On Sunday, June 23, 2013 2:17:35 PM UTC-6, Danny D. wrote:
Anyone ever had an infestation of acres of these yellow plants?

http://www5.picturepush.com/photo/a/...g/13393168.jpg



They seem to be taking over my otherwise barren dry hillsides:

http://www1.picturepush.com/photo/a/...g/13393169.jpg



The plant has a strange-looking stalk:

http://www2.picturepush.com/photo/a/...g/13393210.jpg



And very low-lying leaves:

http://www4.picturepush.com/photo/a/...g/13393207.jpg



The climate is San Francisco bay area, very dry, poor Franciscan

sediment soil, and lots and lots and lots of sunlight.

Could be Dalmatian Toadflax.