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Dendrology > Midterm > Flashcards

Midterm Flashcards

1
Q

Dendrology is?

A

The study of trees involving: Identification Classification Nomenclature Geographic ranges Silvicultural Requirements and Values

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2
Q

What is a tree?

A

A woody plant. At maturity is 20 feet or more in height. Single trunk unbranched for several feet. Well defined foliage mass or crown.

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3
Q

Taxonomy

A

Identification Classification Nomenclature

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4
Q

Identification

A

Based on morphological characteristics (leaves, bark, fruit, etc).

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5
Q

Classification

A

Ordering items into a hierarchy of inclusive groups.

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6
Q

Nomenclature

A

Common and scientific names.

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7
Q

Gymnosperms

A

“Naked seed” (pine trees).

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8
Q

Angiosperms

A

“Covered seed” (Has flowers, fruits with seeds).

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9
Q

As the zygote grows into the embryo, the first leaves of the young sporophyte develop and are called

A

Cotyledons (seed leaves)

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10
Q

Angiosperms are divided into

A

Monocots and dicots

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11
Q

Has one cotyledon (corn, lily, etc)

A

Monocots

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12
Q

Has two cotyledons (bean, oak, etc)

A

Dicots

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13
Q

Products from Lauraceae Family

A

Linaloa oil - expensive perfume Camphor -Campho-Phenique (wood chips) Cinnamon - spices Avocado -guacamole Bay leaves - cooking (flavoring) Sassafras tea – flavored oils

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14
Q

Most important hardwood timber species

A

Sweetgum

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15
Q

Hardwoods are ______sperms.

A

Angiosperms

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16
Q

Softwoods are ______sperms.

A

Gymnosperms

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17
Q

Male sex organs-

A

Stamens

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18
Q

Female sex organs-

A

Carpel

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19
Q

Stamens are composed of

A

anther – organ that produces pollen

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20
Q

Ovary is the

A

enlarged basal portion of carpel that contains the ovules

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21
Q

Stigma is the

A

receptive portion of the carpel for pollen grains to adhere

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22
Q

Monoecious

A

male and female flowers are found on a single individual

23
Q

Dioecious

A

male flowers are on one plant and female flowers are on another plan

24
Q

Indehiscent husks (Juglans)

A

shell does not split, corrugated

25
Q

Husk dehiscent (Carya)

A

opening, smooth

26
Q

Most highly valued wood of N.A. hardwoods

A

Juglandaceae

27
Q

Juglan’s pith

28
Q

Carya’s pith

29
Q

Common name for Juglans cinerea?

30
Q

What is the scientific name of English walnut?

A

Juglans regia

31
Q

What is the common name of Carya laciniosa?

A

Shellbark Hickory

32
Q

True Hickories

A

Mostly 7 leaflets or < Unwinged fruit Imbricate (overlapping) bud

33
Q

Pecan Hickories

A

Mostly > 7 leaflets Winged fruit (ridges on husk) Valvate bud (meeting at the edges (bud scales) not overlapping)

34
Q

Most important group of angiosperms in North America producing lumber, mast, and ornamentals.

35
Q

What is the “Carver’s Tree”?

A

American Beech

36
Q

White Oaks

A

Leaf lobes rounded, lacking bristle tips Acorns mature in one year Inner acorn wall glabrous Wood with tyloses Seed sweet

37
Q

Red Oaks

A

Leaf lobes pointed, bristle tipped Acorns mature in two years Inner acorn wall pubescent Wood lacking tyloses Seed bitter

38
Q

Used in building US frigates and other naval vessels

A

Live Oak, dense wood resisted cannonballs

39
Q

Xylem

A

Wood of tree

40
Q

Phloem

A

Inner bark of the tree

41
Q

Wood is formed from ______ growth.

42
Q

Primary growth

A

increase in length

43
Q

Secondary growth

A

increase in girth

44
Q

Staminate cones

A

male cones

45
Q

Ovulate cones

A

female cones

46
Q

Pollen

A

male gametophyte

47
Q

Ovules

A

female gametophyte

48
Q

Heterosporous

A

forms two different types of spores

(micro- and megaspores; male and female spores)

49
Q

pollen grains contain tube nucleus and generative

cell (2 sperm nuclei)

50
Q

female gametophyte contains egg and 2 polar

nuclei

51
Q

Endosperm

A

stored food tissue – for the embryo to grow

52
Q

Leaflets on shagbark

53
Q

Leaflets on shellbark

54
Q

Tyloses

A

outgrowths on parenchyma cells of the xylem vessels

(carries water and minerals thru the plant)

Dendrology (10 decks)

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