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Most conifers are monoecious, but some are subdioecious or dioecious; all are wind-pollinated. Conifer seeds develop inside a protective cone called a strobilus. The cones take from four months to three years to reach maturity, and vary in size from 2 to 600 millimetres (1 ⁄ 8 to 23 + 5 ⁄ 8 in) long.
Abies grandis is a large evergreen conifer growing to 40–70 metres (130–230 feet) tall, exceptionally 100 m (330 ft), with a trunk diameter of up to 2 m (6 + 1 ⁄ 2 ft). The dead tree tops sometimes fork into new growth. [4]
It is a very large evergreen tree (the tallest in New Guinea, and the tallest species in its family), growing to 50–80 metres (164–262 ft) tall, exceptionally to 90 m (295 ft), with a trunk up to 3 m (10 ft) diameter. The branches are horizontal, produced in whorls of five or six.
In 1925, a firm of commercial nurserymen specialising in conifers were looking for a breed that was fast-growing, and could be deployed in barren, windy and salty areas such as Cornwall. Eventually they found the six original trees developed by Leyland, and began propagating the species. [ 20 ]
The white spruce is a large evergreen conifer which normally grows to 15 to 30 metres (50 to 100 ft) tall, but can grow up to 41 m (133 ft) tall [9] with a trunk diameter of up to 1 m (3 ft 3 in). The bark is thin and scaly, flaking off in small circular plates 5 to 10 centimetres (2 to 4 in) across. The crown is narrow – conical in young ...
The largest individual, near Nova Petrópolis, Rio Grande do Sul state, Brazil is 45 m or 147.7 ft in height with a diameter at breast height of 3.8 m or 12.5 ft girth. [3] The tree is fast growing; as much as 113 centimetres (3 + 1 ⁄ 2 ft) a year (16 m or 52 ft in 14 years) at Puerto Piray, Misiones Province, Argentina.
One of the slowest-growing conifers. Many of the trees are wider than they are tall. ... with a relatively fast growth rate. Uses: timber; landscaping, posts ...
Rimu is a coniferous tree with dark red wood that reaches a height of 35–60 m (115–197 ft), with a trunk 1.5–2 m (4.9–6.6 ft) in diameter. The bark is flaky and dark-brown in colour.