Re: What is the difference between C3 and C4 plants and could you give examples

Complete question:

I understand the difference in photosynthesis but does this affect what 
the plant looks like or how it stores sugars? Examples would really help.

Reply:

There is no real difference in outward appearance or sugar storage between C-3 
and C-4 plants. C-4 plants comprise only about 0.4% of angiosperms but include 
important crops such as maize or corn, sugarcane, sorghum, millet, and tropical 
pasture grasses. The lawn weed crabgrass and some sedges are also C-4. Most C-4 
plants are tropical monocots, but it does occur in dicot species as well, such 
as pigweed (Amaranthus) and some Atriplex species. Few trees or shrubs are C-4. 
A few Euphorbia tree and shrub species from Hawaii are C-4.

C-3 grasses include wheat, rice, barley, and bluegrass. 

Reference

Salisbury, F.B. and Ross, C.W. 1985. Plant Physiology. Belmont, CA: Wadsworth.