RE.STORE has two types of pea protein:
1.  Hydrolyzed Pea Protein
2.  Hydrolyzed Pea Protein PG-Propyl Silanetriol

Both are specifically formulated for hair care products.  Both are derived from the common (or humble as KM puts it) pea, Pisum sativum.
Per studies, “Increased hydration of the hair is a key benefit of hydrolyzed proteins”.
Info on #2 (Don’t use the ingredient name of course!!)  
  • Crodasone™ P cross links on drying to form a protective network that prevents cuticle cracking, which may be caused by styling or blow-drying. It is deal for use in all hair care applications, especially thermal protection styling products or leave-on conditioners.
  • Crodasone™ P is an advanced copolymer derived from Pisum sativum or ‘pea’, a superfood rich in essential amino acids, and silicone designed for hair care systems.
Also an interesting fact about peas, they are ‘rotational crops” (as are soybeans).  This means that farmers rotate plantings of crops such as corn one year with peas the next year.  The legume plants (of which peas are one type) enhance the soil by adding back nitrogen and reducing the pest load (with different crops each year the pests are less likely to mature, thrive, remain).  Crop rotation conserves soil water.  A good match for KM values I’d say (PS I learned about peas and soybeans from living in Iowa.)  
According to USDA, here is where peas grow.
“Major pea producers are China, India, Canada, Russia, France and the United States (Food and Agriculture Organization, 2012). In the United States, the most production occurs in Washington, Montana, and North Dakota (USDA-National Agricultural Statistics Service, 2011).” 
And I know you can weave this all into something worded better and more elegantly.  Let me know if you need any more info.
Whew just under the deadline I think.