蓓 n. bud (part of 蓓蕾 (bèilěi))
萌 n. bud; vt. sprout, germinate (part of 萌芽 (méngyá))
I asked a student (who happens to have the name 萌) if 蓓 and 萌 are the same, but she said they're different. I'm not sure why though.
My guess from the above is that 蓓 is bud that will turn into a flower, whereas 萌 is more general, and refers to anything that sprouts.
Question: What's the difference between 蓓 and 萌?