41.6 - 64.0), producer 77.1 (63.8 - 86.6)
Documentation for base map class
3 2003 relevés, 0 1996 relevés, 5 AA observation sites
Appendix G: Map Class summaries