Agenda - Council - 01/24/2012 - Laserfiche WebLink

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Grantees can only chose from TREE listings. Shrubs are not eligible for this grant program. EXPLANATORY NOTES This report provides information on native species in Minnesota for each of six Tree Rating Zones and for 21 Subsections which occur within them (see map on cover or on page 2). It is organized into six separate tables printed on different paper colors. MnRe Native Desi nation All species on each Tree Rating Zone list can be considered "native" to the plantir t sites in all of the Tree Rating Zone for the purpose of counting native trees and windbreak shrubs within the Minnesota ReLeaf program. Site suitable cuitivars and selections of the species listed may be counted as native. Minnesota ReLeaf participants are encouraged to use plants from local seed sources whenever that material is available as suitable nursery stock Purpose of this List of Native Spedes The Minnesota Legislature through the Legislative Comrrtission on Minnesota Resources (LCMR) approved funding in 1995 °97 for the Minnesota ReLeaf p ram stipulating in the appropriation language that the program "achieve the strategic planting of predominantly native shade trees and community windbreaks for statewide energy cortservation and carbon dioxide abatement ". Thus, this list of Trees and L< { S° ; :,..y ;; Spe Native to Minnesota's Ecological Regions was developed by the Minnesota Department of Natural Resources, Division of Forestry for pu es of determining what may be counted as a Minnesota "native" by communities undertaldng Minnesota ReLeaf projects. This list is not intended as a recommended species list because some of the plants listed have serious problems or limitations in their use. Nor should these lists be used to determine species for use In a native plant community restoration project. Species listed for each region may be very common throughout the region or may be found only in a limited number of sites with special conditions. MSA Tree Rating Zones The ecologically - defined regions called Tree Rating Zones are based upon the Ecological Classification System (ECS) in which the Minnesota Department of Natural Resources (DNR), in cooperation with national efforts, subdivided the state into three provinces (which are commonly called the prairie, hardwood forests, and boreal forests). These are further divided into Subsections based upon natural patterns of geology, soils, climate and native plant communities. (Three of the 21 original Subsections have recently been subdivided, as indicated on page 2, resulting in a new total of 24 Subsections). The Minnesota Society of ricuiture (MSA) worird with DNR Forestry staff to group the Subsections into six Tree Rating Zones. Basically, each of the three provinces was divided into two zones following the Subsection bourn ..; res. USDA Plant Hardin . : er nes The following tables also provide informat on the hardiness of the species. As shmast in the map above, the USDA Plant Hardiness Zones 2, 3 and 4 occur in Minnesota. For each species. the tables include either the range of minimum and nraalnmunt hardiness zones, or solely the minimum hardiness zone, as derived from various sources. (in some cases, zone information not available and is displayed n/a). Only shrubs Integral to the design and function of windbreaks will be funded through MnReLeaf. Therefore, this list of native species only includes shrubs which may grow six feet or taller. However, not all native shrubs listed here are likely to function well in a windbreak situation For purposes of eleaf, tree and windbreak shrub selection should take into account hardiness and site suitability as well as whether the species is native to the region. Suppl a mr ental Native Range info r trratlon The information in the right -side shaded columns of the folio wi tables is supplemental and indicates whether the native ra ge of each species includes all or p of the entire tree rating zone, and all, part, or none of ch ecological subsection. Dete ation of Native Spedes Lists Whether the species listed here are native in any part of Minnesota was determined by using two published sources of information: Elbert L. Little`s Atlas cafUnited Stares Trees and bey and Morley's Vas Plants of Minnesota Little °s work consists of range maps for tree and some shrubs based upon published botanical lists, herbarium specimens, and field observations which are considered to represent the pre - Columbian s,a,u es of vegetation. err they and Morley's work consists of state maps which show dots where specimens were collected primarily for the University of Minnesota herbarium. Ali 125 woody species (except Poison Sumac) which may t ;.w over six feet tall and which occur anywhere in Minnesota according to either of these sources are Included in the "Comprehensive List" on page 4 and in the following tables for each Tree Rating Zone. The tables for each Tree Rating Zone and subsection were developed by first determining if Little's range maps showed the species in all, part, or none of that ecolgical region. This information was supplemented by adding species (primarily shrubs and additional Juneberry, hawthorn, and willow species) that are in Ownhey, but not In Little. Out of these, most of the Juneberry, hawthorn, and willow are mentioned without pr.vlding specific ranges. For the other additional species in f1° =;::bey, as well as for species with collection points shown in bey beyond the range shown in Little, the ra •„ es were interpreted as "part" within a Tree Rating Zone or subsection if either a) two or more collection points were shown in °:bey, or one point was shown within about 80 miles of two points; or b) one collection point was shown in obey within about 80 miles of the Little ra map. The Little range mss and selected S bey maps have been digitized into computer files and are available from DNR Metro Forestry upon request. Several selections or subspecies (e.g., Freeman Maple and Flame Willa )that are genetically derived from native species were parenthetically added to the list.