Difference between revisions of "Stokesia laevis"

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|genus=Stokesia
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| growth_habit = ?  <!--- tree, shrub, herbaceous, vine, etc -->
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|species=laevis
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'''''Stokesia laevis''''' is a species of flowering plant native to southeastern North America, the only species in the genus '''''Stokesia'''''. It is in the [[Asteraceae|daisy family]].  The flowers appear in the summer and are purple (sometimes blue, pale purple, or even white).<ref>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=131617 28. Stokesia L’Héritier], ''[[Flora of North America]]''</ref> The plant is cultivated and several [[cultivar]]s are available.<ref>[http://www.freepatentsonline.com/PP10660.html United States Patent PP10660], published October 27, 1998</ref> It is sometimes known as '''Cornflower aster''' or '''Stokes' aster'''.
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Like a few other plants (such as some species of ''[[Vernonia]]''), it contains [[vernolic acid]], a vegetable oil with commercial applications.<ref>{{citation | journal = Plant Physiol. | year = 2002 | month = February | volume = 128 | issue = 2 | pages = 615–624 | doi = 10.1104/pp.010768 | pmc = 148923 | title = Transgenic Production of Epoxy Fatty Acids by Expression of a Cytochrome P450 Enzyme from Euphorbia lagascae Seed | author = Edgar B. Cahoon, Kevin G. Ripp, Sarah E. Hall, and Brian McGonigle }}</ref>
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Stokesia (Jonathan Stokes, M.D., 1755-1831 English botanist). Compositae. Stokes' Aster is one of the choicest and most distinct of American hardy perennial herbs, although little planted.
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Heads many-fld.; marginal fls. much larger, deeply 5-cut: involucre subglobose; outer leafy, the inner with foliaceous, pectinately spinulose-ciliate, spreading appendages; receptacle fleshy, flat, and naked: achene 3-4-angled, smooth: pappus of 4-5 thread-like, deciduous scales. The species is a blue-fld. plant about a foot high which at first glance has points in common with China asters, centaureas, and chicory. The heads are 3 or 4 in. across in cult. The marginal row of fls. is composed of about 15 ray-like corollas, which have a very short tube at the base and are much broadened at the apex and cut into 5 long, narrow strips.
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The plant is hardy as far north as Rochester, New York, and Boston, Massachusetts. Probably many persons have been deterred from trying it because it is native to South Carolina and Georgia, and because it is considered a greenhouse subject in some standard works on gardening. The fact that it is found wild in wet pine-barrens is also deceptive, for the roots, as Woolson and Keller testify, will decay if water stands on the soil in winter. Moreover, the plant has been praised by Meehan for its drought-resisting qualities. Stokes' aster should be planted in a well-drained sandy loam, not in cold and heavy clay. It blooms from August until hard frost. According to Chapman, the heads of wild specimens are only an inch across, but the size of heads in cultivated plants is stated by many horticultural experts to be 3 to 4 inches across. The heads are frequently used for cut-flowers. In the wild the heads are few in a cluster or solitary; in cultivation a good branch sometimes bears as many as nine heads. No double form seems to have appeared but a white-flowered form is now on the market.
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Stokesia laevis, Hill (S. cyanea, L'Her.). Much-branched, hardy perennial herb, 1-2 ft. high: branches often purplish, sometimes hairy when young: lvs. lanceolate; radical ones entire, tapering at the base into long, flattened stalks; cauline lvs. gradually becoming sessile, the uppermost with a few teeth near the base and half-clasping: fls. blue or purplish blue, 3-4 in. across. Aug.-Oct. S. C., Ga., to La.  
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Stokesia laevis, Hill (S. cyanea, L'Her.). Fig. 3699. Much-branched, hardy perennial herb, 1-2 ft. high: branches often purplish, sometimes hairy when young: lvs. lanceolate; radical ones entire, tapering at the base into long, flattened stalks; cauline lvs. gradually becoming sessile, the uppermost with a few teeth near the base and half-clasping: fls. blue or purplish blue, 3-4 in. across. Aug.-Oct. S. C., Ga., to La. B.M. 4966. Mn. 5, p. 214. A.G.25:117. F.E. 16:650. G.M.49:563. R.H. 1863:211. Var. alba, Hort., has white fls. Var. praecox, Hort., is a lavender-fld. sort.
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Var. alba, Hort., has white fls. Var. praecox, Hort., is a lavender-fld. sort.{{SCH}}
 
