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Recently Updated Plant Articles

American Holly

American Holly (Ilex opaca)

Updated April 9th, 2021

A broadleaf evergreen tree that has the most northerly distribution of any broadleaf evergreen tree in North America; among other evergreen plants, only smaller shrubs and conifers persist farther north. Common and widespread in much of its range.

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Green Ash

Green Ash (Fraxinus pennsylvanica)

Updated April 9th, 2021

A widely-distributed tree found mostly in floodplains, riparian areas, and swamps, and occasionally found on drier sites; severely threatened by the emerald ash borer.

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Tuliptree

Tuliptree (Liriodendron tulipifera)

Updated April 9th, 2021

A large deciduous tree native to eastern North America, with distinctive four-lobed leaves and tulip-like blossoms.

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Recently Updated Ecoregion Articles

Adirondack High Peaks
North America » Northern Forests » Atlantic Highlands » Northeastern Highlands »

Adirondack High Peaks

Updated April 9th, 2021

Mid-elevations (1,500-2,800 feet) in the Adirondacks, covered in a more conifer-rich variant of northern hardwood forests.

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Berkshire Transition
North America » Northern Forests » Atlantic Highlands » Northeastern Highlands »

Berkshire Transition

Updated April 9th, 2021

A hilly, geologically diverse transition between the Berkshire mountains and lower elevations of coastal New England.

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St. John Uplands
North America » Northern Forests » Atlantic Highlands » Northeastern Highlands »

St. John Uplands

Updated April 9th, 2021

A mostly unpopulated, hilly upland region at the northern border of Maine, extending into Quebec and New Brunswick.

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Recently Updated ID / Comparison Guides

collage of Red Mulberry and White Mulberry

Red Mulberry (Morus rubra) vs. White Mulberry (Morus alba)

Updated April 4th, 2021

These species are usually easy to tell apart if looking at a pure species, but they readily hybridize and form intergrades, and it may not be possible to identify all individuals. Red mulberry mostly occurs in mature bottomland forests whereas white mulberry is more likely as a pioneer species in disturbed habitats.

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collage of Black Ash and Green Ash

Black Ash (Fraxinus nigra) vs. Green Ash (Fraxinus pennsylvanica)

Updated March 24th, 2021

Black and green ash are sometimes confused where their ranges overlap, but they are usually easily distinguished by several different characteristics. Both are found in poorly-drained, wet habitats, but black ash occupies a later stage of succession whereas green ash is more of a pioneer species.

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collage of Northern Red Oak and Jack Oak

Northern Red Oak (Quercus rubra) vs. Jack Oak (Quercus ellipsoidalis)

Updated February 15th, 2021

These two species are occasionally confused where their ranges overlap, but they can be distinguished with skill at any time of year. Northern red oak prefers richer sites and is much more shade tolerant. The two species can hybridize and form intergrades, so it may not be possible to identify all individuals.

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February 9th, 2021

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