Appendix 15. ONSR USNVC Natural Community Descriptions TABLE OF CONTENTS N.B. Global components printed from Biotics on 12, Oct. 2005. Subset: Ozark National Scenic Riverways. (Copyright © 2005 NatureServe). OVERVIEW OF VEGETATIVE DESCRIPTIONS..........................................................................................3 I. FOREST..............................................................................................................................................................6 I.A.8.N.b. Rounded-crowned temperate or subpolar needle-leaved evergreen forest.................................................... 6 Pinus echinata Forest Alliance................................................................................................................................................................ 6 Pinus echinata / Vaccinium (arboreum, pallidum, stamineum) Forest...................................................................................................... 6 I.B.2.N.a. Lowland or submontane cold-deciduous forest............................................................................................... 10 Quercus alba - (Quercus rubra, Carya spp.) Forest Alliance .............................................................................................................. 10 Quercus alba - Quercus rubra - Quercus muehlenbergii / Cercis canadensis Forest............................................................................. 10 Quercus alba / Cornus florida Unglaciated Forest.................................................................................................................................. 15 Quercus rubra - (Acer saccharum) Forest Alliance ............................................................................................................................. 19 Quercus alba - Quercus rubra - Acer saccharum - Carya cordiformis / Lindera benzoin Forest .......................................................... 19 Quercus stellata - Quercus marilandica Forest Alliance...................................................................................................................... 24 Quercus stellata - Quercus marilandica - Carya (glabra, texana) / Vaccinium arboreum Forest.......................................................... 24 Quercus stellata - Quercus marilandica - Carya (glabra, texana) / Vaccinium arboreum Forest – Igneous Phase............................... 28 Quercus stellata Flatwoods Forest Alliance ......................................................................................................................................... 31 Quercus stellata / Cinna arundinacea Flatwoods Forest ........................................................................................................................ 31 Quercus velutina - Quercus alba - (Quercus coccinea) Forest Alliance.............................................................................................. 34 Quercus velutina - Quercus alba - Carya (glabra, ovata) Forest............................................................................................................ 34 Quercus velutina - Quercus coccinea - Carya texana Ozark Forest ....................................................................................................... 39 I.B.2.N.d. Temporarily flooded cold-deciduous forest..................................................................................................... 43 Acer negundo Temporarily Flooded Forest Alliance.......................................................................................................................... 43 Acer negundo Forest................................................................................................................................................................................ 43 Acer saccharum - Carya cordiformis Temporarily Flooded Forest Alliance..................................................................................... 48 Acer (saccharum, barbatum) - Quercus rubra - Carya cordiformis / Asimina triloba Forest ................................................................ 48 Platanus occidentalis - (Fraxinus pennsylvanica, Celtis laevigata, Acer saccharinum) Temporarily Flooded Forest Alliance ..... 52 Fraxinus pennsylvanica - Celtis spp. - Quercus spp. - Platanus occidentalis Bottomland Forest .......................................................... 52 Platanus occidentalis - Acer saccharinum - Juglans nigra - Ulmus rubra Forest .................................................................................. 56 I.C.3.N.a. Mixed needle-leaved evergreen - cold-deciduous forest ................................................................................. 61 Juniperus virginiana - Quercus (muehlenbergii, stellata) Forest Alliance ......................................................................................... 61 Quercus muehlenbergii - Juniperus virginiana - Acer saccharum / Frangula caroliniana Forest......................................................... 61 Pinus echinata - Quercus (alba, falcata, stellata, velutina) Forest Alliance........................................................................................ 65 Pinus echinata - Quercus (alba, rubra) / Vaccinium (arboreum, pallidum) / Schizachyrium scoparium – Chasmanthium sessiliflorum – Solidago ulmifolia Forest...................................................................................................................................................................... 65 Pinus echinata – Quercus velutina – Quercus stellata / Vaccinium spp. Forest ..................................................................................... 70 II. WOODLAND..................................................................................................................................................75 II.A.4.N.a. Rounded-crowned temperate or subpolar needle-leaved evergreen woodland.......................................... 75 Pinus echinata Woodland Alliance....................................................................................................................................................... 75 Pinus echinata / Rock Outcrop Interior Highland Woodland ................................................................................................................. 75 II.B.2.N.a. Cold-deciduous woodland................................................................................................................................77 Quercus muehlenbergii Woodland Alliance......................................................................................................................................... 77 Quercus muehlenbergii - Fraxinus (quadrangulata, americana) / Schizachyrium scoparium Woodland.............................................. 77 Quercus stellata - Quercus marilandica Woodland Alliance............................................................................................................... 81 Quercus marilandica / Vaccinium arboreum / Danthonia spicata Scrub Woodland.............................................................................. 81 Quercus stellata - Quercus marilandica - Quercus velutina - Carya texana / Schizachyrium scoparium Woodland ............................ 85 II.C.3.N.a. Mixed needle-leaved evergreen - cold-deciduous woodland......................................................................... 88 Pinus echinata - Quercus stellata - Quercus marilandica Woodland Alliance................................................................................... 88 Pinus echinata - Quercus stellata - Quercus marilandica / Schizachyrium scoparium Woodland......................................................... 88 III. SHRUBLAND................................................................................................................................................92 III.B.2.N.d. Temporarily flooded cold-deciduous shrubland.......................................................................................... 92 Hamamelis vernalis Temporarily Flooded Shrubland Alliance......................................................................................................... 92 Hamamelis vernalis - Cornus obliqua - Hypericum prolificum Shrubland............................................................................................. 92 A15-1 Appendix 15. ONSR USNVC Natural Community Descriptions Salix caroliniana Temporarily Flooded Shrubland Alliance ............................................................................................................. 95 Salix caroliniana Temporarily Flooded Shrubland ................................................................................................................................. 95 V. HERBACEOUS VEGETATION...................................................................................................................98 V.A.5.N.m. Saturated temperate or subpolar grassland ................................................................................................. 98 Carex lurida - Carex leptalea - (Carex atlantica, Carex interior, Parnassia grandifolia) Saturated Herbaceous Alliance............. 98 (Carex interior, Carex lurida) - Carex leptalea - Parnassia grandifolia - Rhynchospora capillacea Herbaceous Vegetation.............. 98 V.A.6.N.q. Bedrock temperate or subpolar grassland with a sparse tree layer .......................................................... 102 (Juniperus