Urusei Yatsura - Season 1 - Eps 158: What Do I Care for Talking Flowers!
Ran and Lum learn a valuable lesson about spreading rumors after Ran's talking flowers (named Ryuugenvillias) spread rumors about them to the entire town, soon affecting/hurting everyone's lives. (Aside from Ataru, oddly enough, who is mostly unaffected.)
About Urusei Yatsura

Title: Urusei Yatsura
First Air Date: 1981-10-14
Last Air Date: 1986-03-19
Status: Ended
Rating: 7.6/10 (from 36 votes)
Language: JA
Seasons: 2
Total Episodes: 218
Network: Fuji TV
Genres: Animation, Comedy, Sci-Fi & Fantasy, Drama
Production Companies: Pierrot, Studio Deen, Kitty Films
Synopsis
The invasion of an alien race known as the Oni begins a new life for Ataru Moroboshi, a lecherous trouble-making tenth grader in the small town of Tomobiki. After unwittingly proposing to the Oni princess Lum Invader instead of his sweetheart Shinobu, Ataru becomes a conduit for aliens arriving on Earth, causing all sorts of havoc for him and his companions, not to mention his own reputation!
Cast

Toshio Furukawa
Ataru Moroboshi

Fumi Hirano
Lum

Akira Kamiya
Syutaro Mendo

Saeko Shimazu
Shinobu Miyake

Kazuko Sugiyama
Ten

Machiko Washio
Sakura

Ichiro Nagai
Sakurambou

Noriko Ohara
Oyuki

Yuko Mita
Benten

Yō Inoue
Ran