Magnolia: Magnolia spp. Magnoliaceae

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Magnolia (Magnolia spp.) consists of about 80 species from Asia [50], West Indies [8], Central/South America [10] and North America [8]. Some species separations are possible based on microanatomy. The genus Magnolia is dedicated to Pierre Magnol (16381715), professor of botany and medicine and director of the botanic garden at Montpellier, France.

Magnolia acuminata* black lin, black linn, blue magnolia, cowcumber, cucumber, cucumber magnolia, cucumbertree, cucumberwood, elkwood, magnolia, mountain magnolia, pointed-leaved magnolia, yellow cucumbertree, yellow-flower magnolia, yellow lin, yellow linn, yellow poplar, wahoo, wauhoo

Magnolia ashei ashe magnolia, cucumbertree, sandhill magnolia

Magnolia fraseri cucumber, cucumbertree, earleaf cucumber, earleaf cucumbertree,

earleaf umbrella-tree, Fraser magnolia, Fraser umbrella, In­dian bitters, Indian physic, long-leaf cucumbertree, magnolia, mountain-cucumber, mountain magnolia, mountain-oread, North Carolina bay-tree, umbrella-tree, water-lilly-tree, whahoo

Magnolia grandiflora* bat-tree, bull-bay, big-laurel, black lin, cucumberwood, ever
green magnolia, great laurel, large-flower magnolia, laurel, laurel bay, laurel-leaved magnolia, magnolia, mountain magno­lia, southern magnolia, sweet magnolia

Magnolia macrophylla big-bloom, bigleaf magnolia, cowcumber, cucumber,

cucumbertree, elkbark, great-leaved magnolia, large-leaf cucum­bertree, large-leaf magnolia, longleaf cucumber, long-leaved magnolia, mountain magnolia, pyramid magnolia, royal-oread, silverleaf, silverleaf magnolia, southern cucumbertree, umbrella- tree, large-leaved umbrella-tree, white cucumbertree

Magnolia pyramidata mountain magnolia, mountain-oread, pyramid magnolia, southern cucumbertree, wood-oread

Magnolia tripetala cucumber, cucumbertree, elk-browse, elkwood, Japanese magnolia, magnolia, umbrella magnolia, umbrella-tree, wahoo

Magnolia virginiana* bat-tree, bay, bay-tree, beaver-tree, big laurel, black lin, bullbay, cucumberwood, Indian-bark, laurel magnolia, magnolia, moun­tain magnolia, small magnolia, southern sweetbay, swampbay, swamp-laurel, swamp magnolia, swamp sassafras, sweetbay, sweet magnolia, sweetbay magnolia, Virginia magnolia, white- bay, white-laurel

* commercial species

Distribution: North America.

The Tree: Magnolia trees can reach heights of 80 ft (24 m), with a diameter of 3 ft (1 m).

General Wood Characteristics: The sapwood of magnolia is creamy white, while the heartwood is light to dark brown, often with greenish to purple-black streaks or patches. The wood is even-textured and moderately heavy, fairly hard and straight grained. It resembles yellow poplar (Liriodendron spp.). Magnolia is moderately stiff, high in shock resistance, and low in shrinkage. It has no characteristic odor or taste.

 

Weight

 

 

 

 

Species

MC

SGa

Weightb

lb/ft3

kg/m3

Magnolia acuminata

Green

0.44

49

785

(cucumbertree)

12%

0.48

33

529

 

Ovendry

0.52

NA

NA

Magnolia fraseri

Green

0.40b

47

753

(Fraser magnolia)

12%

0.44b

31

497

 

Ovendry

0.48

NA

NA

Magnolia grandiflora

Greenb

0.46

59

945

(southern magnolia)

12%b

0.50

35

561

 

Ovendry

0.53

NA

NA

 

aData for green and 12% conditions taken from reference (98); ovendry data from reference (59).

bData from reference (59).

