Question: I saw an interesting tree alongside northbound I-5, right where the South Columbian Way on-ramp to the freeway begins. There are four or five of this formal-looking, narrow, feathery-looking tree standing there together, in contrast to some broader, pyramidal deodar cedars nearby. I just love these trees. Do you know what they are, or who keeps track of plants in this area?
Answer: Looking at street view maps, I wonder if you are talking about several Calocedrus decurrens (incense cedar) trees that are planted there. It looks like this land (adjacent to the East Duwamish Greenbelt) is Washington State Department of Transportation property. You will likely be able to learn more from the DOT contact listed here.
Update: It is incense cedar, according to the WS-DOT Arborist. Now that I know this tree, I am seeing them all over town!
Reply: That is great to hear! Incense cedar is listed on Great Plant Picks. There are dozens of these stately trees at the Washington Park Arboretum, as well. I’ll send you a map.