An example of dia used as a prefix is in the word diagnosis, which means a thorough analysis of a disease. dia- through, throughout, across: diachronic, diagram
Blue spruce evergreen trees (Picea pungens) grow wild in Western North America in U.S. Department of Agriculture plant hardiness zones 3 through 8. This erect tree produces blue-green evergreen needles that are sharp to the touch. Blue spruces reach 30 to 65 feet tall, spreading 10 to 20 feet wide. With good care this slow-growing tree can grow up to 12 inches per year. Blue spruce trees grow well as showcase trees or as part of a windbreak. Examine the location of the blue spruce tree while it is still young enough to transplant.
The white spruce is a large coniferous evergreen tree which grows normally to 15 to 30 metres (49 to 98 ft) tall, but can grow up to 40 m (130 ft) tall with a trunk diameter of up to 1 m (3.3 ft).The bark is thin and scaly, flaking off in small circular plates 5 to 10 centimetres (2.0 to 3.9 in) across.he cones are pendulous, slender, cylindrical, 3 to 7 cm (1.2 to 2.8 in) long and 1.5 cm (0.59 in) wide when closed, opening to 2.5 cm (0.98 in) broad. They have thin, flexible scales 15 mm (0.59 in) long, with a smoothly rounded margin. They are green or reddish, maturing to pale brown 4 to 8 months after pollination.