Male cone of Pinus

• Male cone occurs in clusters near the ends of long branches like the short branches are produced in the axils of the scale leaves on long branches. Each male cone is simple ovoid structure about one inch long with 60 to 100 spirally arranged microsporophylls or stamens. They arise from the central axis and pass out horizontally.

• Each microsporophyll (stamen) has a short stalk and much longer expanded scale like part on the under surface of horizontal part are borne two microsporangia or pollen sacs.

• Inside the sporangia large number of microspore mother cells is present which undergo reduction division and produce haploid microspores or pollen grains.