![]() In cool temperate climates, fewer plants are evergreen. Most warm temperate climate plants are also evergreen. Most tropical rainforest plants are considered to be evergreens, replacing their leaves gradually throughout the year as the leaves age and fall, whereas species growing in seasonally arid climates may be either evergreen or deciduous. Evergreen trees also lose leaves, but each tree loses its leaves gradually and not all at once. Reasons for being evergreen or deciduous Ī southern live oak in South Carolina during winterĭeciduous trees shed their leaves usually as an adaptation to a cold or dry/wet season. ![]() Evergreens have generally a larger fraction of total plant biomass present as leaves (LMF), but they often have a lower rate of photosynthesis. Construction costs do not differ between the groups. They have larger leaf biomass per unit leaf area, and hence a lower specific leaf area. Generally, broad-leaved evergreen species have thicker leaves than deciduous species, with a larger volume of parenchyma and air spaces per unit leaf area. ![]() Japanese umbrella pine is unique in that it has its own family of which it is the only species.ĭifferences between evergreen and deciduous species Įvergreen and deciduous species vary in a range of morphological and physiological characters. Leaf longevity in evergreen plants varies from a few months to several decades (over thirty years in the Great Basin bristlecone pine ). The Latin binomial term sempervirens, meaning "always green", refers to the evergreen nature of the plant, for instance:Ĭupressus sempervirens (a cypress) Lonicera sempervirens (a honeysuckle) Sequoia sempervirens (a sequoia)
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