// SPECIES INDEX · NE OKLAHOMA
3,800+ species for Oklahoma and the surrounding region — the native trees of the Cross Timbers, the perennials of the tallgrass prairie, the shrubs and vines of the river bottoms — plus ecologically positive non-invasive cultivars and the vegetables, herbs and fruit we plant alongside them. Every species has a page with growing conditions and native range; our hand-written field guides also cover identification, ecology, wildlife value, horticulture, propagation and use.