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==Cultivation==
 
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===Propagation===
 
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===Pests and diseases===
 
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==Species==
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==Varieties==
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==Gallery==
 
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File:Stokesialaevis.jpg| photo 1
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File:Stokesia laevis2.jpg| photo 2
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File:Stokesialaevis1.jpg| photo 3
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==References==
 
==References==
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*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
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<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
 
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
 
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
 
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
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Latest revision as of 20:06, 18 June 2010


Stokesia laevis0.jpg


Plant Characteristics
Habit   herbaceous

Height: ⇕ 10 in"in" can not be assigned to a declared number type with value 10. to 30 in"in" can not be assigned to a declared number type with value 30.
Width: ⇔ 8 in"in" can not be assigned to a declared number type with value 8. to 16 in"in" can not be assigned to a declared number type with value 16.
Lifespan: ⌛ perennial
Bloom: ❀ early summer, mid summer, late summer, early fall, mid fall, late fall
Cultivation
Exposure: ☼ sun, part-sun
Features: ✓ flowers
USDA Zones: 6 to 10
Flower features: ❀ orange, yellow, blue, purple, white
Scientific Names

Asteraceae >

Stokesia >

laevis >


Stokesia laevis is a species of flowering plant native to southeastern North America, the only species in the genus Stokesia. It is in the daisy family. The flowers appear in the summer and are purple (sometimes blue, pale purple, or even white).[1] The plant is cultivated and several cultivars are available.[2] It is sometimes known as Cornflower aster or Stokes' aster.

Like a few other plants (such as some species of Vernonia), it contains vernolic acid, a vegetable oil with commercial applications.[3]


Read about Stokesia laevis in the Standard Cyclopedia of Horticulture 

Stokesia (Jonathan Stokes, M.D., 1755-1831 English botanist). Compositae. Stokes' Aster is one of the choicest and most distinct of American hardy perennial herbs, although little planted.

Heads many-fld.; marginal fls. much larger, deeply 5-cut: involucre subglobose; outer leafy, the inner with foliaceous, pectinately spinulose-ciliate, spreading appendages; receptacle fleshy, flat, and naked: achene 3-4-angled, smooth: pappus of 4-5 thread-like, deciduous scales. The species is a blue-fld. plant about a foot high which at first glance has points in common with China asters, centaureas, and chicory. The heads are 3 or 4 in. across in cult. The marginal row of fls. is composed of about 15 ray-like corollas, which have a very short tube at the base and are much broadened at the apex and cut into 5 long, narrow strips.

The plant is hardy as far north as Rochester, New York, and Boston, Massachusetts. Probably many persons have been deterred from trying it because it is native to South Carolina and Georgia, and because it is considered a greenhouse subject in some standard works on gardening. The fact that it is found wild in wet pine-barrens is also deceptive, for the roots, as Woolson and Keller testify, will decay if water stands on the soil in winter. Moreover, the plant has been praised by Meehan for its drought-resisting qualities. Stokes' aster should be planted in a well-drained sandy loam, not in cold and heavy clay. It blooms from August until hard frost. According to Chapman, the heads of wild specimens are only an inch across, but the size of heads in cultivated plants is stated by many horticultural experts to be 3 to 4 inches across. The heads are frequently used for cut-flowers. In the wild the heads are few in a cluster or solitary; in cultivation a good branch sometimes bears as many as nine heads. No double form seems to have appeared but a white-flowered form is now on the market.


The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.



Read about Stokesia laevis in the Standard Cyclopedia of Horticulture 

Stokesia laevis, Hill (S. cyanea, L'Her.). Much-branched, hardy perennial herb, 1-2 ft. high: branches often purplish, sometimes hairy when young: lvs. lanceolate; radical ones entire, tapering at the base into long, flattened stalks; cauline lvs. gradually becoming sessile, the uppermost with a few teeth near the base and half-clasping: fls. blue or purplish blue, 3-4 in. across. Aug.-Oct. S. C., Ga., to La.

Var. alba, Hort., has white fls. Var. praecox, Hort., is a lavender-fld. sort.CH


The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.


Cultivation

Propagation

Pests and diseases

Varieties

Gallery

  • photo 1

  • photo 2

  • photo 3

References

  1. ↑ 28. Stokesia L’Héritier, Flora of North America
  2. ↑ United States Patent PP10660, published October 27, 1998
  3. ↑ Template:Citation

External links


Retrieved from "http://gardenology.mywikis.net/w/index.php?title=Stokesia_laevis&oldid=129642"