|
While some park visitors confuse sugar pine cones for giant sequoia cones, giant sequoia cones are surprisingly small and dense. The trees can hold on to their green cones for up to 20 years. Each cone holds around 200 to 230 oat flake-sized seeds, but not all of these seeds will go on to become trees. The majority of giant sequoia seeds are filled with tannins and do not have viable embryos that will germinate and grow. Over the course of two weeks our team collected giant sequoia cones from four different groves and 62 unique trees. We don’t collect too many cones from any given tree and we select trees that are spread throughout the groves to enhance the genetic diversity of the collection. We need to climb the giant sequoias to collect the cones. You may be wondering why we can’t just collect cones from the ground. There are several reasons. One reason is that it is best to collect cones from the upper two-thirds of the live crown to reduce the likelihood that they are self-pollinated. Another reason is that it's typically challenging to find enough green cones on the ground. Cones that have come into contact with the ground may also be contaminated with pathogens.
|