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They are vascular seed bearing plants that can grow as shrubs, trees, or vines There are about 70...

Date post: 15-Jan-2016
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Page 1: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.
Page 2: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

They are vascular seed bearing plants that can grow as shrubs, trees, or vines

There are about 70 present day species of gnetophytes that are known placed in just three genera

Gnetophytes fall under the phylum of Gymnosperms which are ancient surviving seed plants

Page 3: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Gymnosperms are the most ancient seed plants

There are four groups of gymnosperms that are found today

They include gnetophytes, cycads, ginkgoes, and conifers.

All these plants reproduce with seeds that are exposed

Gymnosperms are also known as cone bearers and it means “naked seed”

Page 4: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

In Flowering plants the fruit or ovary wall covers the seeds, in gymnosperms the seeds are not covered in anything similar to that, that is why they call it naked seeds.

These plants are fruitless and they do not produce flowers.

THEY DOO HAVEE SEEDDS!!!

Page 5: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Ancestors of seed plants evolved to survive in many places other plants couldn’t

The oldest plants included ferns and moss

These ferns and mosses evolved into plants with seeds during the Carboniferous and Devonian periods which were 300-400 million years ago

Page 6: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

There are three different types of gnetophytes on earth

They all are very simmilar but have their differences and are used for very unique and benificial reasons

The three types are 1.Ephedra2. Gnetums 3. Welwitschia

Page 7: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Epherda are mostly found in dry climates mainly in the norther hemisphere, across south Europe, north Africa and central asia and mainly plant grows where it can get direct sunlight. example : deserts

Epherda is very beneficial for medical purposes because it is used to treat asthma, hay fever, and the common cold.

Page 8: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

The Chinese used this plant to cure symptoms of the common cold

American settlers used it as tea called Mormon tea, and Squaw tea.

Ephedra is still even used today in most over the counter medicine and in fat burning medicine

These plants are mostly shrubby, with small scale leaves and jointed scales

Page 9: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Gnetums is a type of gnetophyte that are tropical evergreen trees, shrubs and lianas.

Gnetums are very odd when being compared to Gnetophytes because they produce brad leaves with netted venation that are very simmilar to the ones found in flowering plants

These Gnetums are found in South America, Africa and most parts of China

Page 10: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Gnetums are mainly edible therefore you can eat its seeds when there roasted and is used as a leaf vegetable, some are used as herbal medicine

Gnetums are very special compared to other gymnosperms because they have high photosynthetic and transpiration capabilities with also a high capacity of xylem.

Page 11: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Welwitschia grows from a short, thick, woody trunk with only two leaves that continuously grow from their base, and long thick taproot.

These plants grow very slow and are endangered, but despite being endangered, they live around for a long time.

Page 12: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

These plants start of with two leaves and they grow and end up looking like if it had multiple leaves.

They are mostly found in South Africa and has male and female cones. They can live for almost one thousand years

Page 13: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

Most Gnetophytes are located in the desert or mountain in Asia, Africa, South America, and in the deserts of North America

They need to be exposed to constent sunlight this is why you might find them in deserts

Page 14: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

All of these plants reproduce with seeds that are exposed.

The reproductive scales of these plants are cluisterd into cones

Most gnetophytes produce separate female and male cones born on separate male or female plants

Page 15: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.
Page 16: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.
Page 17: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.
Page 18: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.
Page 19: They are vascular seed bearing plants that can grow as shrubs, trees, or vines  There are about 70 present day species of gnetophytes that are known.

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