Evergreen

A Silver Fir shuit shawin three successive years o retained leafs.

In botany, an evergreen is a plant that haes leafs in aw fower saisons, aye green. This contrasts wi deciduous plants, that completely lose thair foliage in the winter or dry saison. Thare mony different kins o evergreen plants, baith trees an shrubs. Evergreens include:

• maist species o conifers (e.g. hemlock, blue spruce, reid cedar, an white/scots/jack pine), but nae aw (e.g. larick)
• live aik, holly, an "auncient" gymnosperms like cycads
• maist angiosperms frae frost-free climates, such as eucalypts an rainforest trees

The Laitin binomial term sempervirens (leeterally, "always green") refers tae the evergreen naitur o the plant, for instance:

Acer sempervirens (a maple)

Cupressus sempervirens (a cypress)

Lonicera sempervirens (a honeysuckle)

Sequoia sempervirens (a sequoia)

Ulmus parvifolia 'Sempervirens' (an elm)

Leaf persistence in evergreen plants varies frae a few month (wi new leafs constantly bein grown as auld anes is shed) tae several decades (ower thirty year in the Great Basin Bristlecone Pine).