The Cofrin Memorial Arboretum 290 acres (120 hectares) surrounds the

University of Wisconsin–Green Bay The University of Wisconsin–Green Bay (UW-Green Bay, UWGB, or Green Bay) is a public university in Green Bay, Wisconsin, with regional campuses in Marinette, Wisconsin, Marinette, Manitowoc, Wisconsin, Manitowoc, and Sheboygan, Wisconsin, Shebo ...

campus in

Green Bay, Wisconsin Green Bay is a city in the U.S. state of Wisconsin. The county seat of Brown County, it is at the head of Green Bay (known locally as "the bay of Green Bay"), a sub-basin of Lake Michigan, at the mouth of the Fox River. It is above sea lev ...

, United States. Its six miles (10 km) of trails are open to the public. Today's Arboretum began in 1971, when a long-range campus plan was drawn up, recommending the creation of a park-like arboretum and trail system. In 1975, a major contribution in honor of John and Austin Cofrin enabled development of the trails, additional property, and improvements in the botanical plantings. At present the Arboretum contains the following areas: ; Keith White Prairie : 8.5 acres (3.4) maintained through prescribed burns. Grasses include big bluestem,

Indian grass ''Sorghastrum nutans'', commonly known as either Indiangrass or yellow Indiangrass, is a North American prairie grass found in the central and eastern United States and Canada, especially in the Great Plains and tallgrass prairies. Description ...

, and

switch grass ''Panicum virgatum'', commonly known as switchgrass, is a perennial warm season bunchgrass native to North America, where it occurs naturally from 55°N latitude in Canada southwards into the United States and Mexico. Switchgrass is one of the ...

. Flower species include yellow cone flower,

prairie dock Prairie dock is a common name for several plants: *'' Silphium perfoliatum'' *''Silphium terebinthinaceum ''Silphium terebinthinaceum'' is a member of the Asteraceae, a family that includes sunflowers, and is commonly referred to as prairie doc ...

lupin ''Lupinus'', commonly known as lupin, lupine, or regionally bluebonnet etc., is a genus of plants in the legume family Fabaceae. The genus includes over 199 species, with centers of diversity in North and South America. Smaller centers occur ...

black-eyed Susan ''Black-Eyed Susan; or, All in the Downs'' is a comic play in three acts by Douglas Jerrold. The story concerns a heroic sailor, William, who has been away from England for three years fighting in the Napoleonic Wars. Meanwhile, his wife, Susa ...

spiderwort ''Tradescantia'' () is a genus of 85 species of herbaceous perennial wildflowers in the family Commelinaceae, native to the Americas from southern Canada to northern Argentina, including the West Indies. Members of the genus are known by many co ...

, and

false indigo False indigo is a common name for several plants related to indigo; it may refer to: *''Amorpha'', particularly **''Amorpha fruticosa'', native to North America *''Baptisia'' See also *Indigo bush The common name indigo bush can refer to plants in ...

. ; Mahon Woods : a remnant of the indigenous forests, with 59 species of trees and shrubs including oaks (''

Quercus alba An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably '' ...

'', ''

Quercus rubra ''Quercus rubra'', the northern red oak, is an oak tree in the red oak group (''Quercus'' section ''Lobatae''). It is a native of North America, in the eastern and central United States and southeast and south-central Canada. It has been introdu ...

''), sugar maple (''

Acer saccharum ''Acer saccharum'', the sugar maple, is a species of flowering plant in the soapberry and lychee family Sapindaceae. It is native to the hardwood forests of eastern Canada and eastern United States. Sugar maple is best known for being the prima ...

''), and white pines (''

Pinus strobus ''Pinus strobus'', commonly called the eastern white pine, northern white pine, white pine, Weymouth pine (British), and soft pine is a large pine native to eastern North America. It occurs from Newfoundland, Canada west through the Great Lake ...

''). Other species include trillium (''

Trillium grandiflorum ''Trillium grandiflorum'', the white trillium, large-flowered trillium, great white trillium, white wake-robin or french: trille blanc, is a species of flowering plant in the family Melanthiaceae. A monocotyledonous, herbaceous perennial, the ...

''), trout lilies (''

Erythronium americanum ''Erythronium americanum'', the trout lily, yellow trout lily, or yellow dogtooth violet, is a species of perennial, colony forming, spring ephemeral flower native to North America and dwelling in woodland habitats. Within its range it is a very ...

