Symphyotrichum puniceum, is a species of flowering plant in the family Asteraceae native to eastern North America. It is commonly known as purplestem aster, red-stalk aster, red-stemmed aster, red-stem aster, and swamp aster. It also has been called early purple aster, cocash, swanweed, and meadow scabish.
Symphyotrichum laeve is a flowering plant native to Canada, the United States, and Coahuila (Mexico). It has the common names of smooth blue aster, smooth aster, smooth-leaved aster, glaucous Michaelmas-daisy and glaucous aster.
Symphyotrichum sericeum is a species of flowering plant in the family Asteraceae native to central North America. Commonly known as western silver aster, western silvery aster, and silky aster, it is a perennial, herbaceous plant that may reach 70 centimeters tall. Its flowers have purple ray florets and pink then purple disk florets, and its leaves are firm and silvery-green.
Symphyotrichum frondosum is a species of flowering plant in the family Asteraceae native to western North America. Commonly known as short-rayed alkali aster, it is an annual or perennial herbaceous plant that may reach 140 centimeters tall.
Symphyotrichum pilosum is a perennial, herbaceous, flowering plant in the Asteraceae family native to central and eastern North America. It is commonly called hairy white oldfield aster, frost aster, white heath aster, heath aster, hairy aster, common old field aster, old field aster, awl aster, nailrod, and steelweed. There are two varieties: Symphyotrichumpilosum var.pilosum, known by the common names previously listed, and Symphyotrichumpilosum var.pringlei, known as Pringle's aster. Both varieties are conservationally secure globally and in most provinces and states where they are native.
Symphyotrichum prenanthoides is a species of flowering plant in the family Asteraceae known by the common name crookedstem aster. It is native to northcentral and northeastern North America.
Symphyotrichum shortii, commonly called Short's aster, is a species of flowering plant in the family Asteraceae. It is native to North America, where it is primarily found in interior areas east of the Mississippi River. Its natural habitat is in thin rocky soils of woodlands and thickets often around limestone bluffs. It is common throughout much of its range, although it is generally restricted to intact natural communities.
Symphyotrichum urophyllum is a species of flowering plant in the family Asteraceae native to eastern North America, commonly known as arrowleaf aster.
Symphyotrichum robynsianum is a species of flowering plant in the family Asteraceae native to northeastern North America. Common names include Robyns's aster, longleaf aster, and long-leaved aster.
Symphyotrichum racemosum is a species of flowering plant native to parts of the United States and introduced in Canada. It is known as smooth white oldfield aster and small white aster. It is a perennial, herbaceous plant in the family Asteraceae. It is a late-summer and fall blooming flower.
Symphyotrichum ciliatum is a species of flowering plant in the family Asteraceae native to North America and eastern Eurasia. Commonly known as rayless annual aster and rayless alkali aster, it is an annual, herbaceous plant that may reach over 70 centimeters in height. Each flower head has many whitish then pink disk florets and no ray florets ("rayless").
Symphyotrichum porteri is a species of flowering plant in the family Asteraceae endemic to the foothills of the Rocky Mountains in the U.S. states of Wyoming, Colorado, and New Mexico. Commonly known as Porter's aster, it is a perennial, herbaceous plant that may reach 10 to 50 centimeters tall. Its flowers have white, rarely pinkish, ray florets and yellow, becoming pink then brown, disk florets. S. porteri grows at elevations of 1,800–2,900 meters. Its limited range makes it a NatureServe Vulnerable (G3) species, and it is classified Critically Imperiled (S1) in Wyoming.
Symphyotrichum retroflexum is a species of flowering plant in the family Asteraceae native to the southeastern United States. Commonly known as rigid whitetop aster, it is a perennial, herbaceous plant that may reach 40 to 100 centimeters tall. Its flowers have blue to purple ray florets and cream to pale yellow then pinkish disk florets. It is known only from the Blue Ridge Mountains in Alabama, Georgia, North Carolina, South Carolina, Tennessee, and Virginia, where it grows in wooded areas at elevations of 400–1,500 meters. As of September 2021, NatureServe classified it as Apparently Secure (G4); it had been reviewed last in 1994 and is marked as "needs review". There is an introduced presence of S. retroflexum in southeast China.
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 anomalum is a species of flowering plant in the family Asteraceae native to Arkansas, Illinois, Kansas, Missouri, and Oklahoma. Commonly known as manyray aster, it is a perennial, herbaceous plant that may reach 20 to 120 centimeters tall. Its flowers have lavender or blue to purple, seldom white, ray florets and cream or light yellow, then pinkish-purple disk florets. Its flowers are attractive to butterflies. The lower leaves have untoothed margins and are heart-shaped at the base.
Symphyotrichum undulatum is a species of flowering plant in the family Asteraceae native to eastern North America. Commonly known as wavyleaf aster, it is a perennial, herbaceous plant that flowers August through October and may reach heights between 30 and 160 centimeters.
Symphyotrichum spathulatum is a species of flowering plant in the family Asteraceae native to western North America including northwestern Mexico. Commonly known as western mountain aster, it is a perennial, herbaceous plant that may reach 20 to 80 centimeters tall. Its flowers, which open in July and August, have violet ray florets and yellow disk florets.
Symphyotrichum adnatum is a species of flowering plant in the family Asteraceae native to the southeastern United States and the Bahamas. Commonly known as scaleleaf aster, it is a perennial, herbaceous plant that may reach 30 to 120 centimeters tall. Its flowers have lavender ray florets and yellow disk florets.
Symphyotrichum walteri is a species of flowering plant in the family Asteraceae native to the southeastern United States. Commonly known as Walter's aster, it is a perennial, herbaceous plant that may reach 20 to 100 centimeters tall. Its flowers have bluish-purple ray florets and yellow disk florets.
Symphyotrichum parviflorum is an annual and herbaceous plant commonly known as southwestern annual saltmarsh aster. It is native to Mexico, the Caribbean, most of Central America, Ecuador, and the southwestern United States. It is also known by the scientific name Symphyotrichum expansum.
