Dear Editor, Water-quality lands? Native tallgrass prairie is one of the best water filters money can buy, but it ain't the cheap throwaway from Box-Mart. They're rare, they're getting rarer, and – gasp – they're on the Eastside [“Dreaming of Buffalo,” News, Dec. 23]. Early botanist Mary S. Young described the profusion of wildflowers along the Austin and northwestern RR line in and around Austin. This is the same transit line that Cap Metro has been furiously promoting, and yes, some of that old wildflower glory is still there. Let's give the prairies on the Eastside the attention they're long overdue.