To answer, you have to look at why trees lose them in the first place.
Plants with large leaves may lose them because they hold a lot of water. If the water froze (or snow accumulated) on the leaves during the winter, the extra weight might cause weaker branches to break, leaving the branch open to disease next spring.
Gardening tips: flowers that grow in the winter::
selection of perennial and evergreen plants and flowers that bring color and the work you do to keep your property beautiful from spring to autumn, why let
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In areas where the length of daylight changes seasonally, there may not be enough light intensity to keep up with photosynthesis. Related to this is that the shorter days are usually cooler, and plant growth slows down. This can also prevent water inside the stem from moving as easily, and the water is used in photosynthesis.
Greenwich Public Schools: Dictionary of Plant Adaptation::
Leathery leaves are also keep the plants warm in the cold of the tundra. dies off in the winter but the roots survive to grow another plant when the
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How to Fix Brown Tips on House Plants: Causes of and Solutions for Tip ::
There are a number of reasons why indoor plants develop brown tips on their leaves, often referred to as tip burn. These problems are usually quite easy to fix.
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So when you see a plant that keeps its leaves, that plant has found some way to prevent these from happening. The plant may lie close to the ground, where it would be covered (and insulated) by snow. It may have a waxy coating on the leaves to prevent water loss. It may have an extremely small surface area which allows water to run off, and no snow can accumulate on them.
Celebrating Wildflowers - Plant of the Week - Plants of the Winter Solstice::
throughout winter to keep the earth beautiful at a time when deciduous trees shed their leaves. Why Are Some Rare? Are All Endangered? How Many?
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The advantage to keeping the leaves is that the plant doesn't have to use resources to grow new ones each year - and they have a head-start of photosynthesis over plants that do regrow them.
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