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Pinecone fishes are small and unusual marine fish of the family Monocentridae. The family contains just four species in two genera , one of which is monotypic . Their distribution is limited to tropical and subtropical waters of the Indo-Pacific .
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.
The leaves are in fascicles of three, [6] needle-like, yellow-green, twisted, and 9–15 centimeters (3 + 1 ⁄ 2 –6 in) long. The cones are resin-sealed and irregularly shaped, [4] 8–16 cm (3 + 1 ⁄ 4 – 6 + 1 ⁄ 4 in) long and clustered in whorls of three to six on the branches. The scales end in a short stout prickle.
The gametophyte of D. obscurum is disc shaped prothallus, [11] measuring an average of 1.5 cm (0.6 inches) in diameter. [12] It closely resembles other gametophytes of Lycopodium and related genera, so it cannot be identified by gametophyte alone.
At full size they are 6–11 centimeters in length. [4] A seed cone takes two years to fully ripen. Each scale of the cone is tipped with a thin, brittle pickle 4–10 millimeters long. They fall from the tree soon after releasing their seeds. [5] Pinus aristata has seeds that are gray-brown to nearly black in color with darker spots and 5–6 ...
A 30-year-old commercial pine tree grown in good conditions in Arkansas will be about 0.3 m (1 ft) in diameter and about 20 m (66 ft) high. After 50 years, the same tree will be about 0.5 m (1 + 1 ⁄ 2 ft) in diameter and 25 m (82 ft) high, and its wood will be worth about seven times as much as the 30-year-old tree. This however depends on ...
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The outstanding characteristic of this tree is the large, spiny cones which are 20–40 cm (7.9–15.7 in) long (occasionally as much as twenty inches (51 centimeters) length has been observed), [7] 23 centimeters (nine inches) in width, [8] and weigh 2–5 kg (4.4–11.0 lb) when fresh. Each segment, or "scale", of the cone is tipped with a ...