River Warren Outcrops SNA

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			Renville County
			Central Minnesota

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Size

89 acres

Maps

Detail map (MN DNR)

Printable Maps with GPS coordinates

Parking

N44 37.973, W95 10.970

Hiking Trails

There are 1.6 miles of maintained horeseback trails on the site.

Hunting

All hunting and trapping. See Hunting and Trapping Regulations (MN DNR) for details.

Ecological Classification

Province

Prairie Parkland Province

Section

North Central Glaciated Plains

Subsection(s)

Minnesota River Prairie

Land Type Association(s)

Milan Alluvial Plain

Renville Till Plain

Native Plant Communities¹

Crystalline Bedrock Outcrop (Prairie), Minnesota River Subtype

Silver Maple - (Virginia Creeper) Floodplain Forest

Ownership

Links

Minnesota DNR

Comments

History
This SNA was designated August 22, 2016.

Management
There are plans for buckthorn and redcedar removal on about 85% of the site.

Overview
Designated on August 22, 2016, River Warren Outcrops SNA is one of Minnesota’s two newest SNAs. Its 89 acres include a prairie restoration, densely wooded bedrock outcrop, and floodplain forest along the east bank of the Minnesota River. Plains prickly pear and Kentucky coffee tree, two species of special concern in Minnesota, are found here.

Future management plans include the removal of buckthorn and redcedar from about 85% of the site, and continued restoration of a former agricultural field to prairie. An unusual feature of this SNA is 1.6 miles of horse trails. These trails were on the site when the land was purchased by the DNR, and they will continue to be maintained by the seller.

Visits

6/9/2017


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Wood Routed Sign


Prairie Restoration


Rock Outcrop


Long Pond


Oval Pond


Horse Trails

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MinnesotaSeasons.com Observations

Bacteria	apical chlorosis of Canada thistle (Pst) (Pseudomonas syringae pv. tagetis)

Birds	One bird species with conservation status in Minnesota has been seen here:
	Special concern	American White Pelican (Pelecanus erythrorhynchos)

	American Robin (Turdus migratorius) American White Pelican (Pelecanus erythrorhynchos) Barn Swallow (Hirundo rustica) Black-capped Chickadee (Poecile atricapillus) Blue Jay (Cyanocitta cristata) Common Yellowthroat (Geothlypis trichas) Eastern Wood-peewee (Contopus virens) Gray Catbird (Dumetella carolinensis) Killdeer (Charadrius vociferus) Northern Cardinal (Cardinalis cardinalis) Ovenbird (Seiurus aurocapillus) Pied-billed Grebe (Podilymbus podiceps) Red-tailed Hawk (Buteo jamaicensis) Red-winged Blackbird (Agelaius phoeniceus) Rose-breasted Grosbeak (Pheucticus ludovicianus) Sedge Wren (Cistothorus platensis) Song Sparrow (Melospiza melodia)

Fungi and Lichens	Artist’s Conk (Ganoderma applanatum) Black Knot (Apiosporina morbosa) Oat Crown Rust (Puccinia coronata f. sp. avenae)

Insects and Arachnids	common green darner (Anax junius) common whitetail (Plathemis lydia) dot-tailed whiteface (Leucorrhinia intacta) four-spotted skimmer (Libellula quadrimaculata) monarch (Danaus plexippus) spotted lady beetle (Coleomegilla maculata) twelve-spotted skimmer (Libellula pulchella) viceroy (Limenitis archippus) widow skimmer (Libellula luctuosa)

Mammals	eastern cottontail (Sylvilagus floridanus) eastern fox squirrel (Sciurus niger)

Plants	Two plant species with conservation status in Minnesota are found here:
	Special concern	Kentucky coffee tree (Gymnocladus dioicus) plains prickly pear (Opuntia macrorhiza)

	Plants frequently found in: Crystalline Bedrock Outcrop (Prairie): Minnesota River Subtype ROs12a1 Silver Maple - (Virginia Creeper) Floodplain Forest FFs68a

