Lycopodium

1. Peduncles mostly with 2–3 (–4) clearly pediceled strobili, pedicels of individual lateral strobili (2–) 4–20 (–45) mm long.

L. clavatum

1. Peduncles with 1–2 strobili, if paired, then strobili essentially sessile.

L. lagopus

All species found in Lycopodium

Lycopodium clavatumRUNNING GROUND-PINE 
Lycopodium lagopusRUNNING GROUND-PINE 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://michiganflora.net/genus.aspx?id=Lycopodium.