Transcript Lesson 03B What`s your Classification? PPT

What’s Your Classification?
Horticulture Science 03B
Plant Life Cycles
Growth Forms
Size Classification
The Big Picture
1. Define plant life cycle.
2. Compare annual, biennial and perennial
life cycles
3. Compare woody and herbaceous plants.
4. Define types of growth habit
classifications
LIFE CYCLE is the amount of time it takes for the plant to go from a
germinating seed until the resulting plant produces another seed.
*Seed to seed*
ANNUAL plant completes a life cycle
in one growing season.
Grows during vegetative stage
Produces flowers
Produces seeds
Dies
ALL IN ONE GROWING SEASON
Examples: petunias, lettuce, pansy,
marigold, snap beans
Some annuals are known as summer annuals. They mature and produce seed in
the warmer months of the year. Others are know as winter annuals. They thrive
in cooler weather producing seeds the next spring.
BIENNIAL plants that complete their life
cycle in two years or growing
seasons
1st year – seed to vegetative
growth then go dormant
2nd year – continue to grow,
flower and produce seed
Die
Examples: carrots, cabbage,
beets, onion, hollyhock
https://upload.wikimedia.org/wikipedia/commons/3/34/Two_colors_of_onions.jpg
PERENNIAL life cycle lasts longer than 2
years.
Herbaceous perennials have
shoots that may die back to the
ground in the fall. Roots survive
the winter and the plant returns
in the spring. It has no woody
tissue.
Woody perennials don’t die back
but continue growing each year.
They have woody tissue.
Example: trees, shrubs and grasses
Trees and shrubs that lose all
their leaves in the fall are
deciduous.
Trees and shrubs that retain their
leaves with some shedding
periodically are evergreen.
Growth Habit Classification
Vine - a climbing or trailing herbaceous or woody
plant
Trees - having a single central trunk with a mature
height over 12 feet
Shrub - having several trunks with mature height of
less than 12 feet