	Common Name Scientific Name alsike clover (Trifolium hybridum) American basswood (Tilia americana var. americana) American bugleweed (Lycopus americanus) American elm (Ulmus americana) American highbush cranberry (Viburnum opulus var. americanum) American vetch (Vicia americana ssp. americana) annual fleabane (Erigeron annuus) arum-leaved arrowhead (Sagittaria cuneata) Aunt Lucy (Ellisia nyctelea) Balkan catchfly (Silene csereii) Bicknell’s sedge (Carex bicknellii) big bluestem (Andropogon gerardii) Bigelow’s bottlebrush grass (Elymus hystrix var. bigeloviana) black medick (Medicago lupulina) black raspberry (Rubus occidentalis) black-seeded plantain (Plantago rugelii var. rugelii) bland sweet cicely (Osmorhiza claytonii) blue vervain (Verbena hastata) boxelder (Acer negundo var. negundo) bracted vervain (Verbena bracteata) bristly greenbrier (Smilax tamnoides) bull thistle (Cirsium vulgare) bur oak (Quercus macrocarpa var. macrocarpa) Canada anemone (Anemone canadensis) Canada moonseed (Menispermum canadense) Canada thistle (Cirsium arvense) Canadian clearweed (Pilea pumila) Canadian honewort (Cryptotaenia canadensis) Canadian white violet (Viola canadensis var. rugulosa) Canadian woodnettle (Laportea canadensis) catnip (Nepeta cataria) chokecherry (Prunus virginiana var. virginiana) cleavers (Galium aparine) clustered black snakeroot (Sanicula odorata) common boneset (Eupatorium perfoliatum var. perfoliatum) common buckthorn (Rhamnus cathartica) common burdock (Arctium minus) common dandelion (Taraxacum officinale ssp. officinale) common duckweed (Lemna minor) common evening primrose (Oenothera biennis) common milkweed (Asclepias syriaca) common motherwort (Leonurus cardiaca ssp. cardiaca) common mullein (Verbascum thapsus ssp. thapsus) common ragweed (Ambrosia artemisiifolia) common yarrow (Achillea millefolium) curly dock (Rumex crispus) cursed crowfoot (Ranunculus sceleratus) cut-leaved coneflower (Rudbeckia laciniata var. laciniata) early meadow rue (Thalictrum dioicum) eastern redcedar (Juniperus virginiana var. virginiana) field horsetail (Equisetum arvense) field pennycress (Thlaspi arvense) foxtail barley (Hordeum jubatum ssp. jubatum) giant chickweed (Myosoton aquaticum) giant goldenrod (Solidago gigantea) giant ragweed (Ambrosia trifida var. trifida) green ash (Fraxinus pennsylvanica) grimmia dry rock moss (Grimmia laevigata) ground ivy (Glechoma hederacea) hoary vervain (Verbena stricta) hound’s tongue (Cynoglossum officinale) Indiangrass (Sorghastrum nutans) ironwood (Ostrya virginiana var. virginiana) jack-in-the-pulpit (Arisaema triphyllum) Kentucky bluegrass (Poa pratensis ssp. pratensis) kidney-leaved buttercup (Ranunculus abortivus) lake sedge (Carex lacustris) late goldenrod (Solidago altissima) leadplant (Amorpha canescens) long-leaved chickweed (Stellaria longifolia) Missouri gooseberry (Ribes missouriense) musk thistle (Carduus nutans) narrow-leaved cattail (Typha angustifolia) northern hackberry (Celtis occidentalis) northern prickly ash (Zanthoxylum americanum) orchard grass (Dactylis glomerata ssp. glomerata) peachleaf willow (Salix amygdaloides) Pennsylvania buttercup (Ranunculus pensylvanicus) Philadelphia fleabane (Erigeron philadelphicus var. philadelphicus) plains cottonwood (Populus deltoides ssp. molinifera) plains prickly pear (Opuntia macrorhiza) prairie peppergrass (Lepidium densiflorum var. densiflorum) prairie rose (Rosa arkansana) quaking aspen (Populus tremuloides) red clover (Trifolium pratense) red elderberry (Sambucus racemosa var. racemosa) reed canary grass (Phalaris arundinacea) rough-fruited cinquefoil (Potentilla recta) sandbar willow (Salix interior) Siberian elm (Ulmus pumila) silver maple (Acer saccharinum) silvery cinquefoil (Potentilla argentea) smooth brome (Bromus inermis) smooth Solomon’s seal (Polygonatum biflorum var. commutatum) soft-stem bulrush (Schoenoplectus tabernaemontani) Sprengel’s sedge (Carex sprengelii) stinging nettle (Urtica dioica ssp. gracilis) sweet clover (Melilotus sp.) timothy (Phleum pratense) touch-me-not (Impatiens sp.) virgin’s bower (Clematis virginiana) Virginia stickseed (Hackelia virginiana) Virginia waterleaf (Hydrophyllum virginianum var. virginianum) water plantain (Alisma sp.) white clover (Trifolium repens) white snakeroot (Ageratina altissima var. altissima) wild blue phlox (Phlox divaricata ssp. laphamii) wild columbine (Aquilegia canadensis) wild grape (Vitis riparia) wolfberry (Symphoricarpos occidentalis) woodbine (Parthenocissus vitacea) woodland strawberry (Fragaria vesca ssp. americana) yellow goat’s beard (Tragopogon dubius) yellow star grass (Hypoxis hirsuta) yellow wood sorrel (Oxalis stricta) Acer negundo var. negundo (boxelder) Acer saccharinum (silver maple) Achillea millefolium (common yarrow) Ageratina altissima var. altissima (white snakeroot) Alisma sp. (water plantain) Ambrosia artemisiifolia (common ragweed) Ambrosia trifida var. trifida (giant ragweed) Amorpha canescens (leadplant) Andropogon gerardii (big bluestem) Anemone canadensis (Canada anemone) Aquilegia canadensis (wild columbine) Arctium minus (common burdock) Arisaema triphyllum (jack-in-the-pulpit) Asclepias syriaca (common milkweed) Bromus inermis (smooth brome) Carduus nutans (musk thistle) Carex bicknellii (Bicknell’s sedge) Carex lacustris (lake sedge) Carex sprengelii (Sprengel’s sedge) Celtis occidentalis (northern hackberry) Cirsium arvense (Canada thistle) Cirsium vulgare (bull thistle) Clematis virginiana (virgin’s bower) Cryptotaenia canadensis (Canadian honewort) Cynoglossum officinale (hound’s tongue) Dactylis glomerata ssp. glomerata (orchard grass) Ellisia nyctelea (Aunt Lucy) Elymus hystrix var. bigeloviana (Bigelow’s bottlebrush grass) Equisetum arvense (field horsetail) Erigeron annuus (annual fleabane) Erigeron philadelphicus var. philadelphicus (Philadelphia fleabane) Eupatorium perfoliatum var. perfoliatum (common boneset) Fragaria vesca ssp. americana (woodland strawberry) Fraxinus pennsylvanica (green ash) Galium aparine (cleavers) Glechoma hederacea (ground ivy) Grimmia laevigata (grimmia dry rock moss) Hackelia virginiana (Virginia stickseed) Hordeum jubatum ssp. jubatum (foxtail barley) Hydrophyllum virginianum var. virginianum (Virginia waterleaf) Hypoxis hirsuta (yellow star grass) Impatiens sp. (touch-me-not) Juniperus virginiana var. virginiana (eastern redcedar) Laportea canadensis (Canadian woodnettle) Lemna minor (common duckweed) Leonurus cardiaca ssp. cardiaca (common motherwort) Lepidium densiflorum var. densiflorum (prairie peppergrass) Lycopus americanus (American bugleweed) Medicago lupulina (black medick) Melilotus sp. (sweet clover) Menispermum canadense (Canada moonseed) Myosoton aquaticum (giant chickweed) Nepeta cataria (catnip) Oenothera biennis (common evening primrose) Opuntia macrorhiza (plains prickly pear) Osmorhiza claytonii (bland sweet cicely) Ostrya virginiana var. virginiana (ironwood) Oxalis stricta (yellow wood sorrel) Parthenocissus vitacea (woodbine) Phalaris arundinacea (reed canary grass) Phleum pratense (timothy) Phlox divaricata ssp. laphamii (wild blue phlox) Pilea pumila (Canadian clearweed) Plantago rugelii var. rugelii (black-seeded plantain) Poa pratensis ssp. pratensis (Kentucky bluegrass) Polygonatum biflorum var. commutatum (smooth Solomon’s seal) Populus deltoides ssp. molinifera (plains cottonwood) Populus tremuloides (quaking aspen) Potentilla argentea (silvery cinquefoil) Potentilla recta (rough-fruited cinquefoil) Prunus virginiana var. virginiana (chokecherry) Quercus macrocarpa var. macrocarpa (bur oak) Ranunculus abortivus (kidney-leaved buttercup) Ranunculus pensylvanicus (Pennsylvania buttercup) Ranunculus sceleratus (cursed crowfoot) Rhamnus cathartica (common buckthorn) Ribes missouriense (Missouri gooseberry) Rosa arkansana (prairie rose) Rubus occidentalis (black raspberry) Rudbeckia laciniata var. laciniata (cut-leaved coneflower) Rumex crispus (curly dock) Sagittaria cuneata (arum-leaved arrowhead) Salix amygdaloides (peachleaf willow) Salix interior (sandbar willow) Sambucus racemosa var. racemosa (red elderberry) Sanicula odorata (clustered black snakeroot) Schoenoplectus tabernaemontani (soft-stem bulrush) Silene csereii (Balkan catchfly) Smilax tamnoides (bristly greenbrier) Solidago altissima (late goldenrod) Solidago gigantea (giant goldenrod) Sorghastrum nutans (Indiangrass) Stellaria longifolia (long-leaved chickweed) Symphoricarpos occidentalis (wolfberry) Taraxacum officinale ssp. officinale (common dandelion) Thalictrum dioicum (early meadow rue) Thlaspi arvense (field pennycress) Tilia americana var. americana (American basswood) Tragopogon dubius (yellow goat’s beard) Trifolium hybridum (alsike clover) Trifolium pratense (red clover) Trifolium repens (white clover) Typha angustifolia (narrow-leaved cattail) Ulmus americana (American elm) Ulmus pumila (Siberian elm) Urtica dioica ssp. gracilis (stinging nettle) Verbascum thapsus ssp. thapsus (common mullein) Verbena bracteata (bracted vervain) Verbena hastata (blue vervain) Verbena stricta (hoary vervain) Viburnum opulus var. americanum (American highbush cranberry) Vicia americana ssp. americana (American vetch) Viola canadensis var. rugulosa (Canadian white violet) Vitis riparia (wild grape) Zanthoxylum americanum (northern prickly ash)