In this article we will discuss about the modes of reproduction in pinus with the help of diagrams. Pinus is monoecious but male and female cones are borne on separate branches. The male cones are on lower and female cones are on upper branches. The male cones which replace dwarf shoots, occur in clusters (Fig. 16.7A). The number of male [...]
In this article we will discuss about the anatomy of pinus with the help of diagrams. Anatomy of Needle: The solitary needle of P. monophylla (Fig. 16.3A) is circular. This is semicircular in the two-needle pine (P. merkusii), and triangular in the three-needle pine (P. roxburghii) (Fig. 16.3B). The epidermis is of isodiametric lignified cells covered with cutin. Hypodermis of [...]
In this article we will discuss about the morphology of pinus with the help of diagrams. The plant is a native of temperate regions and high altitudes of tropics. The genus is an evergreen tree of over 100 species. It is spread over Northern Europe, North and Central America, subtropics of North Africa, Canary Islands, Afghanistan, Pakistan, India, Mynmar, Philippines [...]