• Rainbow over Half Dome

    Yosemite

    National Park California

There are park alerts in effect.
show Alerts »
  • No telephone service along Tioga Road

    There is no telephone service available along the Tioga Road from White Wolf to Tioga Pass (including Tuolumne Meadows) until further notice due to a damaged phone line. This affects all telephones, including hotels, campgrounds, and payphones.

Winter Wind Valentine

February 15, 2013 Posted by: BW - Volunteer Interpreter

Some travelers to Yosemite this winter may be surprised to find something besides snow in the air. Pollen from the incense cedar (Calocedrus decurrens) is flying far and wide this February. All conifers are wind pollinated, but the incense cedar is our early leader in this annual love fest. The strategy of wind pollination requires the production of massive amounts of pollen to get the job done. This is why the vast majority of airborne allergens are pollen. However, the reactions associated with incense cedar pollen are typically mild if noticed at all. The pollen is produced in the yellow-green male cones which developed on the tips of some branches in the fall. They should be easy to spot along any trail in Yosemite Valley. The goal is for the wind to carry some of this pollen to the inconspicuous female cones which grow on the same trees and will mature by late summer.

 Incense cedar pollen cones along the tips of the needles.

Incense cedar pollen cones along the tips of the needles.



Nature Scene, BW, Yosemite Valley




Post A Comment

Submit Comment

Did You Know?

Cars and campers in a meadow in Yosemite Valley.

Unrestricted camping is no longer allowed in Yosemite Valley because of damage it causes. The placement of campgrounds and campsites has changed over the past 75 years in response to a growing understanding of river dynamics, geologic hazards, and the park's natural and cultural resources.