Posted by Kirsten on Fri, 09/26/2014 - 3:19pm
United States Department of Agriculture Natural Resources Conservation Service
Technical Note No: TX-PM-14-01 - Plant Materials Technical Note
This PDF publication lists techincal notes about many summer cover crop species. While the title says it is about plants "Adapted to North-Central West Texas and Southwestern Oklahoma", the species listed are not limited to those areas.
A sample article: