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A mature female big-cone pine (Pinus coulteri) cone, the heaviest pine cone A young female cone on a Norway spruce (Picea abies) Immature male cones of Swiss pine (Pinus cembra) A conifer cone, or in formal botanical usage a strobilus, pl.: strobili, is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads.
Longleaf pine takes 100 to 150 years to become full size and may live to be 500 years old. When young, they grow a long taproot , which usually is 2–3 metres ( 6 + 1 ⁄ 2 –10 feet) long; by maturity, they have a wide spreading lateral root system with several deep 'sinker' roots.
Cedrus atlantica foliage and mature female cone Male cones beginning to shed pollen. Fully grown, Atlas cedar is a large coniferous evergreen tree, 30 to 35 m (98 to 115 ft) (rarely 40 m) tall, with a trunk diameter of 1.5 to 2 m (4.9 to 6.6 ft).
The trees are mostly dioecious, with male and female cones found on separate trees, [4] though occasional individuals are monoecious or change sex with time. [5] The female cones, usually high on the top of the tree, are globose , and vary in size among species from 7 to 25 centimetres (3 to 10 in) in diameter.
It is usually dioecious, with the male and female cones on separate trees, though occasional individuals bear cones of both sexes. The male (pollen) cones are oblong and cucumber-shaped, 4 cm ( 1 + 1 ⁄ 2 in) long at first, expanding to 8–12 cm (3– 4 + 1 ⁄ 2 in) long by 5–6 cm (2– 2 + 1 ⁄ 2 in) broad at pollen release.
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Table Mountain pine typically has long, thick limbs on much of the trunk even in closed canopy stands. [7] Male cones are 1.5 centimetres (0.59 in) long. Female cones are sessile and range from 4.2 to 10 centimetres (1.7 to 3.9 in) long. [7] Cone scales are tough and armed with broad, upwardly curving spines. [6]