I am new here, but came across this thread in my perusing. I also purchased some seed on ebay. I have already planted mine and have some growth

I cannot wait for them to mature!!!
I have copy and pasted the pics and description from where I bought mine. These pics are supposed to be the actual parent crop to my seeds.
Glass Gem was developed in the traditional way by Cherokee Carl Barnes. It only recently became publically available due to his advancing age. My original seed came from a grower in North Carolina who received it from The Heirloom Vegetable Seeds, Seed Trust.
I plant about 3 weeks before my average last frost date. I grow plants 1 foot apart in rows 30" apart. Best results are obtained by planting several shorter rows in a block rather than one long row. This variety is too long season for my garden, so I only harvested seed from about 1/3 of the crop. (I have selected for shorter season.) Glass Gem is a robust corn, growing about 9 feet tall in my garden, and producing up to 15 cobs per plant if given enough space. [Update January 29th: I actually grow this corn and took pictures during the growing season. Check out the picture at the bottom showing one corn plant with 16 cobs on it.]
Some authors on the web have described Glass Gem as a popcorn. While some kernels do pop, the expansion ration is only about 7 times. A great popcorn expands around 24 times.
Landrace
A landrace is a foodcrop with lots of genetic diversity which tends to produce stable yields under marginal growing conditions. Landrace crops are adaptively selected for reliability in tough conditions. The arrival of new pests, new diseases, or changes in cultural practices or in the environment may harm some individuals in a landrace population, but with so much biodiversity many plants are likely to do well under the changing conditions. With the tremendous genetic diversity in these seeds I expect them to adapt to just about anything your garden throws at them. Save the seeds from your best growing plants to adapt the variety to your garden.
Growing Conditions
I do not use herbicides, pesticides, fungicides, or other poisons in my garden: I would rather put in a little more labor.