Overall, only 2.1% of the pine trees' rings and 1.3% of the juniper shrubs' rings were blue; the cells which hadn't lignified properly were mainly found at the end of growth rings, in latewood.

These needles are typically between two and four inches long and are blue green in color. Needles remain on the tree for two to three years before dropping in the fall. ... Eastern white pine trees ...

The study revealed that blue rings were more common in pine trees than in junipers, appearing in 2.1 percent of the trees' rings compared to 1.3 percent in shrubs.

Swiss Stone Pine keeps its lower branches longer than other pines, becoming more open and picturesque at maturity.

What: Podocarpus lawrencei Blue Gem, or Blue Mountain Plum-Pine, is a colorful, easy-to-grow selection from Tasmania. In spring, the new growth is a bright blue-green that deepens in tone as the ...

This week, we meet the scotch pine, or Pinus sylvestris, which is not native to Indiana, but has been widely planted in the state for Christmas tree production. This conifer, also known as Scots pine, ...