Here's an article from the UCCE San Joaquin County Field Notes newsletter (May 2013.) Medusahead has been invading our rangelands for years. The Natural Resource Conservation Service (NRCS) has photo documentation from the early 1980s with large stands of medusahead on the east side of the county.
Seeing yellow these days? As inthose brightly-blooming yellow-flowering shrubs along roads and hillsides from the Bay Area to the Sierra Nevada foothills. BroomFrench, Spanish, and Scotchis in full spring bloom, even at higher elevations.
Spring is finally upon on us in Northeast California. The joy of flowering trees, green grass, and warmer weather is here! Unfortunately, the familiar site of yellow dandelion flowers and other broadleaf weeds in my lawn is also abundant.