Eurybia macrophylla, commonly known as the bigleaf aster, large-leaved aster, largeleaf aster or bigleaf wood aster, is an herbaceous perennial in the family Asteraceae that was formerly treated in the genus Aster. It is native to eastern North America, with a range extending from eastern and central Canada through the northeastern deciduous and mixed forests of New England and the Great Lakes region and south along the Appalachians as far as the northeastern corner of Georgia, and west as far as Minnesota, Missouri and Arkansas. The flowers appear in the late summer to early fall and show ray florets that are usually either a deep lavender or violet, but sometimes white, and disc florets that are cream-coloured or light yellow, becoming purple as they mature. It is one of the parent species of the hybrid Eurybia × herveyi.
Eurybia divaricata, the white wood aster, is an herbaceous plant native to eastern North America. It occurs in the eastern United States, primarily in the Appalachian Mountains, though it is also present in southeastern Canada, but only in about 25 populations in the provinces of Ontario and Quebec. In the U.S. it is abundant and common, but in Canada it is considered threatened due to its restricted distribution. It has been introduced to a number of countries in Europe. It can be found in dry open woods as well as along wood-edges and clearings. The species is distinguished by its flower heads that have yellow centers and white rays that are arranged in flat-topped corymbiform arrays, emerging in the late summer through fall. Other distinguishing characteristics include its serpentine stems and sharply serrated narrow heart-shaped leaves. The white wood aster is sometimes used in cultivation in both North America and Europe due to it being quite tough and for its showy flowers.
Eurybia is a genus of plants in the family Asteraceae that were previously included in the genus Aster. Most species are native to North America, although one is also present in northern Eurasia. There are 23 species in the genus, including 1 natural hybrid. The name was first applied by Alexandre de Cassini in 1820. The name is derived from Ancient Greek εὐρύς (eurús), meaning "wide", and βαιός (baiós), meaning "few", perhaps in reference to the small number of relatively wide ray florets.
Eurybia schreberi, commonly called Schreber's aster or nettle-leaved Michaelmas-daisy, is a perennial herb in the family Asteraceae. It is native to eastern North America, where it is present in Canada and the United States. The flower heads emerge in the late summer or early fall to show white ray florets and yellow disc florets. It is listed as endangered in Indiana and Iowa, of special concern in Tennessee and possibly extirpated in Maine.
Eurybia avita, commonly called Alexander's rock aster, is a rare North American plant species, a herbaceous perennial in the family Asteraceae that was formerly considered part of the genus Aster. It is native to the southeastern United States. It is of conservation concern as it is found in less than 50 sites, typically only in sandy soils near granite flatrocks, and it is most likely already extirpated in North Carolina. Its habitat is threatened by development and the recreational use of the area where it grows. It is very similar to both E. surculosa and E. paludosa and more research needs to be done to determine the exact relationship between the three species.
Eurybia spectabilis, commonly known as the eastern showy aster, simply showy aster or purple wood aster, is an herbaceous perennial native to the eastern United States. It is present along the coastal plain of the U.S. where it is most often found growing in dry, sandy soils. Although it is not considered threatened due to its extensive range, it is locally endangered in many states. The flowers appear in the fall and show ray florets that are a violet-purple and yellow disc florets. It is one of the parent species of the hybrid Eurybia × herveyi.
Eurybia chlorolepis, commonly known as the mountain wood aster, mountain aster, or Appalachian heartleaf aster, is a perennial, herbaceous plant native to the southeastern United States. It is present only at relatively high elevations in the Appalachian Mountains. Although it is not considered seriously threatened due to a large number of sites in some of its range, it is often locally endangered and possibly extirpated in the south of its range.
Eurybia saxicastelli, commonly known as the Rockcastle aster, is an herbaceous perennial native to the south eastern United States. It is present only in the states of Kentucky and Tennessee along the Rockcastle River and the nearby Big South Fork River. As a result of its extremely restricted range as well as human alterations to its habitat, it is considered critically imperiled by NatureServe. The flowers appear in the late summer through fall and have ray florets that are pale blue to pale white and yellow disc florets that turn purplish with age.
Eurybia sibirica, commonly known as the Siberian aster or arctic aster, is an herbaceous perennial native to north western North America and northern Eurasia. It is found largely in open areas of subarctic boreal forests, though it is also found in a wide variety of habitats in the region. It is similar in appearance to Eurybia merita, but their ranges overlap only near the border between the US and Canada, where E. sibirica is generally found at higher elevations.
