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Recently Updated Plant Articles

Robin's Plantain

Robin's Plantain (Erigeron pulchellus)

Updated May 31st, 2023

A perennial favoring slightly dry sites of low soil fertility in open woodlands.

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Red Columbine

Red Columbine (Aquilegia canadensis)

Updated April 21st, 2023

A red-flowering perennial often found in partly-wooded rock outcroppings, also temporarily in disturbed woodlands.

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Northern White-Cedar

Northern White-Cedar (Thuja occidentalis)

Updated April 2nd, 2023

A slow-growing, medium-sized coniferous tree of the northeast, found on moist sites and those with neutral to alkaline pH.

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Recently Updated Ecoregion Articles

Dry grassland in the foreground, lush green shrubbery behind, and a dramatic, steep mountain behind it
North America » Northwestern Forested Mountains » Western Cordillera »

Wasatch and Uinta Mountains

Updated May 31st, 2023

A region of steep, high mountains mostly in Utah, with diverse vegetation cover, and separating three major watersheds.

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A flat, rocky area with scattered dead grass and low shrubs in the foreground, and a low mountain range in the background
North America » North American Deserts » Cold Deserts »

Central Basin and Range

Updated May 31st, 2023

A large, endorheic region of desert basins and north-south mountain ranges occupying much of Nevada and western Utah.

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A dry grassland with straw-colored grass with scattered dark green shrubs, some hazy mountains in the background
North America » North American Deserts » Cold Deserts »

Snake River Plain

Updated May 30th, 2023

An arid region along the Snake River, mostly in Idaho, with most of its water originating from higher elevations.

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Recently Updated ID / Comparison Guides (See All)

collage of Prairie Fleabane and Philadelphia Fleabane

Prairie Fleabane (Erigeron strigosus) vs. Philadelphia Fleabane (Erigeron philadelphicus)

Updated May 28th, 2023

These two species are usually easy to tell apart whether or not flowers are present, as they have major differences in flower structure as well as leaf shape and stem pubescence. E. philadelphicus prefers moister habitats, whereas E. strigosus prefers drier habitats with less competing vegetation, but ranges farther in all directions.

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collage of Robin's Plantain and Oakleaf Fleabane

Robin's Plantain (Erigeron pulchellus) vs. Oakleaf Fleabane (Erigeron quercifolius)

Updated May 25th, 2023

These species are frequently confused in their reported range of overlap, as they have similar growth habits and height. They have little habitat overlap however, and they can be easily distinguished by flowers, growth habit, and basal leaves. E. quercifolius is restricted to the southeastern coastal plain, on sandy, peaty, or occasionally shell rock soils, and is usually found on moist, sunny, disturbed sites. E. pulchellus is predominately a more inland species, ranges onto finer-textured soils, often on slopes, and prefers better-drained, less-disturbed, shadier sites. In the zone of overlap it is most frequent on the upper slopes of riparian forests in areas where streams have dissected the terrain, leading to steeper slopes than is typical in the coastal plain; it is also often more common on calcareous soils, but not restricted to these soils.

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collage of Philadelphia Fleabane and Robin's Plantain

Philadelphia Fleabane (Erigeron philadelphicus) vs. Robin's Plantain (Erigeron pulchellus)

Updated May 16th, 2023

These two species can be confused, as both have abundant basal leaves and clasping leaves along the stem, both can be found in lightly-shaded habitats, and they have overlapping bloom times. They are easily distinguished by flowers, and they also have little overlap in habitat, although differences in habitat may require close observation. E. philadelphicus has a broader range, is more common and widespread, and is found in a wider range of habitats, preferring moister, more disturbed habitats with richer soils, tolerating poor drainage, and ranging into full sun. E. pulchellus is more restricted to drier, less-disturbed, lightly-shaded habitats, in soil of low fertility.

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