Trees and Shrubs of Wabu Woods SNA

Red maple (Acer rubrum)

Shape: Tree
Leaf/Branch Arrangement: Opposite
Flower: Red rounded cluster
Leaves: palmately lobed, 3-5 lobes, up to 5½ inches long and wide, toothed edges,
Bark: smooth, grey, becoming darker and furrowed with age
Fruit/Seed: pair of winged seeds, 2/3-1 inch long, wings at a 45-90 degree angle
Height: ...more ↓

Sugar maple (Acer saccharum)

Shape: Tree
Leaf/Branch Arrangement: Opposite
Flower: Green/yellow rounded cluster
Leaves: palmately lobed, 3 large lobes plus 2 small lobes, up to 6 inches long and 7 inches wide,
Bark: grey/brown, ridged
Fruit/Seed: pair of winged seeds, 1 inch long, wings at a 60-90 degree angle
Height: 60-100 ...more ↓

Mountain maple (Acer spicatum)

Shape: Multi-stemmed understory tree
Leaf/Branch Arrangement: Opposite
Flower: White elongated cluster
Leaves: palmetely lobed, 3-5 lobes, toothed edges, heart shaped base, 5 ½ inches long
Bark: mottled grey
Fruit/Seed: pair of winged seeds, 1 inch long, wings at a 90 degree angle
Height: 10-25 feet
...more ↓

Speckled alder (Alnus incana subsp. rugosa)

Shape: Multi-stemmed understory tree
Leaf/Branch Arrangement: Alternate
Flower: Brown/red elongated cluster – catkin, males 1 ¾-3 ½ inches long, females ¼ inch long
Leaves: 1½-4½ inches long, 1-3 inches wide, egg-shaped edges are jagged and coarsely double-toothed
Bark: grayish to reddish brown with pale horizontal lenticels
...more ↓

Bog rosemary (Andromeda polifolia var. latifolia)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: White-pink bell shaped
Leaves: evergreen, long and narrow, pointing upward, pointed tip, 1-2 inches long, 1/10-1/3 inch wide
Bark: brown, smooth
Fruit/Seed: round 5-sectioned capsule
Height: 6-20 inches
Flowering: May - ...more ↓

Yellow birch (Betula alleghaniensis)

Shape: Tree
Leaf/Branch Arrangement: Alternate
Flower: elongated cluster – catkin, male; groups of 1-3, at tips of year old branches, 2 ¼-4 ½ inches long, female, on new lateral twigs, ¾-1 ½ inches long
Leaves: oval with pointed tip, 2-4 ½ inches long, 1 ¼-2 ½ inches wide, double toothed
Bark: yellow, thin, translucent, peeling in ...more ↓

Paper birch (Betula papyrifera)

Shape: Tree
Leaf/Branch Arrangement: Alternate
Flower: Brown/yellow and red elongated cluster – catkin, males 2-3 ¾ inches long, females ½-1 inch long with red styles
Leaves: larger towards base, 2-3½ inches long, 1¼-2 1/3 inches wide, abruptly tapers to sharply pointed tip, base rounded to nearly straight across, edges irregularly ...more ↓

Leatherleaf (Chamaedaphne calyculata)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: White bell shaped
Leaves: leathery, elongated oval shaped, ¾-1 ½ inches long, ¼-1/2 inch wide, finely toothed
Bark: brown, scaly, finely hairy, turns gray with fine exfoliating texture
Height: 12-40 inches
Flowering: April - June
...more ↓

Pagoda dogwood (Cornus alternifolia)

Shape: Understory tree
Leaf/Branch Arrangement: Alternate
Flower: White rounded cluster
Leaves: oval with pointed tip, 2-4 ½ inches long, 1 ¼-2 ½ inches wide, 5-6 prominent veins per side that never reach leaf’s edge
Bark: green/brown-maroon, waxy, diamond shaped lenticels
Fruit/Seed: round, dark blue, berry, ¼ inch ...more ↓

Round-leaved dogwood (Cornus rugosa)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Opposite
Flower: White rounded cluster
Leaves: oval with pointed tip, 6-9 prominent veins per side that never reach leaf’s edge, 2-6 inches long and 1 ½-4 inches wide
Bark: twigs green-red/brown, older bark on lower stems green-brow/gray and rough
Fruit/Seed: round ...more ↓

Beaked hazelnut (Corylus cornuta subsp. cornuta)

Shape: Multi-stemmed understory tree
Leaf/Branch Arrangement: Alternate
Flower: Males; yellow/brown elongated cluster – catkin, 3 inches long Female; brown bud, red stiles at tip
Leaves: 2½-4½ inches long, 1¼-3 inches wide, widest above the middle, taper to sharply pointed tip, rounded to somewhat heart-shaped base, edges coarsely ...more ↓

Leatherwood (Dirca palustris)

