One of three species of Redwood TreesCoast Redwood (Sequoia sempervirens)Dawn Redwood (Metasequoiaglyptostroboides)
Taxonomy • Kingdom – Plantae (Plants0 • Phylum – Pinophyta (Conifer – needle bearing) • Class – Pinopsida (Coniger – evergreen needle) • Order – Pinales (cone bearing evergreens) • Family – Cupressaceae (Cypress family- flat needles) • Subfamily – Sequoioideae (Redwood subfamily) • Genus Sequoiadendron (giant sequoia family) • Species – S. giganteum
Description;Worlds largest single trees by volume.Grow to an average height of 160-279 feet
They can be 20 to 26 feet in diameter.Record trees have been measured at 311 feet high and 56 feet in diameter.
The bark is fibrous, furrowed, and may be 3 feet thick. It provides protection from fire.
The leaves are evergreen, awl-shaped, 3-6 mm long and arranged spirally on the stems.
The seed cones are 4-7 cm long (1.6 to 2.8 inches) and mature in 18-20 months.They typically remain closed for years.
They reproduce by seed. A large tree can disperse up to 300,000 to 400,000 seeds/year.Fire opens cones and allows for seeds to be rapidly dispersed.
They occur in scattered groves, with a total of 68 groves.They like a humid climate with a dry summer and snowy winters.They prefer to grow at altitudes of 5,660 to 7,050 feet
Because of fire suppression the trees are having a hard time reproducing and are currently declining in numbers.
The tree is widely planted in Europe, NewZealand and western north america. It has a harder time in the eastern united states.
Bibliography • En.wikipedia.org/wiki/Sequioadendron_giganteum • www.fs.usda.gov.sdquoia.gov. • Library.thinkquest.org/J002415 • Eol.org/pages/323361/details • www.arkive.org> Species > Plants and algae