Lapp - Leci
- Lappa major Gaertn.
- Lappa minor Hill
- Lappula americana (A. Gray) Rydb.
- Lappula americana (A. Gray) Rydb.
- Lappula arida Piper
- Lappula cenchrusoides A. Nelson
- Lappula deflexa (Wahlenb.) Garcke p.p.
- Lappula deflexa (Wahlenb.) Garcke p.p.
- Lappula deflexa (Wahlenb.) Garcke ssp. americana (A. Gray) Hultén
- Lappula deflexa (Wahlenb.) Garcke ssp. americana (A. Gray) Hultén
- Lappula deflexa (Wahlenb.) Garcke ssp. americana (A. Gray) Hultén
- Lappula deflexa (Wahlenb.) Garcke ssp. americana (A. Gray) Hultén
- Lappula deflexa (Wahlenb.) Garcke var. americana (A. Gray) Greene
- Lappula deflexa (Wahlenb.) Garcke var. americana (A. Gray) Greene
- Lappula deflexa (Wahlenb.) Garcke var. americana (A. Gray) Greene
- Lappula deflexa (Wahlenb.) Garcke var. americana (A. Gray) Greene
- Lappula diffusa (Lehm.) Greene
- Lappula diffusa (Lehm.) Greene
- Lappula diploloma (Fisch. & C.A. Mey.) Guerke [excluded]
- Lappula diploloma (Fisch. & C.A. Mey.) Guerke [excluded]
- Lappula echinata Gilib.
- Lappula echinata Gilib. var. occidentalis (S. Watson) B. Boivin
- Lappula echinata Gilib. var. occidentalis (S. Watson) B. Boivin
- Lappula erecta A. Nelson
- Lappula floribunda (Lehm.) Greene
- Lappula floribunda (Lehm.) Greene
- Lappula fremontii (Torr.) Greene
- Lappula fremontii (Torr.) Greene
- Lappula hispida (A. Gray) Greene
- Lappula hispida (A. Gray) Greene
- Lappula lappula (L.) Karst.
- Lappula lappula (L.) Karst.
- Lappula marginata (M. Bieb.) Guerke
- Lappula marginata (M. Bieb.) Guerke
- Lappula Moench
- Lappula myosotis Moench
- Lappula occidentalis (S. Watson) Greene
- Lappula occidentalis (S. Watson) Greene
- Lappula occidentalis (S. Watson) Greene var. cupulata (A. Gray) Higgins
- Lappula occidentalis (S. Watson) Greene var. cupulata (A. Gray) Higgins
