A COMPLETE ANGIOSPERM FLOWER

FLOWER PARTS OCCUR IN WHORLS IN THE FOLLOWING ORDER- SEPALS, PETALS, STAMENS, PISTILS

PEDICEL - flower stem

RECEPTACLE - base of flower where other parts attach

SEPALS - small and green, collectively called the CALYX

PETALS - often large and showy, collectively called the COROLLA

PERIANTH - CALYX + COROLLA

STAMEN - composed of filament and anther

ANTHER - structure containing pollen grains

FILAMENT - structure connecting anther to receptacle

ANDROECIUM - collective term for stamens

CARPEL - structure enclosing ovules

PLACENTA - place of attachment of ovule(s) within ovary

STIGMA - receptive surface for pollen

STYLE - structure connecting ovary and stigma

OVARY - basal postion of pistil where ovules are located

The ovary develops into the fruit and contains ovules (eggs) which develop into seeds after fertilization.

LOCULE/CELL - chamber containg ovules

PISTIL - Collective term for carpel(s)

THE TERMS CARPEL AND PISTIL ARE EQUIVALENT WHEN THERE IS NO FUSION, IF FUSION OCCURS THEN YOU HAVE 2 OR MORE CARPELS UNITED INTO ONE PISTIL.

GYNOECIUM - collective term for pistils, a gynoecium can be composed of:

1. A single carpel = simple pistil

2. Two or more fused carpels = compound pistil

3. Two or more unfused carpels = two or more simple pistils

To determine the number of carpels in a compound pistil, count the locules, points of placentation, styles, stigma lobes, and ovary lobes.

COMPLETE FLOWER - A flower having all four whorls

PERFECT FLOWER - A flower having both sexes

UNISEXUAL FLOWER - A flower having one sex

MONOECIOUS PLANTS - A plant with unisexual flowers with both sexes on the same plant

DIOECIOUS PLANTS - A plant with unisexual flowers with one sex on each plant, in effect, male and female plants