it is atype of perrenial gras of about 36 species
Purple Fountain Grass is by definition, a perrenial. However, in planting zones 1-6 it is used as an annual as it will not withstand frost. Calling Purple Fountain Grass is a dirty sales trick to dupe unsuspecting customers in zones 1-6 into a sale. So, there you go.
annual ryegrass
annual ryegrass
Most of it is perrennial.
Annual bluegrass
Corn is the tall annual cereal grass that bears kernels on large ears.
Switch grass makes a good ground cover. It is also very ornamental. Plus it can be used to make ethanol.
Lawn grass seed, even under ideal circumstances, can take three weeks to germinate - that's normal. It MUST be kept moist all the way through that time. Perrenial rye grass seed can germinate in a week, and is widely used for "maintenance" lawns (like on expressway embankments, etc.)
Darnel
maize
Corn