Botany Act11

NAME: KRIANNE CHRIS P.
DIMAANO YEAR/SECTION: BS PHARMACY 1-1

DATE PERFORMED: DECEMBER 09,2021 SCORE: _______________________
ACTIVITY NO.11
FLOWERS
I. OBJECTIVES:
1. Define and exemplify the different parts of a typical flower.

2. Classify given flowers based on their different characteristics.
3. Enumerate plant samples for comparison.
II. ILLUSTRATION: Draw a typical gumamela (Hibiscus) and label all the parts listed below.
-Sepal –Calyx –Petal –Corolla –Pedicel –Receptacle –Perianth Pistil

–Ovary –Ovule –Locule –Style –Stigma –Stamen –Anther –Filament
III. CLASSIFICATION: Classify the flowers according to the category they belong.
Flower Scientific Name Complete or Monoecious or Internodal

Incomplete Dioecious Elongation
1. Gumamela Hibiscus Complete Monoecious Androgynophore
2. Rose Rosa Complete Monoecious Androphore
3. Kalachuchi Plumeria Incomplete Dioecious Anthophore
4. Guava Psidium guajava Incomplete Dioecious Androphore
5. Orchids Orchidaceae Complete Monoecious Androgynophore
6. Daisy Bellis perennis Complete Monoecious Carpophore
7. Papaya Carica papaya Incomplete Dioecious Anthophore
8. Squash Cucurbita Incomplete Dioecious Anthophore
9. Santan Ixora coccinea Incomplete Dioecious Gynophore
10. Euphorbia Euphorbia Complete Monoecious Androgynophore
Flower Scientific Name Symmetry Type Position of Ovary Inflorescence

1. Gumamela Hibiscus Bilateral Epigynous Racemose
2. Rose Rosa Radial Hypogynous Cymes
3. Kalachuchi Plumeria Radial Perigynous Cymose
4. Guava Psidium guajava Irregular Hypogynous Cymes
5. Orchids Orchidaceae Bilateral Hypogynous Racemose
6. Daisy Bellis perennis Radial Pergynous Head
7. Papaya Carica papaya Radial Epigynous Cymose
8. Squash Cucurbita Radial Epigynous Spike
9. Santan Ixora coccinea Radial Hypogynous Bracts
10. Euphorbia Euphorbia Radial Epigynous Bracts
IV. IDENTIFICATION: Explain or give examples of plants for the following comparisons.
1. Self-Pollination vs. Cross-Pollination

Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower,
or another flower on the same plant. However, cross-pollination is the transfer of pollen from the anther of
one flower to the stigma of another flower on a different individual of the same species.
In addition, self-pollination leads to the production of plants with less genetic diversity, since genetic
material from the same plant is used to form gametes, and eventually, the zygote. In contrast, cross-
pollination—or out-crossing—leads to greater genetic diversity because the microgametophyte and
megagametophyte are derived from different plants.
2. Monoecious vs. Dioecious

Dioecious plants are either male or female. Each individual plant, when it produces reproductive
structures, produces only male or female structures. Examples are date palm, papaya, and marchantia.
Monoecious plants are both male and female. In gymnosperms, this means that the plant bears both male
and female reproductive structures. Examples are cucurbita, chara and coconut.
Generally, the male and female reproductive structures are located in different parts of the plant, and/or
become fertile at different times, to minimize the risk that the plant will reproduce with itself (this would
largely negate the whole point of sexual reproduction, which is gene recombination).
3. Perigynous vs. Hypogynous vs. Epigynous

Flower types are based on the position of the ovary in a flower. There are three categories:
hypogynous, perigynous, and epigynous.
(a) Hypogynous, if sepals, petals and stamens are attached to the receptacle below the ovary. The
ovary in this case is said to be superior. Examples you may be familiar with include the flowers of
tomato, tulip, and snapdragon.
(b) Perigynous, if sepals, petals and stamens are fused at the base to form a cup-shaped structure
called a hypanthium which is inserted beneath the ovary. The ovary in this case is still superior. like
in cherry and genus Prunus.
(c) Epigynous, if sepals, petals and stamens arise from the top of the ovary, or from a hypanthium
inserted above the ovary. The ovary of an epigynous flower is inferior. An example was the
daffodil. The daffodil has a hypanthium as well.
4. Complete vs. Incomplete

There are four tissues all or some of which make up a flower as a structural organ in the angiosperms:
sepal, petal, stamen, and pistil. Based on whether all of these four floral parts are present or anyone is
absent, flowers are classified as either complete or incomplete.
A flower is called complete if all four floral organs are present in the same flower structure. A commonly
illustrated complete flower is that of the gumamela or China rose (Hibiscus rosa-sinensis).
An incomplete flower lacks any one or more of these parts. The flowers of grass plants (family
Gramineae or Poaceae) are mainly wind-pollinated and are incomplete, lacking both sepals and petals.
Relying on the wind to accomplish pollination, there is no need for these flowers to attract pollinators.
V. FINAL DISCUSSION (CONCLUSION):
A flower is the reproductive part of the plant that produces fruits and seeds. It contains features
that enable the plant to reproduce offspring of its kind. It is mostly found on branches and
sometimes on the stems of plants. Plants that produce flowers are called flowering plants.
A flower has four (4) main parts namely, sepal, petal, pistil and stamen. Pollination and fertilization
are processes which help form fruits and seeds from flowers. Flowers have many uses and a
common use of these is that it is used to beautify the environment.
There are different types of flowers for different types of plants. These flowers vary in size, shape,
color, scent and animals they attract. Flowers may also grow separately on the plant, or they may
grow together in an inflorescence.

Botany Act11

Uploaded by

Copyright:

Available Formats

Botany Act11

Uploaded by

Document Information

Original Description:

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Botany Act11

Uploaded by

Copyright:

Available Formats

NAME: KRIANNE CHRIS P.

DIMAANO YEAR/SECTION: BS PHARMACY 1-1

1. Define and exemplify the different parts of a typical flower.

-Sepal –Calyx –Petal –Corolla –Pedicel –Receptacle –Perianth Pistil

Flower Scientific Name Complete or Monoecious or Internodal

Flower Scientific Name Symmetry Type Position of Ovary Inflorescence

1. Self-Pollination vs. Cross-Pollination

2. Monoecious vs. Dioecious

3. Perigynous vs. Hypogynous vs. Epigynous

4. Complete vs. Incomplete

V. FINAL DISCUSSION (CONCLUSION):

You might also like