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Groundcones are holoparasitic, meaning they depend entirely on a host plant for nutrients and contain little or no chlorophyll. These plants often parasitize alders but they are found on many other plants. Groundcones often look at first glance like pine cones lying on the ground, especially when they are brown in color. They may also be shades ...
The seed cones are highly modified, reduced to a central stem 1–5 cm long bearing several scales; one to five scales are fertile, each bearing a single seed surrounded by fleshy scale tissue, resembling a drupe. These berry-like cone scales are eaten by birds which then disperse the seeds in their droppings.
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The male plants produce fragrant colorful flowers in long spikes. [10] These long spikes are with 8–12 stamens inserted pseudo-umbellately on slender columns 10 to 15 millimetres (0.39 to 0.59 in) long. [8] The female plants produce fruits resembling pineapples or oversized pine cones changing from green to yellow/orange when ripe. [10]
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.
Aug. 16—A local non-profit group's ongoing efforts to spruce up Pine Avenue recently got a boost in the form of new floral planters along the commercial district from Hyde Park Boulevard to the ...
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.