'', ''

Erythronium albidum ''Erythronium albidum'', the white fawnlily or white trout lily, is a small herbaceous geophyte in the Liliaceae, lily family. It is also known as adder's tongue, white dog's-tooth violet, serpent's tongue, trout lily, deer tongue, and yellow sn ...

''), violets (''

Viola sororia ''Viola sororia'', known commonly as the common blue violet, is a short-stemmed herbaceous perennial plant that is native to eastern North America. It is known by a number of common names, including common meadow violet, purple violet, woolly bl ...

'', '' Viola pubescens''), and toothworts ('' Dentaria laciniata'', '' Dentaria diphylla''). ;

Niagara Escarpment The Niagara Escarpment is a long escarpment, or cuesta, in Canada and the United States that runs predominantly east–west from New York through Ontario, Michigan, Wisconsin, and into Illinois. The escarpment is most famous as the cliff over ...

: white cedar trees. ; Northern Barrens : An artificially developed sandy habitat for plant species that cannot flourish in the clay soils of the campus. ; Oak Savanna : scattered oak trees within fields of grasses and herbs. ; Paul Sager Tract : 20 acres (8 hectares) including small natural springs, 2 ponds, and associated wetlands. ; Succession Plots : 13 experimental plots ranging in age from 2 to 17 years of natural succession. At present, its plants include, in rough order of succession: lamb's quarters ('' Chenopodium album''), ragweed (''

Ambrosia artemisiifolia ''Ambrosia artemisiifolia'', with the common names common ragweed, annual ragweed, and low ragweed, is a species of the genus '' Ambrosia'' native to regions of the Americas. Taxonomy The species name, ''artemisiifolia'', is given because the le ...

''), foxtail grass (''

Setaria glauca Pearl millet (''Cenchrus americanus'', commonly known as the synonym ''Pennisetum glaucum''; also known as 'Bajra' in Hindi, 'Sajje' in Kannada, 'Kambu' in Tamil, 'Bajeer' in Kumaoni and 'Maiwa' in Hausa, 'Mexoeira' in Mozambique) is the most w ...

''), bluegrass ('' Poa pratensis''), quackgrass (''

Agropyron repens ''Elymus repens'', commonly known as couch grass, is a very common perennial species of grass native to most of Europe, Asia, the Arctic biome, and northwest Africa. It has been brought into other mild northern climates for forage or erosion cont ...

''), smooth brome (''

Bromus inermis ''Bromus inermis'' is a species of the true grass family ( Poaceae). This rhizomatous grass is native to Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the ...

''), goldenrods (''

Solidago canadensis ''Solidago canadensis'', known as Canada goldenrod or Canadian goldenrod, is an herbaceous perennial plant of the family Asteraceae. It is native to northeastern and north-central North America and often forms colonies of upright growing plants, ...

'', ''

Solidago graminifolia ''Euthamia graminifolia'', the grass-leaved goldenrod or flat-top goldentop, is a North American species of plants in the family Asteraceae. It is native to much of Canada (from Newfoundland to British Columbia), and the northern and eastern Un ...

'') asters ('' Aster novae-angliae'', ''

Aster ericoides ''Symphyotrichum ericoides'' (formerly ''Aster ericoides''), known as white heath aster, frost aster, or heath aster, is a species of flowering plant in the family Asteraceae native to much of central and eastern North America. It has been int ...

''), box elder (''

Acer negundo ''Acer negundo'', the box elder, boxelder maple, Manitoba maple or ash-leaved maple, is a species of maple native to North America. It is a fast-growing, short-lived tree with opposite, compound leaves. It is sometimes considered a weedy or inv ...

''), cottonwood (''

Populus deltoides ''Populus deltoides'', the eastern cottonwood or necklace poplar, is a Populus sect. Aigeiros, cottonwood Populus, poplar native to North America, growing throughout the eastern, central, and southwestern United States as well as the southern Ca ...

''), quaking aspen (''

Populus tremuloides ''Populus tremuloides'' is a deciduous tree native to cooler areas of North America, one of several species referred to by the common name aspen. It is commonly called quaking aspen, trembling aspen, American aspen, mountain or golden aspen, tr ...

''), sugar maple (''

''), American beech ('' Fagus grandifolia''), eastern hemlock ('' Tsuga canadensis'') and yellow birch (''

Betula alleghaniensis ''Betula alleghaniensis'', the yellow birch, golden birch, or swamp birch, is a large tree and an important lumber species of birch native to northeastern North America. Its vernacular names refer to the golden color of the tree's bark. In the pa ...

'').