As the seed cases age they lose their freckles and look like this, with a bulbous base and a curled end that is split open (where the seeds were released), and persistent short hairs on the surface. Where a plant was growing in spring/early summer there are sometimes piles of these at the site.
Here is an observation with older seed cases, on the edge of losing their freckles: https://www.inaturalist.org/observations/169180855 and here is another observation with the "pile of seed cases" https://www.inaturalist.org/observations/96648804