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Bot Lec > Morphoanatomy of Leaves > Flashcards

Morphoanatomy of Leaves Flashcards

1
Q

any of the principal appendages of a vascular plant stem

A

leaf

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2
Q

usually borne laterally above ground and specialized for photosynthesis

A

leaf

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3
Q

Leaves are collectively called

A

foliage

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4
Q

Most leaves are usually green,
due to the presence of

A

chlorophyll

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5
Q

flattened portion of a leaf

A

blade/lamina

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6
Q

attaches the leaf to the stem

A

petiole/leaf stalk

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7
Q

small leaf-like growths near the base of the petiole

A

stipule

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8
Q

runs through the center of the blade and a continuation of the petiole which acts as the backbone

A

midrib

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9
Q

functions as a passage tube for liquids between the petiole and veins

A

midrib

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10
Q

acts as the framework of the leaf
and functions as a passage tube for liquids between the midrib and the blade

A

veins

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11
Q

edge of a leaf

A

margin

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12
Q

has only one leaf stalk, petiole

A

simple leaf

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13
Q

the leaf blade is completely divided, forming leaflets.

A

compound leaf

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14
Q

an extension of the petiole bearing
leaflets.

A

rachis

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15
Q

If rachis is absent, it is called

A

palmately compound (digitate)

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16
Q

if rachis is present, it is called

A

pinnately compound (pinnate)

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17
Q

The arrangement of veins and veinlets in leaves (Lamina)

A

venation

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18
Q

Main vein divided into various branches (veinlets) and form a net like structure.

A

reticulate

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19
Q

type of venation can be found in dicots

A

reticulate

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20
Q

all veins run parallel to each other and they do not form network

A

parallel

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21
Q

type of venation found in monocots

A

parallel

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22
Q

In this type of venation leaf have only one principal vein or midrib that give off many lateral veins which proceed toward margin and apex of lamina of the leaf and form
a network.

A

unicostate or pinnate in reticulate venation

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23
Q

many principal veins arising from the tip of petiole and proceed towards tip of lamina

A

multicostate or palmate in reticulate venation

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24
Q

types of multicostate venation in reticulate

A

multicostate divergent and convergent

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25
Q

Many principal veins arising from the tip of petiole, diverge from the
another toward the margin of leaf blade

A

multicostate divergent in reticulate venation

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26
Q

Many principal veins arising from the tip of petiole. At the base of leaf they are closely arranged but diverge from one another in middle part and converge towards the apex of leaf.

A

multicostate convergent in reticulate venation

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27
Q

only one principal vein that gives off
many lateral veins, which proceed toward the margin of leaf blade in a parallel manner but they do not have veinlets.

A

unicostate or pinnate in parallel venation

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28
Q

Having many principal veins arising from the tip of the petiole and proceeding upwards.

A

multicostate or palmate in parallel venation

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29
Q

types of venation included in multicostate venation in parallel venation

A

multicostate divergent
multicostate convergent
furcate venation

30
Q

Many principal veins arising from the tip of petiole and diverge toward the margin of leaf. They donot divide into veinlets and do not form network.

A

multicostate divergent

31
Q

Many principal veins arising from the tip of petiole run in a curved manner in lamina and converge towards the apex of leaf blades.

A

multicostate convergent

32
Q

The veins branch dichotomously but the reticulum is not formed by
the finer branches.

A

furcate venation

33
Q

arrangement of leaves on a stem

A

phyllotaxy

34
Q

Plants that have only one leaf per node

A

alternate or spiral

35
Q

the leaves alternate on each side of the stem in a flat plane

A

alternate

36
Q

the leaves are arrayed in a spiral along the stem.

A

spiral

37
Q

two leaves arise at the same point, with the leaves connecting opposite each other along the branch.

A

opposite

38
Q

Leaves that stands at right angle to next upper or lower pair

A

decussate

39
Q

Successive pairs of leaves stand directly over a pair in the same plane

A

superposed

40
Q

More than two leaves at each node

A

whorled

41
Q

occurrence of more than one type of leaves on the same plant.

A

heterophylly

42
Q

Leaves of different forms and shape occur at different period or places on the same plant

A

developmental heterophylly

43
Q

It is aquatic adaptation which is
commonly found in rooted emergent hydrophytes.

A

environmental heterophylly

44
Q

submerged leaves differ from the floating and aerial leaves

A

environmental heterophylly

45
Q

Due to habit mature leaves differ in their shape and incissions

A

habitual heterophylly

46
Q

Leaves with a stalk or petiole

A

petiolate

47
Q

A lamina without a petiole

A

sessile leaf

48
Q

Small green appendages usually
found at the base of the petiole

A

stipules

49
Q

If stipules are present in leaf it is
called

A

stipulated leaf

50
Q

if stipule is absent then leaf is
called

A

exstipulated

51
Q

a flattened leaf base (the sheath) partially or wholly clasps the
stem

A

sheathing

52
Q

leaf appears to extend down the stem from the point of attachment, as if fused to the stem

A

decurrent

53
Q

a leaf is sessile and clasps the stem for most, but not all, of its circumference

A

amplexicaul

54
Q

the leaf is sessile with the base of the blade completely surrounding the stem

A

perfoliate

55
Q

Two opposite leaves fuse basally, such that the blade bases of the fusion product completely surrounds the stem.

A

connate-perfoliate

56
Q

boundary area extending along the edge of the leaf.

A

leaf margin

57
Q

shape of the leaf tip

A

leaf apex

58
Q

lowest part of a lamina that is near the petiole

A

leaf base

59
Q

an extension of a vein

A

apical process

60
Q

trichome cover

A

vestiture

61
Q

term meaning without trichomes at all.

A

glabrous

62
Q

leaves contain 3 tissue systems

A

dermal tissue (upper and lower epidermis)
ground tissue (palisade and spongy mesophyll)
vascular tissue (xylem and phloem)

63
Q

These cells appear to be involved in
the rolling or folding inward of the leaf during drought. When water is plentiful, these cells are turgid (swollen with water) and the leaf is open.

A

bulliform cells

64
Q

forms a coil to help the plant in climbing or support of weak stem

A

tendrils

65
Q

reduced leaf that is usually modified for protection

A

bud scales

66
Q

modified leaves that surround a group of flowers to attract pollinators

A

bracts

67
Q

serve as protection to the plant and photosynthesis is carried out mainly by fleshy green stems

A

spines

68
Q

most succulents have leaves modified for storing water

A

storage leaves

69
Q

leaves of some succulents produce
adventitious plantlets which fall off the leaf and take root in the soil.

A

reproductive leaves

70
Q

function as food storage organs during dormancy

A

bulb scales

Bot Lec (10 decks)

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