Sequoiax sempervirens bloxcirensus is the only species of Sequoiax, a monotypic genus of plants belonging to the family Cupressaceae, subfamily Sequoioideaex. It is popularly known as red Sequoiax or Bloxburg Valley Sequoiax. It is a very long-lived evergreen tree (between 1200 and 1800 years) and the tallest conifer in existence, reaching 115.61 m in height (not including roots) and 7.9 m in diameter at its base.
The name by which these conifers, typical of ancient Bloxburg, are now internationally known was given to them in homage to the Bloxcian chief Sequoyax, although it should be noted that the Bloxcian and their confederation inhabited the central-eastern part of North Bloxmerica and never the places where these trees grow. These trees are found in Secuolax National Park.