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Boltonia decurrens

(Claspingleaf Doll's Daisy)

Overview

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Threatened

Threat status

Interesting Facts

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Common Names

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Common Names in English:

Claspingleaf Doll's Daisy, Clasping-Leaf Doll's-Daisy, Claspingleaf Dolls Daisy, Decurrent False Aster

Description

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Family Compositae

The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.

Genus Boltonia

Perennials , 30-200+ cm (rhizomatous , stoloniferous , or with basal offshoots ). Stems erect to ascending , branched distally (ribbed ), glabrous . Leaves basal (withering by flowering) and cauline; alternate; sessile (sometimes decurrent) ; blades 1-nerved, linear , subulate to lanceolate or oblanceolate (bases attenuate, cauline sometimes decurrent), margins entire to serrulate (teeth callous-tipped), (apices acute to acuminate) faces glabrous. Heads radiate , (10-100+) in leafy, corymbiform or paniculiform arrays. ( Peduncles bracteate or ebracteate , bracts leaflike or scalelike .) Involucres hemispheric , (2-5 ×) 3-14 mm. Phyllaries 30-55 in 3-6 series, 1-nerved (midribs thickened, resinous ; flat), linear to oblanceolate or spatulate , unequal to subequal , margins ± membranaceous , faces glabrous. Receptacles conic to hemispheric, obscurely pitted , epaleate. Ray florets 20-60, pistillate , fertile ; corollas white to lilac (laminae linear to elliptic ). Disc florets 50-400+, bisexual , fertile; corollas yellow, tubes shorter than funnelform throats , lobes 5, erect, triangular; style-branch appendages deltate. Cypselae dimorphic (brownish) ; ray ± triquetrous , margins arrowly winged , ribs 2 abaxial , 1 adaxial ; disc obovoid to cuneate or obcordiform, laterally compressed , margins winged or not, resin ducts present, faces often puberulent ; pappi persistent , usually of 2-3 sclerified awns plus (0-) 7-12 shorter bristles or scales in 1 series. x = 9.

Species 5: North America.[1]

Physical Description

Species Boltonia decurrens

Plants 50-200+ cm; basal offshoots , rhizomes, and stolons absent. Stems erect . Leaf blades linear-lanceolate to narrowly lanceolate; cauline 64-155 × 8-26 mm, bases decurrent. Heads in corymbiform to corymbo-paniculiform arrays; bracts 11-125 × 1-19 mm. Peduncles 3-53 mm; bracts 0-1(-3), linear to oblanceolate , 3-5(-9) mm. Involucres 3.2-4.3 × 8-9 mm. Phyllaries in 3-5 series, oblong to spatulate , subequal , apices acuminate to cuspidate , 0-1 merging down peduncles; outer 2.3-3.9 × 0.5-1 mm; inner 3-4 × 0.6-1 mm. Ray florets 45-60; corollas white to lilac, laminae 9-14 mm, tubes 0.6-1.1 mm. Disc florets 230-400+; corollas 1.8-2.4 mm. Cypselae obovoid to obcordiform, 1.5-2.6 × 1.1-1.9 mm, wings 0.3-0.4 mm wide; pappus awns 0.8-1.75 mm. 2n = 18. [source]

Boltonia decurrens is known only from the flood plains of the Illinois and Mississippi rivers . Present-day populations are isolated and restricted to disturbed alluvial habitats , old fields , roadsides, and disturbed wet lake shores that replaced its natural habitats of flooded lake shores and marshes. It is in the Center for Plant Conservation™s National Collection of Endangered Plants . [source]

Flowers: Bloom Period: July, August, September. • Flower Color: near white, pale pink, white

Size/Age/Growth

Size: 24-36" tall.

Habitat

Open alluvial soils in wet prairies, shallow marshes, open river creek and lake shores ; of conservation concern; 100-200 m [2].

Biology

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Growth

Culture: Space 24-36" apart.

Sunlight: Sun Exposure: Full Sun .

Temperature: Cold Hardiness: 5a, 5b, 6a, 6b. (map)

Taxonomy

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Synonyms

B. asteroides (Linnaeus) L&nbsp • B. latisquama A. Gray var. decurrens (Torrey & A. Gray) Fernald & Griscom • Boltonia asteroides var. decurrens (Torr. & Gray) Fern. • Boltonia glastifolia Michaux [not (Hill) L&nbsp • Boltonia glastifolia Michx. Var. decurrens Torr. & A. Gray • Boltonia latisquama var. decurrens (Torr. & Gray) Fern. & Grisc. • ritier var. decurrens (Torrey & A. Gray) Engelmann Ex A. Gray • ritier ] Var. decurrens Torrey & A. Gray

Notes

Name Status: Accepted Name .

Comment: Data Providers: Govaerts World Compositae Checklist A-G, Tropicos. GCC LSID: urn :lsid:compositae.org:names:8E7AE86C-4FBF-43FA-B3A4-3EF862BB3D37

Last scrutiny: 03-Sep-09

Similar Species

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Members of the genus Boltonia

ZipcodeZoo has pages for 14 species, subspecies, varieties, forms, and cultivars in this genus:

B. apalachicolensis (Apalachicola Doll's Daisy) · B. asteroides (Aster-Like Boltonia) · B. asteroides var. asteroides (White Doll's Daisy) · B. asteroides var. latisquama (White Doll's-Daisy) · B. asteroides var. latisquama 'Jim Crockett' (Boltons Aster) · B. asteroides var. recognita (White Doll's-Daisy) · B. asteroides 'Nana' (Boltons Aster) · B. asteroides 'Pink Beauty' (Boltons Aster) · B. asteroides 'Snowbank' (Boltons Aster) · B. caroliniana (Carolina Boltonia) · B. decurrens (Claspingleaf Doll's Daisy) · B. diffusa (Small-Head Boltonia) · B. diffusa var. diffusa (Smallhead Doll's Daisy) · B. diffusa var. interior (Smallhead Doll's Daisy)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 28, 2008:

Identifiers

Footnotes

  1. Vesna Karaman-Castro, Lowell E. Urbatsch "Boltonia". in Flora of North America Vol. 20 Page 17,353. Oxford University Press. Online at EFloras.org. [back]
  2. "Boltonia decurrens". in Flora of North America Vol. 20 Page 354, 356, 357. Oxford University Press. Online at EFloras.org. [back]
Last Revised: 7/15/2012