(Sorghum bicolor); see the drop-down menu for packet sizes
It appears that Minnesota Amber Sorghum is also known as Black Amber, Ames Amber, Waconia Amber, Dakota Amber and Early Amber. The seeds are a rich dark black color.
Sorghum is a versatile crop and is historically grown as a sweetener, especially during times of economic hardship. It is mention in this 1941 Iowa State University report as suitable for syrup production in Iowa.
Resources we've found useful in our sorghum syrup adventures are listed in the Rox Orange entry.
Packet size options, minimum:
a) 7 grams (1/4 oz)
b) 50 hand selected seeds