English: About 9 ounces of sourdough starter derived from Carl Griffith's 1847 Oregon Trail Sourdough sits in a plastic tub.
A sample of live starter cultures was received from the 1847 Oregon Trail Sourdough Preservation Society, also known as Carl's Friends, which maintains and shares the historic sourdough starter. This lineage has been continually cultivated since at least 1847 for making bread.
This picture was taken about 13 hours after the starter was fed with fresh flour and water, at about a 3:2 ratio, and it has bubbled and risen against the lid, pushing it open.
The lid of the container is labeled "Carl". The side of the container is labeled "Carl Griffith 1847".
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