ID of a Sabal seedling

[Phoenikakias]

Any guess what this Sabal seedling might be? I obtained seeds as Sabal mexicana, but resulted seedlings have a fairly soft leaf tissue, not what I had been expecting from mexicana. Also seedlings have some brownish scales on petioles, which is not common for mexicana. Do not mind about the older leaves, they were bent by the wind, exactly because tissue is soft.

[TexasColdHardyPalms]

Virtually impossible to say for sure at this stage. Could be mexicana, riverside, causarium, rosei or anything in between. 

[Phoenikakias]

Thanks that you  give hope, that it can still be mexicana. No way that it is causiarum. Latter has bigger juvenile leaves, which are fairly hard textured. I think riverside has small seeds, while the seeds of this specimen were almost double the size of palmetto's. 

[TexasColdHardyPalms]

6 hours ago, Phoenikakias said:

Thanks that you  give hope, that it can still be mexicana. No way that it is causiarum. Latter has bigger juvenile leaves, which are fairly hard textured. I think riverside has small seeds, while the seeds of this specimen were almost double the size of palmetto's. 

Ok knowing the seed size helps a LOT. Double the size of palmetto leaves you with a mexicana or rosei.  Uresana seeds are much bigger than mexicana.  Riverside seeds are a little bigger than causarium and dominguensis.