Native Plant Information Network - provided by the Lady Bird Johnson Wildflower Center in Austin; site includes a national directory of native plant species, guidance in growing Texas wildflowers, and a clearinghouse of native plant sources and organizations.
Natural Resources Information System - state's clearinghouse and referral center for natural resources data. Also serves as distribution center for U.S. Geological Survey maps. Numerous other map collections available for in-house use or reproduction.
Ozone in Texas - from the Texas Natural Resources Conservation Commission, site provides forecasts, facts, and warnings.