| Name | Nama serpylloides var. confertum I. M. Johnston | 
| Authorship | I. M. Johnston | 
| Rank | Variety | 
| Placed in | Nama serpylloides A. Gray | 
| Citation | 1943 J. Arnold Arbor. 24(1): 96 | 
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Nama serpylloides var. confertum I. M. Johnston | 
| Identification made in | [no date] (1), 2016 (1) |