Chimonanthus praecox - native species of China. Linnaeus described this species as the variety, as the Calycanthus praecox. In 1819 Lindley introduced a new kind Chimonanthus.

Deciduu shrub, 2-5 m high. Leaves opposite, entire, ovat-lanceolata, 7-20 cm long, thin, green, rough upper part, becoming yellow in autumn.

Silver tree - evergreen tree, used for ornamental purposes, because the pyramid shape of the crown, the colorii leaves and frost resistance. The name 'concolor' refers to the fact that leaves have the same color on both sides.

Species native to North America, boreal Canada - Western Alaska, increases along with Picea mariana, Pinus banksiana, Populus tremuloides, Abies balms, Betula lutea and Acer saccharum. Port pyramidal, columnar, dense crown, 14-21 m high and 30-45 cm diamteru trunk, root surface, thin crust, less than 2.5 cm thick, gray-purple.

Ilex aquifolium is a shrub native to Britain, 8 meters high. Crown dense pyramid. Bark is smooth, gray, alternate leaves, coriacee, ovat-elliptical or pointed spinal rigid, acute, those tricky steps and with the lower branches of the PA wave the upper branches, evergreen, bright green, toxic.