what's difference between lili and lotus

it should be lily (lilies)
lilies are 百合，while water lilies are 水仙 (those that people usually get for Chinese New Year)
lotus are 蓮花，which usually grows in water. People can usually find lotus in ponds.

i can't find the word lili in the dictionary
is it lily?
one lily, two lilies
lily is 百合
lotus is 蓮花 / 荷花

Water lilies and lotus can be grown in pond or in container. There are various kinds for each of them. For details, you can search for YAHOO, or go to web. site. www.texas.waterlilies.com for details.