Pinus is a

Concept:On the basis of height, plants can be categorized into Herbs, Shrubs & TreesHerbs- any seed-bearing plant which does not have a woody stem and dies down to the ground after flowering. Examples- Tomato, wheat, grass.Shrubs- small to medium-sized woody plants having persistent woody stems above the ground. Examples- China rose, lemon.Trees- a perennial plant with an elongated stem or trunk. Trees are BIG and tall plants. Examples- Banyan, mango, cashew, Pinus, Cycas​Explanation:Pinus is a tree belonging to the group gymnosperms.These are large trees having pyramidal or ''excurrent shape'' like a ''Christmas tree'​ The stem of the pinus is branched containing resin canals that are found in the cortex regionThese canals secrete resins that contain turpentine oil.The pinus has two types of shoot long shoot and DWARF shoot.The long shoot arises from the main stem and continues to grow long (shoot of intermediate growth). It bears scale leaves.In the axil of scale leaf, dwarf shoot arises that does not continue to grow long and terminate at the tip to bear Foliage leavesThese Foliage leaves of Pinus are needle-shaped and called Pine needles.These are green and photosynthetic, such a shape of the leaf is an example of xerophytic adaptation to reduce the surface area for transpiration.Pinus has an ORTHOTROPOUS type of OVULE with a POLLEN chamber at the micropylar end.Pinus produce pollen in large quantities which are then dispersed in the environment by the air currents