Seed plants are " spermatophytes , " intend that they raise source , the basis for the reproduction and growing capabilities of the plant life humans and animals look upon most . Production of food for thought and the instinctive plant - rich landscape of the world are a result of cum plants . From modest flowering plants to large conifers like pine trees , seed plant life make up a significant part of the Earth ’s ecosystem .

Pines

Pine trees ( Pinus metal money ) are cone-bearing plants that produce seed and expose a all-embracing mixture of characteristics . pine tree tree exhibit acerate leaf - similar leaves in colors of juicy - green , green and gray green with fine to coarse texture . pine also evolve pinecones , the brown to purple - hue yield of the tree that grow up to 10 inches in length . Pine trees flourish in full sun exposure and need moist , well - drained soil . Once give , pines reach a top of 4 to 100 foot , depending upon the variety , according to the Clemson University Extension .

Magnolias

Magnolias ( Magnolia coinage ) are plants that actually display their seeds in the center of the flower . Magnolia flowers appear in varying nicety of whites , pick , purpleness and pinks with deciduous , semi - evergreen or evergreen foliage . Blossoms often emit a pleasing fragrance . When grown from source , ontogenesis is irregular ; a tree diagram may bloom within a time full stop of anywhere from three to 20 days , according to the Clemson University Extension . Thriving in full sunshine to fond shade , magnolias prefer rich , well - drained soil with a pH of 5.0 to 6.5 . Depending on the diversity , magnolia trees reach a height of up to 80 feet with a spread of up to 60 feet . Magnolia flush produce to a diameter of 12 column inch .

Redwoods

Redwood trees , also name coast redwoods ( Sequoia sempervirens ) , are considered the tallest trees in the world , according to the University of Florida IFAS Extension . These seed plants are treasure for their extreme tiptop as well as their visually pleasing bark that becomes bright orangish on well - established tree . Pyramidal in shape , redwoods exhibit bare , needle - like immature leaves and small cone that reach up to an inch in duration . thrive in full sunlight to partial shade , redwoods making love wet and raise in a assortment of grime types , include soaked sites , and are often found near stream . redwood reach a tower tallness of 60 to 120 feet with a spread of 25 to 35 feet .

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