










You are probably already aware of this Division; they are commonly called “conifers”,“evergreens” or "narrowleaf evergreens". This Division includes many types of plants such as pines, cedar, redwood, juniper, cypress and yew trees to name a few.
Characteristics of the division include:
1. leaves that are needle-like, linear, awl-like or scale-like
2. There is no flower. The reproductive structure that
is comparable to a flower (producing
the male pollen and female egg) is a cone. There are male cones
and female cones. Some
conifers have male and female cones on the same individual tree
while other species have
plants with only male or female cones.
In some cases, this can have horticultural
significance. The Hollywood juniper is a female
cultivated variety of the Chinese juniper. Because it is a female
plant, it doesn't produce
any pollen (only male cones produce pollen). Many people are allergic
to juniper pollen,
so the female Hollywood juniper is an "allergy free" plant.
STUDENT RESEARCH QUESTIONS:
2. Give three examples of trees in the Division Coniferophyta not listed above.
3. Do an internet search ("yew leaf image"). Which of the four leaf
shapes illustrated above
fits for the yew? Please include the URL with your answer
(cut and paste).
4. What is the name of the structure enclosing the seed in yew trees?
5. What is a "closed cone pine"? Give an example of a closed cone pine
that grows in
California.
6. Name a deciduous evergreen (try search: deciduous
coniferophyta)
Division Coniferophyta - the conifers