Eragrostis Lehmanniana Herbaceous

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Rincon Mountain District 2. (Quercus emoryi - Quercus oblongifolia) / Eragrostis lehmanniana Herbaceous Association (P) (Emory oak - Mexican blue oak) / Lehmann lovegrass Herbaceous Association (P) This herbaceous community is characterized by a very sparse (<<5% cover) tree canopy (>2 m) of Emory oak (Quercus emoryi) and/or Mexi- Common species can blue oak (Quercus oblongifolia), with a dense (>40% cover) matrix • Quercus oblongifolia of perennial grasses solely dominated by Lehmann lovegrass (Eragrostis • Quercus emoryi lehmanniana). The canopy oaks are present as small (3–4 ft) trees that • Eragrostis lehmanniana provide minimal (1–2%) cover. Alligator juniper (Juniperus deppeana) and velvet mesquite (Prosopis velutina) are the only other documented tree species. The subcanopy stratum (0.5–2 m) is characterized by a diverse but sparse (5% cover) mix of shrubs and succulents, with no consistent dominants or common as- sociates. Documented subcanopy components include common sotol (Dasylirion wheeleri), catclaw acacia (Mimosa aculeaticarpa), pointleaf manzanita (Arctostaphylos pungens), Palmer’s century plant (Agave palmeri), desertbroom (Baccharis sarothroides), cactus apple (Opuntia engelmannii), and beargrass (Nolina microcarpa). The field stratum (<0.5 m) is characterized by a dense (>40% cover) matrix of Lehmann lovegrass (E. lehmanniana). This species accounts for virtually all cover in this stratum and only has one documented associate, Schott’s century plant (Agave schotti). Rincon Mountain District, Saguaro National Park Rincon Mountain District, Saguaro This herbaceous community covers 0.1% (30 ha/74 ac) of the Rincon Mountain District and is present on the low slopes along the eastern boundary of the park, mainly between the Miller and Turkey Creek trailheads. It is restricted to south-trending hills of varying grade (10–30%) from 1,350 to 1,600 meters (4,429–5,250 ft). The surface cover is characterized by shallow and well-drained, gravelly to skeletal loamy soils underlying a domi- nant layer of gravel and small rocks. Vegetation Inventory, Mapping, and Characterization Report, Saguaro National Park Rincon Mountain District, Saguaro National Park Rincon Mountain District, Saguaro.

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