Angiosperms Lab

Flower anatomy

Petal is a unit of the

corrola

Sepal is the unit of the

calyx

Purpose of pistil/ carpels

◦the female reproductive structure of a flower composed of a stigma, style, ovary, and ovule

Purpose of stamen

the male reproductive structure of a flower, consisting of a filament and a anther, in which the pollen grains develop

Complete flower

flowers that contain sepals, petals, stamen, and pistils (carpels)

incomplete flowers

flowers that are missing one or more parts of a complete flower

Perfect flowers

flowers that contain stamen and pistils (carpels)

imperfect flowers

flowers that are missing either pistils (carpels) or stamen

Angiosperms are

heterosporous

Monocot characteristics

◦flower parts are in multiples of three

◦leaves with parallel veins

◦the embryo has one cotyledon

–cotyledon: embryonic seed leaves

◦stem is a atactostele

–atactostele: vascular tissue (xylem and phloem) is scattered throughout the stem

◦only primary growth no true secondary growth

◦fibrous root system

Dicot characteristics

◦leaves with net-like veins

◦flower parts in multiples of four or five

◦two cotyledons in the embryo

◦stem is a eustele

–eustele: vascular bundles are arranged in a ring around the stem

◦many with secondary growth

◦tap root usually present

lily anther pollen tetrads

Lily anther pollen tetrads labeled

lily ovulatory mature female gametophyte

label lily ovulatory mature female gametophyte

Angiosperms belong to phylum

anthophyta