conifer, any member of the division Pinophyta, class Pinopsida, order Pinales, made up of living and fossil gymnospermous plants that usually have needle-shaped evergreen leaves and seeds attached to the scales of a woody bracted cone.

The largest conifer leaves were those of the extinct genus Cordaites, with great paddle- or strap-shaped leaves up to 1 metre (3 feet) long and 15 cm (6 inches) wide. Most conifer leaves, whatever their shape, minimize water loss.

Conifers are a group of trees and shrubs that produce cones. The cones carry their seeds. Most conifers are evergreens, or trees that keep their leaves year-round. Their thin leaves are usually called needles. There are more than 550 types of conifer. Some of the most well-known are cedars, cypresses, firs, junipers, larches, pines, redwoods ...

2025年2月6日 · Pines have two types of branches, long shoots and short shoots, and three types of leaves, primordial, scale, and adult. Seedling plants bear the lance-shaped spirally arranged primordial leaves. The triangular scale leaves, also lance …

Most conifer leaves, whatever their shape, have a waxy coating that keeps the leaves from losing water. Although most conifers keep their leaves year-round, some kinds, such as larches and bald cypresses, shed their leaves for the winter. Conifers typically have …

Conifer leaves vary in shape but generally have a reduced surface area to minimize water loss. Especially in the pines, firs, and spruces, the leaves are long and stiff and are commonly referred to as needles.

Seed cones highly modified with a few opposite pairs of small bracts, each with a greatly reduced scale remnant strongly dominated by a pair of ovules; only 1 ovule develops into a large seed with a fleshy seed coat; leaves are large yewlike needles carried in opposite pairs; found in East Asia, the plum-yews (Amentotaxus, Cephalotaxus) are the ...

The fine feeding roots of conifers, like those of many flowering plants, do not work alone. They get a boost in their work by associating with specialized fungi whose structural filaments (hyphae) intermingle with them to form mycorrhizae .

6 天之前 · The leaves of many gymnosperms have a thick cuticle and stomata below the leaf surface. The tree or shrub is the sporophyte generation. In conifers, the male and female sporangia are produced on separate structures called cones or strobili.

A larch has the pyramidal growth habit typical of conifers, but the leaves are shed in autumn like those of deciduous trees. The short needlelike leaves are arranged spirally on new growth and in whorls at the tips of short spurs on older twigs.