Symphyotrichum laeve var. geyeri
(Geyer's Aster)
Symphyotrichum laeve var. geyeri, Along Rist Canyon Rd., Larimer Co. 2169
Symphyotrichum laeve var. geyeri, Along Rist Canyon Rd., Larimer Co. 2167
Symphyotrichum laeve var. geyeri, Along Rist Canyon Rd., Larimer Co. 2175
Symphyotrichum laeve var. geyeri, Along Rist Canyon Rd., Larimer Co. 2181
Symphyotrichum laeve var. geyeri, Along Rist Canyon Rd., Larimer Co. 2184
| Scientific Name | Symphyotrichum laeve var. geyeri (Aster laevis var. geyerii) | USDA PLANTS Symbol | SYLAG |
| Common Name | Geyer's Aster, Smooth Blue Aster | ITIS Taxonomic Serial No. | 541092 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Life zones and habitat: Plains to subalpine (5000 to 10,500); open areas along streams, in meadows and open woodlands. Plant: Perennials 16 to 48 inches tall with 1 to 5 erect stems that are sometimes reddish near the ground; mostly hairless. Leaves: Lower stem leaves usually gone by flowering time; mid-upper leaves are alternate, linear-oblanceolate to lanceolate or elliptic, 0.3 to 5.5 inches long, clasping and with smooth surfaces and edges. Inflorescence: Composite flower heads in open branching clusters at the top of the plant and arising from upper leaf axils; each flower about 1-inch across with 13 to 23 rays, usually pale to dark blue or purple; 19 to 33 yellow disk florets turning purplish red with age; narrow phyllaries are in 4 to 6 layers and very unequal in length, green with black tips; peduncles are up to 2.5 inches long, hairless or minutely hairy. Bloom period: July to September. References: "Flora of Colorado" by Jennifer Ackerfield, Minnesota Wildflowers and Flora of North America. |
BONAP Distribution Map
Map Color Key |
Colorado Status: Native |
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Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains