how many words do you need? a short while past, we did a thread on straw and hay-- and grasses. in Guns, Germs and Steel J.Diamond says there are 52 major varieties of grass.(techically, wheat, corn, and bamboo are all members of grass family-- there might be 1000 different kinds of bamboo, but bamboo is one of 52 types of grasses)
vocabulary depends on our technical needs. we came up with many different names for grasss used for hay/straw/fooder and bedding. (did we mention Kentucky Blue grass?--it is technically a bamboo.. N.Americas only native bamboo.)
Now, i have seen timothy grass, and bermuda grass, and even blue grass, i can't tell you why blue grass is a bamboo and bermuda grass isn't. but some one could.. maybe farmers, or biologists, or agraculturalist..
for me, grass is the green stuff the make a lawn, and needs to be mowed.
so my needs for names of grasses is rather limited.. and so is my list of words used to define grasses..
i like knowing someone has studied and classified, and named all the grasses, but i will pass on learning all they have to offer.