Symphyotrichum species

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Scientific Name Symphyotrichum ascendens (Aster ascendens) USDA PLANTS Symbol SYAS3
Common Name Western Aster ITIS Taxonomic Serial No. 522184
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills to montane (5000 to 10500 ft.); roadsides, meadows, along streams.
Plant: Erect perennial 4 to 48 inches tall, growing in colonies; single or multiple stems with dense, short hairs.
Leaves: Basal and stem leaves linear to narrowly-lanceolate, 3/4 to 4 inches long with smooth edges.
Inflorescence: Showy flower heads about 1 to 1-1/4 inches across with 25 to 65 narrow rays, pink to violet or blue; large number of yellow disk florets; recurved green phyllaries (bracts), rounded or with pointed tips.
Bloom period: July to September.
References: SEINet and "Flora of Colorado" by Jennifer Ackerfield.
BONAP Distribution Map

Colorado Status:
Native
Scientific Name Symphyotrichum foliaceum var. apricum (Aster foliaceus var. apricus) USDA PLANTS Symbol SYFO2
Common Name Alpine Leafybract Aster ITIS Taxonomic Serial No. 541088
Family Asteraceae (Sunflower) SEINet
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Description Life zones and habitat: Subalpine to alpine (10000 to 13800 ft.); slopes, meadows, along streams.
Plant: Erect perennial 2 to 8 inches tall, often purplish, hairy stems.
Leaves: Basal leaves oblanceolate and petiolate, usually withered by flowering; stem leaves ovate, lanceolate or oblanceolate and clasping.
Inflorescence: Showy flower heads 3/4 to 1-1/4 inches across with 15 to 60 rays, normally purple; large number of yellow disk florets; broad, almost leaf-like pointed phyllaries with purple edges and tips.
Bloom period: July to September.
References: SEINet and "Flora of Colorado" by Jennifer Ackerfield.
BONAP Distribution Map

Colorado Status:
Native
Scientific Name Symphyotrichum foliaceum var. canbyi (Aster foliaceus var. canbyi) USDA PLANTS Symbol SYFOC
Common Name Canby's Aster, Leafy Aster ITIS Taxonomic Serial No. 541089
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills and montane (5700 to 9800); meadows, open slopes and woods.
Plant: Highly variable variety. Erect perennial 8 to 40 inches tall.
Leaves: Basal leaves oblanceolate and petiolate, usually withered by flowering; stem leaves ovate, lanceolate or oblanceolate and clasping.
Inflorescence: One or more showy flower heads about 1 to 1-1/2 inches across with 15 to 60 rays, normally lavender to pink, but can be white (as below); large number of yellow disk florets; green phyllaries with white edges near their bases and rounded or somewhat pointed tips, outer are broadly oblanceolate and longer than inner which are lanceolate or linear.
Bloom period: July to September.
References: Flora of North America, E-Flora BC, SW Colorado Wildflowers and "Flora of Colorado" by Jennifer Ackerfield.
Note: The ID of this variety was based primarily on the clasping leaves and the phyllaries.
BONAP Distribution Map

Colorado Status:
Native
Scientific Name Symphyotrichum foliaceum var. parryi (Aster foliaceus var. parryi) USDA PLANTS Symbol SYFOP
Common Name Parry's Aster ITIS Taxonomic Serial No. 541090
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine. Moist areas along streams and wet meadows.
Plant: Highly variable variety. Erect perennial 8 to 40 inches tall; hairs in two vertical lines along the stems.
Leaves: Basal leaves oblanceolate and petiolate, usually withered by flowering; stem leaves ovate, lanceolate or oblanceolate and clasping, 3/4 to almost 5 inches long.
Inflorescence: Single to many composite flower heads in a rounded inflorescence, each 1 to 1-1/2 inches across with 15 to 60 rays, normally lavender to pink, but can be white (as below); large number of yellow disk florets; phyllaries smooth on the back, fringed on the edges, with white edges at the bases, outer and inner about the same length, linear-shaped and sharp-pointed.
Bloom period: July to September.
References: Descr. adapted from www.swcoloradowildflowers.com, E-Flora BC and "Flora of Colorado" by Jennifer Ackerfield.
BONAP Distribution Map

Colorado Status:
Native
Scientific Name Symphyotrichum spathulatum var. spathulatum (Aster spathulatus) USDA PLANTS Symbol SYSPS
Common Name Western Mountain Aster ITIS Taxonomic Serial No. 566344
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine (6000 to 10500 ft.); moist areas along streams and in meadows and forest openings.
Plant: Erect perennial 8 to 24 inches tall with one to several stems that are smooth or sparsely covered with downy hairs, especially below the inflorescence.
Leaves: Lower stem leaves narrowly oblanceolate to lanceolate to elliptic, up to 6 inches long, smooth surfaces with hairs along edges; shorter upper stem leaves narrowly-elliptic, lanceolate or linear and sessile.
Inflorescence: Three to 10 composite flower heads in rounded cluster (cymose panicle), each 1 to 1-1/2 inches across with 15 to 50 rays, normally purple, violet or bluish; 30 to 80 yellow disk florets; phyllaries in 3–5 series, narrowly oblong or linear and unequal in length, surfaces smooth or somewhat downy-hairy.
Bloom period: July to October.
References: "Flora of Colorado" by Jennifer Ackerfield, Aster spathulatus in "The Alpine Flora of the Rocky Mountains" by Richard W. Scott, American Southwest, SW Colorado Wildflowers, and Flora of North America
BONAP Distribution Map

Colorado Status:
Native
© Tom Lebsack 2021