You selected Lycopodium clavatum var. monostachyon Grev. & Hook. This is a synonym for:

Accepted scientific name:
Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen (accepted name) 1 literature reference for Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen
Synonyms:
Lycopodium clavatum var. brevispicatum Peck (synonym) 2 literature references for Lycopodium clavatum var. brevispicatum Peck
Lycopodium clavatum var. integerrimum Spring (synonym) 2 literature references for Lycopodium clavatum var. integerrimum Spring
Lycopodium clavatum ssp. megastachyon (Fern. & Bissell) Selin (synonym) 2 literature references for Lycopodium clavatum ssp. megastachyon (Fern. & Bissell) Selin
Lycopodium clavatum var. megastachyon Fern. & Bissell (synonym) 2 literature references for Lycopodium clavatum var. megastachyon Fern. & Bissell
Lycopodium clavatum ssp. monostachyon (Grev. & Hook.) Seland. (synonym) 2 literature references for Lycopodium clavatum ssp. monostachyon (Grev. & Hook.) Seland.
Lycopodium clavatum var. monostachyon Grev. & Hook. (synonym) 2 literature references for Lycopodium clavatum var. monostachyon Grev. & Hook.
Infraspecific taxon: Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen
Common names: -
Classification:
Plantae
Phylum Lycopodiophyta
Class Lycopodiopsida
Order Lycopodiales
Family Lycopodiaceae
Genus Lycopodium
Distribution: North America
Additional data: -
Source database: ITIS, Sep 2009
Latest taxonomic scrutiny: Kartesz J., 15-Mar-2000
Online resource: http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=507548
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:24dfb3a4-60a7-102d-be47-00304854f810:ac2010