Shape: Shrub
Leaf/Branch Arrangement: Alternate
Flower: Yellow tubular shaped
Leaves: egg shaped with pointed tip, 1 ½-3 inches long, 1-2 inches wide,
Bark: grey/brown, leathery, smooth
Fruit/Seed: berry-like, oval, ½ inch long, green-purple
Height: 3-6 feet
Flowering: April - May
...more ↓

Black ash (Fraxinus nigra)

Shape: Tree
Leaf/Branch Arrangement: Opposite
Flower: Maroon bead-like rounded cluster
Leaves: pinnately compound, 9-16 inches long, 7-13 pointed oval leaflets, leaflets 3-5½ inches long and 1-2¼ inches wide, stalkless
Bark: grey, mature bark has thin flat scale-like texture
Fruit/Seed: single winged seed, 1-1¾ inches ...more ↓

Green ash (Fraxinus pennsylvanica)

Shape: Tree
Leaf/Branch Arrangement: Opposite
Flower: Green/brown bead-like rounded cluster
Leaves: pinnately compound, 6-12 inches long, 5-9 pointed oval leaflets, leaflets 2½-5 inches long and 1-1¾ inches wide, very short winged stalk, finely toothed edges
Bark: grey, diamond patterned furrows
Fruit/Seed: single ...more ↓

Creeping snowberry (Gaultheria hispidula)

Shape: Creeping multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: White bell shaped, 4 petals
Leaves: evergreen, oval-round shape, ¼-1/3 inch long and 1/8-¼ inch wide, barely pointed tip, widely spaced bristly hairs along edges
Fruit/Seed: white berry, ¼ inch diameter, scattered brown hairs on surface
...more ↓

Bog laurel (Kalmia polifolia)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Opposite
Flower: Pink-purple bell shaped
Leaves: evergreen, ½-1 ¾ inches long, 1/8-1/2 inch wide, little-no leaf stalk, edges roll under, upper surface green and lower surface whitish
Bark: grey, smooth
Fruit/Seed: red,5-chambered round capsule, ¼ inch diameter, long ...more ↓

Twinflower (Linnaea borealis var. longiflora)

Shape: Small woody plant
Leaf/Branch Arrangement: Opposite
Flower: Pink and white, paired, bell shaped, 5 petals
Leaves: evergreen, oval, 1/3 to 2/3 inch long, ¼ to nearly 2/3 inch wide, sparsely hairy on upper surface, nearly smooth underneath, tapering to short stalk
Fruit/Seed:
Height: 3-6 inches
...more ↓

Fly honeysuckle (Lonicera canadensis)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Opposite
Flower: Yellow tubular shaped
Leaves: 1½-3½ inches long, 1-2 inches wide, edges toothless but fringed in fine hairs
Bark: brown – gray, often peeling in strips
Fruit/Seed: pair of berries, bright red, oval, each ¼-1/3 inch long, the pair point in opposite ...more ↓

Hairy honeysuckle (Lonicera hirsuta)

Shape: Vine
Leaf/Branch Arrangement: Opposite
Flower: Yellow tubular shaped
Leaves: egg shaped with pointed tip, 2-5 inches long, 1 ½-3 inches wide, pair at tip of flowering branch join around the stem
Bark: thin, gray, peeling
Fruit/Seed: round-oval berry, 1/3-1/2 inch long, orange/red
Height: 3-16 ...more ↓

Ironwood (Ostrya virginiana)

Shape: Understory tree
Leaf/Branch Arrangement: Alternate
Flower: elongated cluster – catkin, male; ¾-2 ¼ inches long, red/brown, composed of tightly closed scales, female; 1/8-1/2 inch long, green, nondescript

Leaves: oval, pointed tip, double toothed, finely hairy, 2-5 inches long and 1-2 inches wide
Bark: grey/brown, long ...more ↓

Woodbine (Parthenocissus vitacea)

Shape: Vine
Leaf/Branch Arrangement: Alternate
Flower: Green/yellow rounded cluster
Leaves: palmately compound with 5 leaflets, leaflets; up to 5 inches long and 2½ inches wide, end leaflets smallest, oval-elliptic shaped, widest at or above middle, coarsely toothed at least on tip half, tapering to sharply pointed tip
Bark: ...more ↓

Quaking aspen (Populus tremuloides)

Shape: Tree
Leaf/Branch Arrangement: Alternate
Flower: elongated cluster – catkin, 1 ¼-3 ¼ inches long, tiers of red stamens/stigmas, white silky hairs
Leaves: round with pointed tip, 1 ¼-3 inches long, small rounded teeth, flat leaf stalk
Bark: white, dark furrows at bases of mature trees
Fruit/Seed: elongate cluster ...more ↓

Chokecherry (Prunus virginiana)

