[Plant Science Notes]

Plant Diversity

A flower of a mariposa lily, which is a typical member of the Angiospermophytes.

Be able to outline the structural differences and similarities of the following 4 plant groups:

  Structure of Roots, Stems & Leaves Height Reproduction
Bryophytes (Mosses) Never have roots, but have special roothairs called rhizoids. Simple leaves and stems are non-vascular. up to 1/2 meter tall. Spores produced in a capsule at the end of a stalk.
Filicinophytes (Ferns) All have vascular roots, leaves & non-woody stems. up to 15 meters tall. Spores produced in sporangia on the underside of the leaves.
Coniferophytes (Conifers) All are trees or shrubs with woody, vascular tissues. Leaves often narrow with a thick waxy cuticle. up to 100 meters tall.

Seeds produced from ovules on cone scales of female cones.

Male cones produce pollen.

Angiospermophytes (Flowering Plants) Typically have roots, leaves & stems, all with vascular tissue. Some stems are herbaceous, others woody. up to 100 meters tall. Seeds produced from ovules within ovaries. Ovaries are female part of flowers. Ovaries develop into fruits to help disperse seeds.

Western juniper, an example of a coniferophyte, which reproduces using small woody cones.


Maidenhair Fern: Adiantum aleuticum var. aleuticum

A maidenhair fern, which is a typical member of the filicinophytes which reproduce using small spore sacs known as sporangia.


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