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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
It takes 18 years for the pond pine to reach full maturity. [9] The almost round cones are 5–8 cm (2– 3 + 1 ⁄ 4 in) long with small prickles on the scales. Its cones are usually serotinous, requiring fire to open. [6] The pollen cones are cylinder-shaped with a yellow, brownish color, and are up to 1.8 inches long.
The cones are symmetrical ovoid, 4–6 cm (1 + 1 ⁄ 2 – 2 + 1 ⁄ 4 in) long by 2.5 cm (1 in) broad, and purple before maturity, ripening to nut-blue and opening to 4–5 cm (1 + 1 ⁄ 2 –2 in) broad, the scales without a prickle and almost stalkless. [2] The pine grows well in sandy soils and on soils which are too poor for white pine. [5]
The cones are 6–12 cm (2 + 1 ⁄ 4 – 4 + 3 ⁄ 4 in) long and 4–4.5 cm (1 + 5 ⁄ 8 – 1 + 3 ⁄ 4 in) broad, green or purple ripening pale brown, with about 100–150 scales; the scale bracts are short, and hidden in the closed cone. The winged seeds are released when the cones disintegrate at maturity about 6 months after pollination. [9]
The cones are 3–5 cm (1 + 1 ⁄ 4 –2 in) long, the scales with a small, fragile prickle that usually wears off before maturity, leaving the cones smooth. Unusually for a pine, the cones normally point forward along the branch, sometimes curling around it. That is an easy way to tell it apart from the similar lodgepole pine in more western ...
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Young female cone Pinus sylvestris forest in Sierra de Guadarrama, central Spain. Pinus sylvestris is an evergreen coniferous tree growing up to 35 metres (115 feet) in height [4] and 1 m (3 ft 3 in) in trunk diameter when mature, [5] exceptionally over 45 m (148 ft) tall and 1.7 m (5 + 1 ⁄ 2 ft) in trunk diameter on very productive sites.