Great basin Bristlecone tree, new cones forming- The Great Basin bristlecone pine is a conifer, which means that it produces seeds in cones rather than in flowers. Pines are monoecious, meaning that each tree has both male and female pine cones. The male cones produce pollen and the female cones produce ovules which, when fertilized with pollen, become seeds. Pollination occurs by wind. Bristlecone pines produce seeds for thousands of years, but they produce fewer as they age.