False Aster

Miss Chen
Description: This perennial plant is about 3-5' tall, branching frequently in the upper half. The green stems are glabrous, terete, and slightly ribbed. The alternate leaves are up to 6" long and ¾" across, becoming smaller and more narrow as they ascend the stems. They are narrowly lanceolate to oblanceolate, smooth along their margins, and glabrous; the uppermost leaves are linear. Each leaf tapers gradually to a short petiole-like base. The upper stems terminate in showy panicles of flowerheads; these flowerheads are produced in abundance. Each daisy-like flowerhead is about ¾" across, consisting of about 60 ray florets that surround numerous disk florets. The petaloid rays of the flowerheads are bright white and linear in shape (less often, they are slightly pink or slightly purple), while the tiny tubular corollas of the disk florets are bright yellow. Flowerheads have bases that are shallow and spreading, rather than cylindrically shaped; these bases are covered with overlapping floral bracts (phyllaries) that are light green and narrowly lanceolate in shape. The branching stalks of the panicle are similar to the stems and largely naked, except for narrow leaf-like bracts up to 1" long.

The blooming period occurs from late summer into the fall and lasts about 1 month. The florets are replaced by oblongoid achenes that are somewhat flattened; they are slightly broader at their apices than their bottoms. The apex of each achene has minute scales and a pair of bristles, although the bristles are not always present. The achenes usually fall only a short distance from the mother plant, unless they are carried about by water. The root system sometimes produces stolons that form plantlets at their tips.

Cultivation: The preference is partial or full sun, wet to moist conditions, and a fertile loamy soil. This plant can tolerate standing water for short periods of time and doesn't seem to be bothered by foliar disease to the same extent as many Aster spp. (Asters).

Range & Habitat: The native False Aster occurs occasionally in most areas of Illinois; it is slightly more common in southern Illinois than other areas of the state (see Distribution Map). Habitats include openings in floodplain forests, soggy thickets, alluvial meadows, prairie swales, marshes, and ditches.

Faunal Associations: The flowerheads attract many kinds of insects because their nectar and pollen are readily accessible. These insect visitors include long-tongued bees, short-tongued bees, wasps, flies, butterflies, skippers, moths, and beetles. A dagger bee, Perdita boltoniae, is an oligolege of Boltonia spp. Another bee that is somewhat oligolectic of these species is the long-horned bee, Melissodes boltoniae, which also visits the flowerheads of some Aster spp. False Aster is one of the host plants of a beetle, Microrhopala xerene, whose larvae mine the leaves. The ecological relationships of Boltonia spp. to vertebrate animals are probably similar to those of Aster spp. in wetland areas.

Photographic Location: A prairie swale at Meadowbrook Park in Urbana, Illinois.

Comments: False Aster has attractive foliage and flowers. Different varieties of False Aster have been described; the one that is typically encountered in the state, var. recognita, has flowerheads about ¾" across. In Cook County, var. microcephala also occurs, which has flowerheads that are ½" across or less. While Boltonia spp. (false asters) closely resemble Aster spp. (asters) in appearance, they differ from each other in the following characteristic: The achenes of false asters have minutes scales and/or a pair of bristles at their apices, while the achenes of asters have tufts of hair. As a result, the achenes of asters are carried more readily by the wind into new areas. The other false asters in Illinois are uncommon and differ from Boltonia asteroides by their leaves: Boltonia diffusa interior has linear leaves throughout, while Boltonia decurrens has leaves that are decurrent against their stems (i.e., the base or basal margins of each leaf lies along the surface of the stem).
😀 😁 😂 😄 😆 😉 😊 😋 😎 😍 😘 🙂 😐 😏 😣 😯 😪 😫 😌 😜 😒 😔 😖 😤 😭 😱 😳 😵 😠
* Only support image type .JPG .JPEG .PNG .GIF
* Image can't small than 300*300px
Nobody comment yet, write down the first!
Just Reply
Latest Article
Elite Article
Related Articles

You have any problems or suggestions, please leave us a message.

Please enter content
Download GFinger APP

Scan QR code, download GFinger APP to read more.

QR Code

Scanning QR Code, directly to see the home page

Switch Language
Sign out

Share good articles, GFinger floral assistant witness your growth.

Please go to the computer terminal operation

Please go to the computer terminal operation

Insert topic
Remind friend
Submit success Submit fail Picture's max size Success Oops! Something wrong~ Transmit successfully Report Forward Show More Article Help Time line Just Reply Invite you to chat together! Expression Add Picture comment Only support image type .JPG .JPEG .PNG .GIF Image can't small than 300*300px At least one picture Please enter content