Related Terms. 1  operating system virtualization. 2  mobile operating system (OS). 3  OS-operating system. 4  server operating system. 5  system. 6  Microsoft Windows XP operating system. 7  Linux OS (Operating System). 8  paravirtualized operating system. 9  NOS-network operating system. 10  Chrome OS.
Plant evergreen ornamental varieties for year-round specimen plants. Grasses include blue oat grass (Helictotrichon sempervirens) and tall blue fescue (Festuca amethystine). Blue oat grass is a semi-evergreen fountain grass. It grows well in zones 4 through 9 and needs dry, well-drained soil.
Basically these are plants that retain their leaves all year around. The leaves are usually green in color but there are certain evergreen shrubs that give off foliage of other colors like red, purple, orange, yellow and silver. A popular feature in all evergreen shrubs (in some case hybrids) is that they maintain a fixed small or medium heighs and have a clustered branch growth.