Eurybia compacta, commonly known as the slender aster, is an herbaceous perennial native to the eastern United States from New Jersey to Georgia. It is commonly found along the coastal plain in dry sandy soils, especially in pinelands. While it is not considered to be in high danger of extinction, it is of conservation concern and has most likely been extirpated from much of its original range. The slender aster was for a long time considered to be a variety of E. surculosa, but Guy Nesom's recent research within the genus has shown that it is distinct enough to be treated as a species. It has also been shown to be related to E. avita and E. paludosa.
Eurybia hemispherica, commonly known as the southern prairie aster, is an herbaceous plant in the composite family (Asteraceae). It is native to the south-central United States, primarily the lower Mississippi Valley and southeastern Great Plains, from Kansas south to Texas and east to Kentucky, Tennessee, and the Florida Panhandle. Its natural habitat is typically in upland prairies or dry savannas. It is less commonly found in open moist areas, in sandy-loamy soil.
Eurybia conspicua, commonly known as the western showy aster, is a North American species of plants in the family Asteraceae. It is native to western Canada and the western United States.
Eurybia eryngiifolia, commonly known as the thistleleaf aster or coyote-thistle aster, is an herbaceous perennial in the family Asteraceae. It is native to the eastern United States where it is only present along the Florida panhandle and the nearby areas of southern Alabama and southwestern Georgia.
Eurybia radulina, commonly known as the roughleaf aster, is an herbaceous perennial in the family Asteraceae. It is native to western North America, where it is present primarily west of the Cascade Range in both Canada and the United States. Its habitats include dry rock outcrops, slopes, edges of forests, and oak woodlands.
Eurybia integrifolia, commonly called the thickstem aster, is an herbaceous perennial in the family Asteraceae. It is native to the western United States where it grows primarily in the Rocky Mountains, the Great Basin, and the Sierra Nevada in Washington, Idaho, Montana, Wyoming, Utah, Oregon, Nevada, and California.
Eurybia paludosa, commonly known as the southern swamp aster, is an herbaceous perennial in the family Asteraceae. It is native to the southeastern United States where it is confined to the Carolinas and the states of Georgia and Florida. It is generally confined to moist soils, though it can occasionally be found on sand hills along the coastal plain. The southern swamp aster is often confused with the closely related southern prairie aster, though they do not occur in the same habitats or geographical areas. Its flower heads emerge in the late summer through fall and show deep lavender to purple rays with yellow centres.
Eurybia merita, commonly known as the subalpine aster or arctic aster, is an herbaceous perennial native to northwestern North America, primarily from the Interior Mountains and Plateau system and Rocky Mountains in Canada, stretching south to Utah and extreme northern California. It is found largely in drier, open areas, generally at subalpine levels in mountains, though in more northern areas it is more common at lower elevations. It is similar in appearance to Eurybia sibirica, but their ranges only overlap near the border between the US and Canada, where E. sibirica is generally found at higher elevations than its relative. The flowers emerge in the late summer and display purple to violet ray florets and pale or creamy yellow disc florets.
Eurybia jonesiae, commonly known as Jones's aster or Almut's wood aster, is a North American species of herbaceous perennial native to the Southeastern United States, primarily in the state of Georgia with a few populations in eastern Alabama. It is found mostly in the Piedmont Region in rich oak-hickory-pine forest. Within these rich woods, it has an affinity for moist soils with habitats that include ravines, rocky ridges, and wooded slopes in the vicinity of rivers and streams. Due to its restricted range it is considered threatened by the Nature Conservancy. It has often been misidentified as Eurybia spectabilis and was declared a separate species quite recently in 1988. The flowers emerge in the late summer and persist into the fall bearing cream-coloured ray florets that become purple and yellow disc florets.
Symphyotrichum pygmaeum is a species of flowering plant in the family Asteraceae. Commonly known as pygmy aster, it is a perennial, herbaceous plant that may reach heights of 1.5 to 15 centimeters. Its summer-blooming flowers have purple to violet ray florets and yellow disk florets.
Symphyotrichum chapmanii is a species of flowering plant in the family Asteraceae native to the Apalachicola River drainage basin of Alabama and Florida. Commonly known as savanna aster, it is a perennial, herbaceous plant that may reach 30 to 80 centimeters tall. Its flowers have purple to blue-lavender ray florets and pale yellow disk florets. It is a wetland species and is of conservation concern. It may be extirpated in Alabama.
