seeds do not develop enclosed within an ovary but are usually borne exposed on the surfaces of reproductive structures, such as cones.
The Conifers – Pines
largest genus of conifers
The Conifers – Pines (Division Coniferophyta
Pinus (pines) has over number of species
They include the world's oldest known living organisms
native to the White Mountains of eastern central California and the Snake range on the central Nevada-Utah bord
ne that was, unfortunately, cut down in 1964 was found to have been about years old
Pine leaves are
needlelike Arranged in clusters of two to five leaves each
Regardless of the number of leaves, each cluster forms a
Pines often live in areas where the topsoil is frozen for a part of the year?
Modifications : beneath the epidermis consisting of one to several layers of thickwalled cells.
Modification the epidermis itself is
coated with a thick cuticle.
Modification are recessed or sunken in small cavities.
Modification The veins and their associated tissues are surrounded by an
Modifications do not have the obvious air spaces typical of the spongy mesophyll of the leaves of flowering plants.