Angiosperm Perfect Flower
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Angiosperm Perfect Flower Perfect flowers have both male (staminate) and female (pistillate) reproductive parts. Petal. Male Parts. Anther. Female Parts. Stamen . Filament. Stigma. Pistil or Carpel. Style. Ovary. Ovule. Sepal. Peduncle. To Next Page. Angiosperm Woody Stem.

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Angiosperm Perfect Flower

Perfect flowers have both male (staminate) and female (pistillate) reproductive parts

Petal

Male Parts

Anther

Female Parts

Stamen

Filament

Stigma

Pistil

or

Carpel

Style

Ovary

Ovule

Sepal

Peduncle

To Next Page


Angiosperm Woody Stem

Terminal Bud

One year’s growth

Lateral Bud

Terminal Bud Scale Scar

Bud Scale - three are visible in this drawing

Bud scales are small scale-like modified leaves that cover the bud during its winter dormancy.  When the terminal bud breaks dormancy in the spring, these bud scales are shed, leaving behind the scars where they were attached.

Leaf Scar

Vascular Bundle Traces

Pith

Lenticel

To Next Page


Leaf Arrangement

Alternate

Opposite

Whorled

Alternate – Leaves and buds are spaced in alternating fashion along the stem

Opposite – Leaves and buds are directly across from each other on the stem

Whorled – Three or more leaves and buds are present at a single node

To Next Page


Simple Leaf

Midrib

Blade

Leaf

Petiole

Stipule

Bud

Stem

KEY POINT: A leaf will ALWAYS have a bud at the base of the petiole.

If it does not have a bud, it is leaflet, not a leaf.

To Next Page


Compound Leaf

Leaflet

No Bud

Rachis

Leaflet

Petiolule

Stem

Bud

Because the bud is at the base of the rachis, not at the base of the petiolule, this diagram does not show seven simple leaves, but instead a single compound leaf comprised of seven leaflets

To Next Page


Types of Compound Leaves

Bud

Bud

Pinnately Compound

Palmately Compound

In a palmately compound leaf, each leaflet is attached to a common point on the rachis, but leaflets in a pinnately compound leaf are not.

To Practice Quiz


Practice Quiz

Name a flower part then click on the letter to see if you are correct

A

B

C

E

F

G

H

D

I

Show Male (Staminate) Parts

Show Female (Pistillate) Parts

To Practice Quiz on Twig Parts




Filament

Next Flower Part




A tube from the pollen extends through the style to each ovule to deliver the male gamete to the ovule

Style

Next Flower Part


Ovary ovule to deliver the male gamete to the ovule

Next Flower Part


Ovules develop into seeds when fertilized by pollen ovule to deliver the male gamete to the ovule

Ovule

Next Flower Part


Peduncle ovule to deliver the male gamete to the ovule

Next Flower Part


Male (Staminate) Flower Parts ovule to deliver the male gamete to the ovule

Anther

Stamen

Filament

Next Flower Part


Female (Pistillate) Flower Parts ovule to deliver the male gamete to the ovule

Flowers can have multiple pistils (also called carpels) that can be separate or fused together

Stigma

Pistil

or

Carpel

Style

Ovary

Ovule

Next Flower Part


Twig Practice Quiz ovule to deliver the male gamete to the ovule

Name a flower part then click on the letter to see if you are correct

A

I

B

C

E

F

D

G

H

To Leaf Practice Quiz


Terminal Bud ovule to deliver the male gamete to the ovule

Next Stem Part


Lateral Bud ovule to deliver the male gamete to the ovule

Next Stem Part


Next year’s terminal bud scale scar will appear here when the scale falls off

One year’s growth

Terminal Bud Scale Scar from last year’s terminal bud

Next Stem Part


Lenticels are thought to allow air into the plant interior the scale falls off

Lenticel

Next Stem Part


Bud Scale the scale falls off

(One of five visible)

Bud Scale

(One of three visible)

Next Stem Part


A leaf scar shows where the previous year’s leaf was attached to the stem

Leaf Scar

Leaf Scar

Next Stem Part


The vascular bundle traces show where the zylem entered the leaf petiole

Vascular Bundle Traces

Next Stem Part


The Pith is the central core of the stem leaf petiole

Pith

Next Stem Part


Leaf Practice Quiz leaf petiole

How many leaves are in this diagram?

Answer


Leaf Practice Quiz leaf petiole

Bud

There is only one leaf pictured here. If this diagram pictured seven simple leaves, there would be a bud at the base of every leaf. Since there is only one bud this must be a single compound leaf

Next Question


Leaf Practice Quiz leaf petiole

A

C

B

What are the names of A, B and C?

Answer


Leaf Practice Quiz leaf petiole

A. Petiole

C. Petiolule

B. Rachis

To answer this correctly you must first identify which is a simple leaf and which is a compound leaf by looking for the leaf bud.

In a simple leaf, the blade is attached to the petiole. In a compound leaf, the leaflet is attached to the petiolule. The petiolule is attached to the rachis.

Next Question


Leaf Practice Quiz leaf petiole

A

B

Which is a palmately compound leaf and which is a pinnately compound leaf?

Answer


Leaf Practice Quiz leaf petiole

A

B

A – Pinnately Compound

B – Palmately Compound

Next Question


Leaf Practice Quiz leaf petiole

A

B

C

Which leaf arrangement is opposite, alternate, and whorled?

Answer


Leaf Practice Test leaf petiole

A - Opposite

B - Whorled

C - Alternate

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