If a station didn't appear in the summary, or I couldn't find it elsewhere on line, I usually assumed the rainfall total was zero. Rainfall reports for Ocotillo Wells are reported at here for the month to date. Occasionally other stations are missing in that report if so, totals are taken from the Rainfall Summary Map. The storm totals were taken from the Weather Service Rainfall Storm Summary, except for Fallbrook and the Borrego Badlands / Ocotillo Wells. Table 1 gives the storm totals, in inches, as of the last day of each storm. In addition to desert stations, I've also given the rainfall from my house in Fallbrook, on the coastal side at 680 feet elevation, to show the large difference in rainfall between the wet side of the mountains and the dry side. However, when rainfall is from convection, the deserts can at times get more rainfall than the coast. This occurs whenever our rainfall is mostly orographic. Rainfall is usually highest on the mountain slopes, especially on the west edge of the Borrego Desert, and falls off dramatically with lower elevation to the east. Rainfall is the most important determinant of blooms. The locations for each hike are in the detailed reports below more information is sometimes given in Botanical Trail Reports in Chronological Order, which usually includes more information about the bloom on each trip. In the drier areas to the east, there can be large differences between the edges of washes and the middle of washes, and between shady canyons and open areas. Similarly, even within those canyons on the west, there can be large differences between the north-facing and south-facing slopes, and between canyons with permanent water, like Borrego Palm Canyon, and drier canyons. Note that there is often quite a difference in the annual bloom between the moister canyons west of Borrego Springs and the drier areas around the Badlands. However, the information here will give the reader an idea of what the bloom is doing in the Borrego Desert. Because the locations change, the numbers of species in bloom, and the number of plants in bloom, cannot usually be directly compared from trip to trip. The information here is by no means a definitive list to what is blooming at all locations in the Borrego Desert it only records the species I've seen in bloom on my trips that occur roughly every fourth day. In addition to specific information about current conditions, this page also gives some general information on what is needed to germinate those annuals, and what is needed to sustain the annual bloom. The date of the last update to this page is given at the bottom of this page.įor the progress of last year's bloom, see 2008-2009 Blooms. This page gives information about the 2009-2010 bloom for all species in this area, with emphasis on the annuals that are responsible for the widespread showy blooms that appear in some years on the desert floor. The Borrego Desert is the northern part of Anza-Borrego Desert State Park below an elevation of ~3000 feet, named for the Borrego Valley and the town of Borrego Springs ( map and expanded definition). Links to Other Webpages on Anza-Borrego Desert State Park Blooms Pictorial Gallery of Species in Bloom To Date in 2009-2010, organized by flower color List of Species in Bloom On Each Trip, With Photographs Number of Species and Plants in Bloom On Each Trip Summary of Annual Germination, Growth and Blooms in 2009-2010ĭetailed Germination, Growth and Bloom Reports From Each Hike General Requirements for Annual Germinationīad Bloom Years Are All The Same Good Bloom Years Are All Different As recently as 15 years ago, there was no Asian mustard here, and the native wildflower displays were much more extensive. See also the larger picture showing the evil non-native Asian mustard, Brassica tournefortii, about to put an end to future displays like this here. Picture taken on 23 February 2010 a few hundred feet past the end of the pavement of DiGiorgio Road, from immediately alongside the road. Most of this page has not been updated since 8 March 2010 due to finding too many lovely blooms only the plots are being kept up to date through the end of the low desert season in mid-April.įield of spectacle-pod, Dithyrea californica Plant Species of the Borrego Desert: 2009-2010 Blooms Plant Species of the Borrego Desert: 2009-2010 Blooms
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