still on my desk

mysterious seeds which appeared on the patio
http://theseedsite.co.uk/seedpods.html
and they perplex me
http://theseedsite.co.uk/seedsize16.html

they have white on the ends, not in the middle
https://torontobotanicalgarden.ca/blog/word-of-the-week/word-of-the-week-hilum/
so is that not hilium?

but they are not this?
https://awkwardbotany.com/tag/castor-bean/
and not this?
https://www.southernharvest.com.au/seed/corn-%E2%80%98black-aztec%E2%80%99

~~~~

for the first time it occurs to me that I could try to plant them?