I don't know Sharon. The first thought I had even before enlarging the photo was Crown of Thorns (Euphorbia milii) albeit a young one. They do come in that color yellow. Does it have any stem on it yet at all? When they are very young they can have leaves & bloom like that yet not have grown any thorns yet. Look at this link:
Crown of Thorns (Euphorbia milii)
Particularly the red one -- see the flower form?
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