Rhododendron catawbiense Catawba Rhododendron 1. Round shrub, 6-lO' high, dense. Buds conical with rounded base, without leafy scales. Rhododendron maximum Rosebay Rhododendron 1. Round mound, somewhat tree like 6-20' high, tending to become straggly and open.
Buds conical with leafy, outside bud scales.
Rhododendron smirnowii Smirnowi Rhododendron 1. Round mound 6' high, dense and very slow grower. Buds pointed with heavy bud scales. Rhododendron carolinianum Carolina Rhododendron 1. Round plant 6' high, open habit of growth.