120 days, indeterminate — The plants grow from twenty five to forty inches and have white flowers. The pods contain two to four, medium-sized, brown colored seeds with black saddles around the hilums (eyes). According to USDA tests, they contain 43% protein and 19% oil.
There are three accessions in the USDA GRIN with all originating in China. PI 30744 was collected in 1911 in Liaoning, China and called 'Hei Mei Tou', which literally means "black eyebrow soybean" in Chinese. PI 548308 is reportedly developed from PO 30744 and PI 438486, also originating in China, came to the USDA from the N.I. Vavilov Institute of Plant Industry (USSR), whose accession number is VIR 63, in 1979. Each packet contains 25 to 30 seeds.