how does grass get pollinated?

The vast majority of grasses are pollinated by wind. On a breezy day in a grassy place you can usually find anthers and stigmas hanging over the edges of lemmas. Wind-pollinated plants sometimes have unisexual flowers, either separate male and female flowers on the same plant (monoecious plants) or males and females on separate plants (dioecious plants). Grasses can be monoecious or dioecious but this is not common. A good example of a local dioecious grass is salt grass (Distichlis) with separate male and female individuals.

Remember that all of these parts are tiny. The entire spikelet can be the size of a pinhead. You need at least a 10X hand lens or a dissecting microscope to see the parts clearly. For identification, the important parts are the glumes and lemmas. For most grasses you will find the two glumes to be the two lowest scales on the spikelet. The lemmas are the little scales farther out the spikelet. Practice will build confidence in identifying these parts.

Insect Pollination

Occasionally a grass may turn out to be pollinated, not by wind, but by insects. Now we're speculating wildly, but it looks like this might be the case with the common Blue Maidencane . This grass tends to grow as isolated patches in low wet woods which is not a great place to depend on wind for pollination. Further, each clump is probably genetically identical. So to exchange pollen with other clumps, a long-distance insect may be the key and the spikelets look like they might be adapted for this. The anthers are bright yellow and held out on long filaments. The stigmas are purple and displayed conspicuously . Interestingly, this species also makes underground "cleistogamous" spikelets which are able to form fruits without pollination. Again, this may be a reflection of unreliable pollination.

Most grasses are wind pollinated, the pollen of grasses is small and light and the staminate flowers are often times produced higher on the plant than the pistillate flowers.

Nice answer John....but when you take some ones else work you need to attribute the source, which in your case is from: http://www.floridagrasses.org/Master_data/Grass_bi...