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A mature female big-cone pine (Pinus coulteri) cone, the heaviest pine cone A young female or seed cone on a Norway spruce (Picea abies) Immature male or pollen 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 screw pine has been shown to have many uses. In coastal areas, it has been used for erosion control due to its numerous aerial roots. [10] These roots help bind the sand dunes along the coast from eroding water and wind. The leaves of P. utilis are used in different cultures for thatching and the production of numerous materials.
Each plant may be a few inches tall, and pine-cone-shaped or cylindrical. The plant above ground is almost entirely made up of its inflorescence, a tightly packed column of thick cup-shaped flowers. The groundcone produces haustoria which penetrate the roots of its host and provide it with water and nutrients.
The decline of longleaf pine forests in the Southeast, which have been reduced from over 90 million acres to 5.2 million acres. ... There are some species of pine cones that only open up to give ...
The cones thus grow over a two-year (26-month) cycle, so that newer green and older, seed-bearing or open brown cones are on the tree at the same time. Open cone with empty pine nuts. The seed cones open to 6–9 cm (2 + 1 ⁄ 4 – 3 + 1 ⁄ 2 in) broad when mature, holding the seeds on the scales after opening.
Pinus lambertiana (commonly known as the sugar pine or sugar cone pine) is the tallest and most massive pine tree and has the longest cones of any conifer. It is native to coastal and inland mountain areas along the Pacific coast of North America , as far north as Oregon and as far south as Baja California in Mexico.
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The pine cones of the tree resemble the cones of the Siberian pine (P. sibirica). The cones are larger and thicker and not as much elongated as Japanese stone pine (P. pumila) cones. On average the cones are 4 cm long and 3 cm wide. Each cone contains 40 nut-like seeds. Seeds are on average 8 mm long. Only about 15% (at most) of the seeds in ...
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