Ch. 8 Flowers, Fruits, and Seeds Flashcards
Name the categories of plants
annual plants, biennial, pernnial
annual plants
cycle complete in single seasons
Biennial plants
completed in 2 growing seasons
Perennial plants
cycle takes several to many growing seasons or plant produces flowers on new growth, while other plant parts persist indefinitely
Plant Cycle
from seed germination to mature plants producing seeds
Two major groups of flowering plants
dicots and monocots
Dicot flowering plants
- Most flowering trees
- Three-fourths of all flowering plants
- shrubs
Monocot flowering plants
- Species that produce bulbs
- Parallel leaf veins
Compare and Contrast Dicot and Monocot flowering plants
image 8.1 in book
Describe structures of flowers
o Flowers begin as embryonic primordium that develops into a bud
o Flowers occur as specialized branches at tips of peduncles
May have branchlets of pedicels (stalk of single flower)
includes receptacle, sepals, petal, stamens, pistil, ovary
Receptacle
swollen end of peduncle or pedicel
Other parts of flower attached to receptacle in whorls: Sepals, petals, stamens and pistil
Sepals
outermost whorl
Collectively referred to as calyx
Protects flower while in bud
Petal
next whorl inside sepals
Collectively referred to as corolla
Showy corollas attract pollinators
Inconspicuous or missing corolla sin many trees, weeds, grasses, and wind-pollinated plants
Perianth
formed by calyx and corolla
Stamens
o Stamens attached around base of pistil
Each stamen consist of filament with anther at top
Pollen grains developed in anthers
Pistil
consists of stigma style and ovary
Ovary develops into fruit
Ovaries
o Evolved from carpels with margins rolled inward
Carpel: lead with ovules on margins
* Carpels may be fused together into compound ovary
* Pistil can consist of one to several carpels
Superior ovary
calyx and corolla attached to receptacle at base of ovary
Inferior ovary
recpectable grows up and around the ovary
Calyx and corolla appear attached at top of ovary
What do ovaries contain?
ovules, ovules develop into seeds after fertilization
Inflorescene
o Flowers can be produced singly or in a group , attached to mean branch called peduncle
panicle, raceme, simple umbel, catkin, spike, corymb, compound umbel, head