Stable identifiers http://herbarium.bgbm.org/object/B200143174
Herbarium # B 20 0143174
Collection # B-Pteridophyta
Stored under taxonname Selaginella densa Rydb.   tropicos
IPNI (K) Plants of the World Online / POWO (K)
GBIF
Family Selaginellaceae
Det./rev./conf./assigned R. M. Tryon 1952
Ident. history G. Hieronymus: Selaginella haydeni; R. M. Tryon 1952: Selaginella densa
Lectotypus of Selaginella haydenii Hieron.
Typified by: R.M. Tryon 1952
Collector wikidata Index of Botanists (HUH) VIAF Bionomia Hayden,F.V. 2 ? (link to CETAF Botany Pilot) 
Date s.d.
Location USA
Label Flora Nebrasca.
Habitat
Habitus
Annotations com. Engelmann