Sorry for your loss. Your mom's plants have officially become heirloom plants for your family. Obviously she had a love for green things and the cheeriness it brings into a home. I know you will think of her whenever you are looking or watering the plant. She left a part of her with you. You have gotten some good advice and ID so far.
Life is short, Break the rules, Forgive quickly, Kiss slowly, Love Truly, Laugh
uncontrollably, And never regret anything that made you Smile.