Rincon Mountain District, Saguaro National Park Vegetation Inventory, Mapping,andCharacterization Report,Saguaro National Park interspersed with fine gravel, often covered with a dense layer litter. oakleaf of to 2,200meters (4,429–7,217ft)inelevation. The surface cover ischaracterized by large amixof boulders throughout the pinyon/oak woodland communities and upto the large /oak forests ranging from 1,350 Rincon Mountain District. This woodland istypically found inmid-elevation drainages and sheltered gullies This community iscontained within atwo-association map class that covers the 1.5%(410ha/1,013 ac)of sycamore (Platanuswrightii),and Arizona walnut (Juglans major). wrightii), black cherry (Prunusserotina), velvet ash ( Fraxinus velutina), Arizona madrone (Arbutus arizonica ), not compete for dominance with the characteristic oaks. Other associates include Wright’s silktassel (Garrya (0.25) asassociates inthe uppercanopy (>5m),with cover usually notsurpassing 5%. These species should ( common inclusions co-dominance of upto 20%. At the higher elevational this end of community, Arizona are lessconsistent (0.55,0.88)associates that, when present, typically provide cover lessthan of 5%,with un- and the other acommon associate. Border pinyon (Pinusdiscolor) and alligator () present asco-dominants, or with either one becoming the sole dominant prefers the higher-elevation/more sheltered locations. These species can evation/more exposedexamples, while silverleaf oak (Q. hypoleucoides ) which Arizona white oak (Q. arizonica) ismost dominant inthe low-el - wrightii). These species follow adistinct elevational/exposure gradient in able subcanopy (0.5–2m)often containing Wright’s silktassel (Garrya cus arizonica) and silverleaf oak ( Quercus hypoleucoides), with avari- cover) uppercanopy (>5m)co-dominated by Arizona white oak (Quer This woodland community ischaracterized by avariably dense (50–70% [Arizona whiteoak-Silverleafoak]IntermittentlyFloodedWoodland Association(P) Association (P) 80. [Quercusarizonica-hypoleucoides]IntermittentlyFloodedWoodland Pinus arizonica), ponderosa pinePinus ponderosa ( ), and Chihuahuan pine (Pinusleiophylla) may bepresent - • • • Common species

Garrya wrightii Quercus hypoleucoides Quercus arizonica Rincon Mountain District, Saguaro National Park