Is that thing an epicotyl? No, it's not.
Jim McKenney (Fri, 21 Jul 2006 18:54:13 PDT)

Joe, I haven't seen a germinating Crinum seed in years, but as I recall the
ones I've seen germinate like Hymenocallis liriosme.

Here's how I interpret it:

I think what you are seeing is a combination of the cotyledon and the
hypocotyl. Being a monocot, Crinum has only one cotyledon, and it typically
remains attached to the seed and may not appear above ground. There is a
point along that cotyledon-hypocotyl axis where this axis thickens and the
incipient bulb begins to differentiate; the first true leaf will emerge from
this area; that's the epicotyl. Anything distal along that axis is
hypocotyl.

Jim McKenney