Pinus do not have monomorphic stem branches please give me reason
Answers
The stem of Pinus
It can be simply characterized by the presence of distributed conspicuous resin-duct throughout the stem. But the secondary wood consists of numerous pits on their radial wall.
The young stem of the Pinus has epidermis which has single layer of cells with thick cuticle. A few sclerenchyma patches can be found right below the epidermis. In pinus, the inner most layer of the cortex can be defined as endodermis.
Phloem of the Pinus has phloem parenchyma and sieve tube which lies outer side of the bundle. In Xylem, there is no true vessel but exclusively of tracheids. It has distinct annual rings like dicotyledonous stem.
The younsmg stem of the Pinus resembles the anatomy of dicotyledonous stem in many respects. There happens like the general arrangement of the various tissues from the circumference to the centre is basically the same. But it differs, from the dicot stem in having a large number of resin ducts filled with resin. So Pinus do not have monomorphic stem branches.