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Seeds to Start Indoors. Some seeds grow best when they’re directly sown in the garden, while other seeds grow better when they’re started inside and transplanted outdoors later on. Indoor ...
The female cone (megastrobilus, seed cone, or ovulate cone) contains ovules which when fertilized by pollen become seeds. The female cone structure varies more markedly between the different conifer families and is often crucial for the identification of many species of conifers.
The seeds are large and heavy, 10 mm long and 8 mm broad, with a short rounded wing 13 mm long; [4] they may be bird or mammal dispersed as the wing is too small to be effective for wind dispersal. Trees start producing seeds at about 20 years of age.
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.
Seed dispersal is mostly by wind, but some species have large seeds with reduced wings, and are dispersed by birds. Analysis of Pinaceae cones reveals how selective pressure has shaped the evolution of variable cone size and function throughout the family.
Douglas-fir seeds are an extremely important food source for small mammals such as moles, shrews, and chipmunks, which consume an estimated 65% of each annual seed crop. The Douglas squirrel harvests and hoards great quantities of Douglas-fir cones, and also consumes mature pollen cones, the inner bark, terminal shoots, and developing young ...
Thankfully, when grown indoors, they don't get nearly that big. But Norfolk Island pines can still max out at 6 to 9 feet tall. At the holidays, Norfolk pines often are sold as living Christmas trees.
Many Pinus species adapted to this fire-prone environment with serotinous pine cones. A set of conditions must be met in order for long-term seed storage to be evolutionarily viable for a plant: The plant must be phylogenetically able (pre-adapted) to develop the necessary reproductive structures; The seeds must remain viable until cued to release
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