I’ve been ‘harvesting’ my dyer’s broom (Genista tinctoria) seed pods. I handed out a bunch at the last NOBO meeting. However, if anyone else wants any let me know and I will save some out for you. It gives a nice clear, light yellow with Alum mordant.
Here’s a link to a picture of the plant in bloom (and being harvested): http://www.fibercraftstudio.org/about_us (scroll down on the page)