Shape: Understory tree
Leaf/Branch Arrangement: Alternate
Flower: White elongated cluster
Leaves: oval, abruptly pointed tip, 2 ½-4 inches long, 1-2 1/3 inches wide, finely serrated
Bark: brown/grey, smooth with pale lenticels
Fruit/Seed: red/purple – black berry, 1/3 inch diameter
Height: 10-25 feet
...more ↓

Northern red oak (Quercus rubra)

Shape: Tree
Leaf/Branch Arrangement: Alternate
Flower: males 1 ½-3 inch long string-like cluster, females short, stubby, and green with red styles
Leaves: pinnately lobes, bristle tips at end of lobes, sinuses between lobes indent less than halfway to midvein, 4-8 inches long, 4-5 ½ inches wide
Bark: grey with smooth “ski tracks” ...more ↓

Wild black currant (Ribes americanum)

Shape: Multi- stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: Yellow/green elongated cluster
Leaves: palmately lobed, 3-5 lobes, coarsely toothed, prominent veins, 1-2 inches long
Bark: new twigs green, hairy, and gland-dotted, older twigs dark reddish with white lenticels
Fruit/Seed: smooth, round berry, 1/3 ...more ↓

Prickly gooseberry (Ribes cynosbati)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: Green bell shaped
Leaves: palmately lobed, ¾-2 inches long, heart shaped base, 3-5 notched lobes, hairy
Bark: new twigs are green and have short hairs and prickles, second year twigs are gray-brown and thin sometimes splitting to reveal reddish stems, older lower ...more ↓

Skunk currant (Ribes glandulosum)

Shape: Multi-stemmed creeping shrub
Leaf/Branch Arrangement: Alternate
Flower: White simple shaped, 5 petals
Leaves: palmately lobed, 5-7 lobes, 1-2 inches long, 1 ¼-3 inches wide, coarsely toothed, heart shaped base
Bark: smooth, gray, tiny brown lenticels, the thin outer layer peels away
Fruit/Seed: round berry, ¼-3/8 ...more ↓

Swamp red currant (Ribes triste)

Shape: Small shrub
Leaf/Branch Arrangement: Alternate
Flower: Green/pink elongated cluster
Leaves: palmately lobed, 3-5 primary lobes, 1 ½-3 ½ inches long, 2-4 inches wide, coarsely toothed, prominent veins
Bark: smooth, reddish brown, thin outer layer peels away
Fruit/Seed: shiny, smooth, bright red berry ¼-3/8 inch in ...more ↓

Dwarf raspberry (Rubus pubescens)

Shape: Bramble
Leaf/Branch arrangement: Alternate
Flower: White simple shaped, 5-6 petals
Leaves: Alternately arranged, compound with three leaflets, leaflets 1¼ to 3 inches long, ¾ to 2 inches wide, lance-elliptic, center leaflet short-stalked and mostly diamond-shaped, lateral leaflets stalkless, tapering to a pointed tip, the base wedge ...more ↓

Pussy willow (Salix discolor)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: elongate fuzzy cluster – catkin, 1-4 inches long, male and female on different plants
Leaves: 1-3 inches long, 1 3/8 inches wide, 2-4 times longer than wide, pointed tip, irregularly toothed
Bark: grey
Fruit/Seed: cluster of elongated green capsules ...more ↓

Bog willow (Salix pedicellaris)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: elongated cluster – catkin, male; yellow, up to 1 inch long, female; green-red, 1 ½ inches long, male and female on different plants
Leaves: rounded tip, ¾-2 ¼ inches long, ¾ inch wide, 2-5 longer than wide, upper surface green and lower surface white
Bark: ...more ↓

Basswood (Tilia americana)

Shape: Tree
Leaf/Branch Arrangement: Alternate
Flower: White simple shaped, 5 petals
Leaves: uneven heart shaped, finely toothed, 4-6 inches long
Bark: grey, ridged and furrowed
Fruit/Seed: greenish, round, woody nut-like berry, ¼-1/3 inch diameter, covered in minutes hairs
Height: 60-110 feet
...more ↓

Lowbush blueberry (Vaccinium angustifolium)

Shape: Multi-stemmed shrub
Leaf/Branch Arrangement: Alternate
Flower: White bell shaped
Leaves: leathery, pointed oval, ¾-1 ½ inches long and 1/3-2/3 inch wide, finely serrated edges
Bark: green, smooth appearance
Fruit/Seed: round, blue berry, ¼-1/3 inch diameter
Height: 12-20 inches
...more ↓

Small cranberry (Vaccinium oxycoccos)

Shape: Small woody plant
Leaf/Branch Arrangement: Alternate
Flower: White nodding simple shaped, 4 petals
Leaves: leathery, tapered tip, evergreen, toothless, hairless, ¼-1/ inch long and 1/10-2/10 inch wide, edges rolled under
Bark: brown, branches wiry
Fruit/Seed: round berry, shiny dark red, ¼-1/2 inch ...more ↓

Edited by Minnesota Scientific and Natural Areas, some rights reserved (CC BY-SA)