Mechanical properties

 

 

 

Property        Green

Dry

 

Magnolia acuminata (cucumbertree)a

MOE        1.56 × 106 lbf/in2        10.756 GPa

MOR        7.40 × 103 lbf/in2        51 .023 MPa

C| |        3.14 × 103 lbf/in2        21.650 MPa

C ⊥        0.33 × 103 lbf/in2        2.275 MPa

1.82 × 106 lbf/in2 12.3 × 103 lbf/in2 6.31 × 103 lbf/in2 0.57 × 103 lbf/in2

12.549 GPa 84.809 MPa 43.507 MPa 3.930 MPa

WML

10.0 in-lbf/in3

68.950 kJ/m3

12.2 in-lbf/in3

84.119 kJ/m3

Hardness

520 lbf

2312.96 N

700 lbf

3113.60 N

Shear| |

0.99 × 103 lbf/in2

6.826 MPa

1.34 × 103 lbf/in2

9.239 MPa

Magnolia grandiflora (Southern magnolia)a

 

 

MOE

1.11 × 106 lbf/in2

7.653 GPa

1.40 × 106 lbf/in2

9.653 GPa

MOR

6.80 × 103 lbf/in2

46.886 MPa

11.2 × 103 lbf/in2

77.224 MPa

C| |

2.70 × 103 lbf/in2

18.617 MPa

5.46 × 103 lbf/in2

37.647 MPa

C

0.46 × 103 lbf/in2

3.172 MPa

0.86 × 103 lbf/in2

5.930 MPa

WML

15.4 in-lbf/in3

106.183 kJ/m3

12.8 in-lbf/in3

88.256 kJ/m3

Hardness

740 lbf

3,291.52 N

1,020 lbf

4,536.96 N

Shear| |

1.04 × 103 lbf/in2

7.171 MPa

1.53 × 103 lbf/in2

10.549 MPa

Magnolia virginiana (sweetbay)b

 

 

 

MOE

NA

NA

1.64 × 106 lbf/in2

11.308 GPa

MOR

NA

NA

10.9 × 103 lbf/in2

75.293 MPa

C| |

NA

NA

5.68 × 103 lbf/in2

39.164 MPa

C

NA

NA

0.56 × 103 lbf/in2

3.861 MPa

WML

NA

NA

NA

NA

Hardness

NA

NA

NA

NA

Shear| |

NA

NA

1.68 × 1 03 lbf/in2

11.583 MPa

 

aReference (98).
bReference (90).

 

Drying and shrinkage

 

 

 

 

Percentage of shrinkage
(green to final moisture content)

Type of shrinkage

0% MCa

6% MCb

20% MCb

Tangential

 

 

 

Magnolia acuminata (cucumbertree)

8.8

7.0

2.9

Magnolia grandiflora (southern magnolia)

6.6

5.3

2.2

Magnolia virginiana (sweetbay)

8.3

NA

NA

Radial

 

 

 

Magnolia acuminata (cucumbertree)

5.2

4.2

1.7

Magnolia grandiflora (southern magnolia)

5.4

4.3

1.8

Magnolia virginiana (sweetbay)

4.7

NA

NA

Volumetric

 

 

 

Magnolia acuminata (cucumbertree)

13.6

10.9

4.5

Magnolia grandiflora (southern magnolia)

12.3

9.8

4.1

Magnolia virginiana (sweetbay)

12.9

NA

NA

aReference (98).

 

 

 

bReference (90).

 

 

 

Kiln drying schedulea

 

 

 

4/4, 5/4, 6/4        8/4        10/4        12/4        16/4

Condition        stock        stock        stock        stock        stock

Standard        T10-D4        T8-D3        NA        NA        NA

aReferences (6, 86) for Magnolia grandiflora (southern magnolia) and Magnolia virginiana (sweetbay).

Working Properties: Magnolia has average nail-holding ability, is readily worked, and glues, paints, and finishes well.

Durability: Rated as slightly or nonresistant to heartwood decay. Preservation: No information available at this time.

Uses: Lumber, veneer, furniture (upholstery frames), boxes, interior trim, cabinetry, doors, slats for venetian blinds, plywood.

Toxicity: The bark and leaves can be irritating (64), while the wood has been reported to cause bronchial asthma and rhinitis (40).

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