San Diego County is the most botanically diverse area in the U.S., with nearly 2,000 species, many of which are endemic (unique to a defined geographic area, so many are found only in San Diego County). There are not many places where you can experience the ocean, the snow, and the desert within a couple hours. The desert transition habitat is found down the east side of the Peninsular Ranges, and this is the site of our recent seed collection trip. The weather forecast looked ominous, but we were optimistic. To get to our site, we had to drive up and over the Cuyamaca Mountains and out into the lower elevations beyond.
When we finally reached our site, we saw a mix of cacti, shrubs, and huge granite boulders. It was freezing cold and very windy. At certain points the wind became so strong it was difficult to open the truck doors to get out and identify plants. Despite the rough conditions, it was a beautiful place to explore. We saw desert apricot Prunus fremontii, golden gooseberry Ribes quercetorum, and grape-soda lupine Lupinus excubitus in bloom.
As the day wore on, the weather only got worse. When we tried to collect a sample of apricot mallow Sphaeralcea ambigua, the rain turned to hail, and we decided to admit defeat for the day.
On the drive back up and over the Cuyamacas, the hail turned to snow! It was so much fun to watch everything turn white throughout the course of our drive. We followed a snowplow most of the way down the mountain; I never would have imagined experiencing something like that in Southern California! As we dropped in elevation, the snow slowly changed back into rain and everything turned green again. It was odd to realize that we had only been a half an hour away from the ocean.
San Diego is truly a remarkable place, and I couldn’t ask for a better area to study plant diversity.
Lauren Anderson is an intern at the San Diego Zoo Institute for Conservation Research through the Bureau of Land Management’s Seeds of Success Program. Read her previous post, Wake Up, Seeds! Germination Testing.