- swamp laurel, bog laurel, bog kalmia, Kalmia polifolia - laurel of bogs of northwestern United States having small purple flowers and pale leaves that are glaucous beneath
--1 is a kind of kalmia
- sweet bay, swamp bay, swamp laurel, Magnolia virginiana - shrub or small tree having rather small fragrant white flowers; abundant in southeastern United States
--2 is a kind of magnolia