While digging through some photos, I came across a shot of some Cephalotus seed, both in its protective follicle and that of the naked seed itself. The scale, I would hazard, is self-explanatory. At one point, it was common to remove the seed for tissue culture purposes, since it was far simpler to clean on its own.
Thankfully, those days are as dead as disco . . .
Cephalotus follicularis "Hummer's Giant x Self"