| Lappula barbata (M. Bieb.) Gürke | | a | | Lappula barbata (M. Bieb.) Gürke | | 21470 | |
| Lappula redowskii auct. Amer. | Lappula occidentalis (S. Watson) Greene var. occidentalis | | | Lappula redowskii auct. Amer. | Lappula occidentalis (S. Watson) Greene var.occidentalis | 21473 | 318336 |
| Lappula squarrosa (Retz.) Dumort. | | a | | Lappula squarrosa (Retz.) Dumort. | | 105313 | |
| Lappula semiglabra (Ledeb.) Gürke | | a | | Lappula semiglabra (Ledeb.) Gürke | | 315390 | |
| Lappula echinata Gilib., nom. inval. | Lappula squarrosa (Retz.) Dumort. | | | Lappula echinata Gilib., nom. inval. | Lappula squarrosa (Retz.) Dumort. | 315394 | 105313 |
| Lappula myosotis Moench | Lappula squarrosa (Retz.) Dumort. | | | Lappula myosotis Moench | Lappula squarrosa (Retz.) Dumort. | 315395 | 105313 |
| Lappula occidentalis (S. Watson) Greene | | a | | Lappula occidentalis (S. Watson) Greene | | 316717 | |
| Lappula occidentalis (S. Watson) Greene var. cupulata (A. Gray) L. C. Higgins | | a | i | Lappula occidentalis (S. Watson) Greene var.cupulata (A. Gray) L. C. Higgins | | 316957 | |
| Lappula spp. | | a | | Lappula spp. | | 317064 | |
| Lappula redowskii (Hornem.) Greene var. texana (Scheele) Brand | Lappula occidentalis (S. Watson) Greene var. cupulata (A. Gray) L. C. Higgins | | i | Lappula redowskii (Hornem.) Greene var.texana (Scheele) Brand | Lappula occidentalis (S. Watson) Greene var.cupulata (A. Gray) L. C. Higgins | 317293 | 316957 |
| Lappula texana (Scheele) Britton | Lappula occidentalis (S. Watson) Greene var. cupulata (A. Gray) L. C. Higgins | | | Lappula texana (Scheele) Britton | Lappula occidentalis (S. Watson) Greene var.cupulata (A. Gray) L. C. Higgins | 317294 | 316957 |
| Lappula occidentalis (S. Watson) Greene var. occidentalis | | a | i | Lappula occidentalis (S. Watson) Greene var.occidentalis | | 318336 | |
| Lappula redowskii (Hornem.) Greene var. occidentalis (S. Watson) Rydb. | Lappula occidentalis (S. Watson) Greene var. occidentalis | | i | Lappula redowskii (Hornem.) Greene var.occidentalis (S. Watson) Rydb. | Lappula occidentalis (S. Watson) Greene var.occidentalis | 318337 | 318336 |
| Lappula venusta Piper | Hackelia venusta (Piper) H. St. John | | | Lappula venusta Piper | Hackelia venusta (Piper) H. St. John | 400754 | 400753 |
| Lappula arida Piper | Hackelia diffusa (Douglas ex Lehm.) I. M. Johnst. var. arida (Piper) R. L. Carr | | | Lappula arida Piper | Hackelia diffusa (Douglas ex Lehm.) I. M. Johnst. var.arida (Piper) R. L. Carr | 460389 | 460387 |
| Lappula cottonii Piper | Hackelia diffusa (Douglas ex Lehm.) I. M. Johnst. var. cottonii (Piper) R. L. Carr | | | Lappula cottonii Piper | Hackelia diffusa (Douglas ex Lehm.) I. M. Johnst. var.cottonii (Piper) R. L. Carr | 460390 | 460388 |
| Lappula micrantha Eastw. | Hackelia micrantha (Eastw.) J. L. Gentry | | | Lappula micrantha Eastw. | Hackelia micrantha (Eastw.) J. L. Gentry | 466016 | 466015 |
| Lappula cusickii Piper | Hackelia cusickii (Piper) Brand | | | Lappula cusickii Piper | Hackelia cusickii (Piper) Brand | 476315 | 476314 |