Plant Science Terms and Anatomy

Plant Science Terms and Anatomy

Horticulture I

Flowers

Horticulture I

Flowers

Flowers

Pistil

Stamen

Petal

Sepal

Recepticle

Pedicel

Stigma

Style

Ovary

Anther

Filament

Stamen: Male

Pistil: Female

FlowersExternal Parts

• Sepals-Green parts that cover and protect flower bud before it opens

• Petals-are really leaves that are modified to attract insects for flower pollination, the pretty part that we call flowers

FlowersInternal Parts

• Stamen-male part of the flower– Anther: Sac-like structure that

contains pollen & the male sex cells

– Filament: Short stalk that holds up the anther

FlowersInternal Parts

• Pistil-female part of the flower– Stigma: Sticky part on top of the

style where insects leave pollen – Style: Holds up stigma and connects

it to the ovary – Ovary: If fertilized becomes fruit (Fertilization is when pollen travels down the

style joining the sperm & the ovule)

– Ovules: The eggs or female sex cells that become seeds if fertilized

Parts of the PistilStigma

Style

Ovary

Functions of Flowers1. Produce seeds used for sexual

reproduction2. Attract insects for pollination

Pollination is the transfer of pollenfrom anther to stigma Cross Pollination is the transfer of pollen

from the stamen to the stigma of one flower to a flower on another plant

Self Pollination is the transfer of pollen to the stigma of a flower on the same plant

1. Produce fruit to protect, nourish and carry (disperse) seeds

Complete-vs-Incomplete

• Complete flowers have both male and female parts

• Incomplete flowers have only male or female parts

What do you think?!

Activity

• Dissect this Azalea flower• Locate all the the internal &

external parts of the flower • Tape all parts to a piece of paper,

then label each internal and external part