Rincon Mountain District, Saguaro National Park Vegetation Inventory, Mapping,andCharacterization Report,Saguaro National Park underlying parent material isprimarily composed gneissic of monzonite. quartz ing alayer coarse gravel of with consistent outcrops exposedbedrock of and large, detached boulders. The (4,429–5,577 ft). The surface cover ischaracterized by shallow and well-drained skeletal soils of loamunderly - (20%) rolling hills within broader, north-trending backslopes from anelevation 1,350to of 1,700meters and along the eastern the boundary of park. This wooded shrub savanna isprimarily present on low-gradient Rincon Mountain District, with main examples occurring along the northern slopes of Tanque Verde Ridge This community iscontained within atwo-association map class that covers the 11%(2,962ha/7,319 ac)of Schott’s century (Agaveschottii). nativeof perennial grasses, most commonly dominated by bullgrass (M. emersleyi) with the low succulent aculeaticarpa), and common sotol (Dasylirion dominant associate shrubs and succulents, including beargrass ( microcarpa ), catclaw mimosa(Mimosa typical dominance manzanita pointleaf of (A.) with pungens occasionally anumber of dominant and/or co- The subcanopy ischaracterized by the consistent presence (1.0)and single-stem trees with consistent (1.0)cover typically of lessthan 10%. (Q. emoryi)ispresent asshort (3m),shrub-like trees to tall (5m), bance, likely from the Chiva (1989)and Box Canyon (1999)fires. Emory All examples this of community exhibited signs historic of fire distur field stratum (<0.5m) dominated by bullgrass (Muhlenbergia emersleyi ). manzanita ( pungens),and ahighly variable (5–30%cover) (5–20% cover) subcanopy stratum (0.5–2m)dominated by pointleaf stratum (2–5m)dominated by Emory oak (Quercus emoryi),avariable This community ischaracterized by asparse (<10%cover) canopy Emory oak/PointleafmanzanitaBullgrassSemi-DesertWooded ShrubSavannaAssociation(P) Savanna Association(P) 62. Quercus emoryi/ Arctostaphylospungens/ wheeleri). The field stratum is characterized by adiverse mix MuhlenbergiaemersleyiWooded Shrub - • • • • • Common species

Agave schottii Nolina microcarpa Muhlenbergia emersleyi Arctostaphylos pungens Quercus emoryi Rincon Mountain District, Saguaro National Park