There are several artists using this name:

1) Pyracantha is a Turkish Rock & Metal band formed by Emre Diker (Rhythm Guitar & Back Vocals), Erçin Burç (Drums), Eren Suna (Solo Guitar), Gül Erkekli (Vocals) and Mert Öztop (Bass Guitar) in 2006. They are overrated with their first song Ruhsuz Kadın and the currently famous songs Son Defa and Anlatır Tekrar.
2) Pyracantha is a Swiss Black Metal band:
Pyracantha was founded in 2003 by Manuel Jehli (Drums) and Alessandro Candrian (Guitars) in Unterägeri (ZG). After a short time, Alexander Donders (Guitars) joined the band. Gabriel Leclerc (Vocals) and Boban Aleksandric (Bass) followed. Since 2004 they recorded a demo and a LP. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.