July 2015

An irritating reminder … Yet another manifestation of the drought concerns poison oak; harbinger of itchy rashes. If you have been out on More Mesa you may have noticed that our abundant poison oak populations have come up in profusion this year, and in spite of little water. And you may also be aware that poison oak being deciduous, its leaves normally turn red and die in the fall. However in this fourth year of the drought, the leaves began to turn red in mid June and are already dropping. Because poison oak branches and stems are as dangerous as the leaves, but harder to notice without their famous “Leaves of three, let them be” reminder, all who visit More Mesa need to exercise special caution much earlier in the season … like now!

Poison oak can grow in several forms; in open sunlight as a dense shrub, or in shaded areas as a ground or climbing vine. The three leaflets have scalloped edges, resembling (slightly) the leaves of a true oak and can be bronze, bright green, yellow-green or reddish depending on the season. If you have inadvertently wandered into poison oak:

  • Remove your clothes as soon as possible
  • Wipe the suspect area with alcohol
  • Wash all exposed areas with cool running water. Use soap and water if possible … be sure to clean under fingernails
  • Wash clothing and all objects that came into contact with the plants
  • Bathe pets exposed to the plants.
2015Jul_03
Climbing Poison Oak in Spring
2015Jul_02
More Mesa Poison Oak in June
2015Jul_04
Poison Oak stems and fruit after the leaves have fallen
2015Jul_05
Poison Oak fruit

Similar Posts

  • July 2016

    Why Collect Seeds Anyway? Last month we discussed the Coastal California Poppy and how the Cheadle Center for Biodiversity and Ecological Restoration (CCBER) collects seeds of this native plant on More Mesa. However, in addition to poppies, More Mesa is a very valuable source in the collection of many other important native plants. These include…

  • November 2015

    El Niño: A New Feature on our Web Site Weather is critical to what happens on More Mesa. Drought and its effects on More Mesa have been discussed over the last several years. Now with a “too-big-to-fail” El Niño about to alleviate some of that drought, a new section Ecology->Climate and Weather, has been added…

  • |

    Spring 2017

    Spring 2017 This Month on More Mesa … Spring Flowers: The big rains that finally came, while turning the grasses green, have not produced many wildflowers. The problem could be that the rains came too late in the season. However, careful scrutiny will reveal some Blue-eyed Grass … here and there … and some extremely…

  • June 2015

    Lots of Special Birds A wide area of More Mesa has been surveyed within the last few days. We are most happy to report that 34 different species were identified during this one survey. Among them were two raptors, a Peregrine Falcon and a Cooper’s Hawk. Also of very special interest were eight singing Grasshopper…

  • | | |

    December 2011

    As another fairly quiet year on More Mesa draws to a close, and as has been our custom, we offer highlights of 2011. Updated Biological Resources Study More than eighteen months after field work for the Updated Biological Resources Study was completed, a draft report was issued by Santa Barbara County. The 429 page report, prepared by…

  • |

    April 2015

    On the bright side … Although the drought has increasingly occupied our awareness over the past three years, there are a few bright lights to mention on More Mesa this month. In a previous issue this year we talked about various wildflowers that have been seen … not in great abundance, but they are around,…