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Sorbus americana

Sorbus americana Marsh.

Pyrus americana (Marsh.) DC.

Pyrus microcarpa (Pursh) Spreng.

Mountain Ash, American Mountain Ash

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderRosalesRose family and eight others
FamilyRosaceaeIncludes apples, apricots, plums, cherries, peaches, pears, raspberries, strawberries, almonds, roses, meadowsweets, photinias, firethorns, rowans, and hawthorns; many others
GenusSorbusAncient Latin name for this genus
Speciesamericana“Of of from America”

About plant names...

The American mountain-ash is a native of eastern North America. American mountain-ash is so named because it is often found in mountain locations—all these photos are from the mountains. They are also quite popular as landscape trees.

Plants: Trees reach 10-30' (3-9.1 m) in height and trunks are about 4-10" (10-25 cm) in diameter. Bark is light gray and smooth.

Leaves: Leaves occur in groups 13-17" (33-43 cm) long. Individual leaflets in each group are about 2-3" (5-7.6 cm) long and ⅝-1" (1.6-2.5 cm) wide.

Flowers: Tiny white flowers, each ⅛" (3.2 mm) around, occur in large groups.

Fruits: Flowers become thick clusters of bright orange-red berries, ⅛-¼" (3.2-6.3 mm) around.

Edibility: Raw mountain ash berries aren’t good for you, but they can be cooked into a beautiful jelly that is traditionally served with lamb, venison, or pork. The recipe is described in Backyard Foraging.

Online References:

Sorbus americana on Earl J.S. Rook's Flora, Fauna, Earth, and Sky ... The Natural History of the Northwoods

Sorbus americana on Carolina Nature, from Will Cook

Sorbus americana on CirrusImage.com

Sorbus americana on Wikipedia

Sorbus americana at the Vanderbilt University Bioimages web site

Sorbus americana at the Lady Bird Johnson Wildflower Center

Sorbus americana at the Virginia Tech Department of Forest Resources and Environmental Conservation

Sorbus americana on the USDA Forest Service's Fire Effects Information Database

Sorbus americana on Plants for a Future, a resource and information centre for edible and otherwise useful plants

References:

Sibley, David Allen, The Sibley Guide to Trees, Alfred A. Knopf, 2009, p. 290

Zachos, Ellen, Backyard Foraging: 65 Familiar Plants You Didn't Know You Could Eat, Storey Publishing, 2013, p. 104, 213

Sorbus americana (Mountain Ash, American Mountain Ash)

8/8/2015 · Mt. Wachusett
≈ 15 × 10" (37 × 25 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

8/8/2015 · Mt. Wachusett
≈ 9 × 6" (23 × 16 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

6/10/2016 · Monhegan Island, ME
≈ 26 × 20" (65 × 49 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

10/6/2011 · Pack Monadnock, 2200', Peterborough, NH
≈ 14 × 21" (34 × 52 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

10/5/2014 · Mt. Killington, Killington, VT
≈ 31 × 21" (79 × 52 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

8/8/2015 · Mt. Wachusett
≈ 24 × 16" (59 × 39 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

I was baffled at first by these strange red branchlets. · 10/5/2014 · Mt. Killington, Killington, VT
≈ 4 × 2½' (1.3 × 0.8 m)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/28/2013 · Cadillac Mountain, Acadia Naitonal Park, Bar Harbor, ME
≈ 7 × 4½" (16 × 11 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

10/6/2011 · Pack Monadnock, 2200', Peterborough, NH
≈ 15 × 10" (39 × 26 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

8/25/2017 · Pack Monadnock, near summit, Peterborough, NH
≈ 6 × 4" (16 × 11 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/7/2013 · Beech Hill, Dublin, NH
≈ 6 × 9" (16 × 23 cm)

Sorbus americana description by Thomas H. Kent, last updated 24 Sep 2017.

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Sorbus americana (Mountain Ash, American Mountain Ash)

9/19/2009 · Acadia National Park, Bar Harbor, ME
≈ 24 × 16" (62 × 41 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

8/25/2004 · Acadia National Park, Bar Harbor, ME

Sorbus americana (Mountain Ash, American Mountain Ash)

9/7/2013 · Beech Hill, Dublin, NH
≈ 9 × 6" (23 × 16 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

8/4/2006 · Mt. Mansfield, Stowe, VT ID is uncertain

Sorbus americana (Mountain Ash, American Mountain Ash)

Young leaves are shiny. · 9/7/2013 · Beech Hill, Dublin, NH
≈ 8 × 9" (21 × 23 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/7/2013 · Beech Hill, Dublin, NH
≈ 9 × 6" (23 × 16 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

8/25/2017 · Pack Monadnock, near summit, Peterborough, NH
≈ 19 × 14" (48 × 34 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/7/2013 · Beech Hill, Dublin, NH

Sorbus americana (Mountain Ash, American Mountain Ash)

10/6/2011 · Pack Monadnock, 2200', Peterborough, NH
≈ 16 × 24" (41 × 62 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/19/2009 · Acadia National Park, Bar Harbor, ME
≈ 29 × 24" (72 × 60 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

Unripe berries. · 8/8/2015 · Mt. Wachusett
≈ 9 × 6" (22 × 15 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/28/2013 · Cadillac Mountain, Acadia Naitonal Park, Bar Harbor, ME
≈ 4½ × 7" (11 × 16 cm)

Sorbus americana (Mountain Ash, American Mountain Ash)

9/19/2009 · Acadia National Park, Bar Harbor, ME

Range:

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