The male cones of the incense cedar are out by the millions, literally, and they are starting to release their pollen. The male cones are small but they are easy to see. If the male cones are out releasing pollen, then the female cones must be around too. They are not as obvious, and I used Oregon State University’s incense-cedar webpage to help me out with identifying them.
If you look at the first photo below, you can see the light brown male cones and on the end of the branch, you can see the female cones. I took a few close-ups of the female cones to show you the small compact, rosette of leaves that forms a small nodule at the tip. They start to turn slightly yellow as they form.
I decided to cut one open to see what it looked like inside. To my surprise, the first ones I cut open were slightly discolored and had a small, orange caterpillar inside. I started to wonder if this caterpillar was causing the little nodule on the tip of the branch. I eventually found one that didn’t have the caterpillar inside. It is the fourth photo below and it appears that it contains some sort of ovaries to receive the pollen. That photo was taken with a macro lens that I fit over my phone. I wanted a more magnified image, and I tried looking at the cone under a microscope in the nature center at the arboretum. They were pretty much the same as my macro lens. Plus the microscopes are fairly old and the image quality wasn’t as good as I would have liked.
I have continued to open these female cones and every one of them has contained that caterpillar. I didn’t want to pick anymore off the tree so I looked on the ground in the golden carpet of male cones that had fallen off. Mixed in are a bunch of the female-looking cones and the few that I opened had the orange caterpillar inside. So far, I have only been able to find that one cone that didn’t contain a caterpillar.
So, at the moment I still have mysteries to solve, questions to answer. What is that orange caterpillar going to become? Were the eggs laid inside the female cones or do tips with the caterpillars look similar to the female cones at this point? I also want to know why so many male cones are dropping off the tree, has all of their pollen been released already? There are so many falling off the trees at the moment, that you can see them bouncing off the ground and feel them pelting the top of your hat. Why are the tips with the female caterpillars being dropped too? Will the caterpillar survive on the ground? Is this part of its life cycle?
I’ll keep you posted when I find out anything. Nature is an inexhaustible source of mysteries and wonder. I hope to see you out there.