Tweedia and Phoenix, are a type of foliage?
Tweedia "Tweedia" is a genus of flowering plants in the Apocynaceae family, first described as a genus in 1835. The genus is native to South America. An ornamental plant, "Oxypetalum coeruleum", formerly included in this genus is commonly referred to as "tweedia".
Topiary Topiary is the horticultural practice of training perennial plants by clipping the foliage and twigs of trees, shrubs and subshrubs to develop and maintain clearly defined shapes, whether geometric or fanciful. The term also refers to plants which have been shaped in this way. As an art form it is a type of living sculpture. The word derives from the Latin word for an ornamental landscape gardener, "topiarius", a creator of "topia" or "places", a Greek word that Romans also applied to fictive indoor landscapes executed in fresco.