Lewisia
Leycesteria
Leymus
Liatris
Libertia
Libocedrus
Ligularia
Ligustrum
Lilium
Limnanthes
Limnocharis
Limonium
Linanthus
Linaria
Lindera
Linnaea
Linospadix
Linum

Liquidambar
Liriodendron
Liriope
Lithocarpus
Lithodora
Lithophragma
Lithops
Livistona
Lloydia
Loasa
Lobelia
Lobularia
Lodoicea
Loiseleuria
Lomandra
Lomatia
Lomatium
Lonicera

Lopezia
Lophomyrtus
Lophospermum
Lophostemon
Loropetalum
Luculia
Ludwigia
Luma
Lunaria
Lupinus
Luzula
Lycaste
Lychnis
Lycium
Lycopodium
Lycoris
Lygodium
Lyonia

Lyonothamnus
Lysichiton
Lysiloma
Lysimachia
Lythrum
Maackia
Macfadyena
Machaeranthera
Mackaya
Macleania
Macleaya
Maclura
Macropidia
Macrozamia
Mahonia
Maianthemum