The Soldiers Delight Natural Environment Area, consists of about 1,900 acres (7.7 km²) of land in Baltimore County, Maryland, USA.^[1] [1] [2] Much of the area of the Soldiers Delight NEA contains a serpentine barren that contains a number of rare and endangered species of plants.[3] [4]

The following list of clubmosses, spikemosses, horsetails and ferns comes from the publications by [F] Fleming et al. 1995, [M] Monteferrante 1973, [R] Reed 1984, [We] Wennerstrom 1995, and the unpublished data by [Wo] Worthley 1955-1985.

Division Lycopodiophyta

Lycopodiaceae (Clubmoss Family)

• Diphasiastrum digitatum (L.) Holub - Northern running-pine, Flat-stemmed clubmoss, Ground cedar [We, Wo]
• Diphasiastrum tristachyum (Pursh) Holub - Blue clubmoss, Blue ground-cedar [Wo]
• Huperzia lucidula (Michx.) Trevisan - Shining firmoss, Shining clubmoss [Wo]
• Lycopodium clavatum L. - Stag's-horn clubmoss, Ground pine [Wo]
• Lycopodium obscurum L. - Groundpine, Tree clubmoss [We, Wo]

Selaginellaceae (Spikemoss Family)

• Selaginella apoda (L.) Spring - Meadow spikemoss [M, R, Wo]

Division Equisetophyta

Equisetaceae (Horsetail Family)

• Equisetum arvense L. - Common horsetail [R, Wo]
• Equisetum hyemale L. - Scouring rush, Rough horsetail [Wo]
• Equisetum sylvaticum L. - Wood horsetail [R] {G5, Si, E}

Division Polypodiophyta

Aspleniaceae (Spleenwort Family)

• Asplenium platyneuron (L.) BSP. - Ebony spleenwort [M, R, Wo]

Dennstaediaceae (Bracken Family)

• Dennstaedtia punctilobula (Michx.) T. Moore - Hay-scented fern [M, R, We, Wo]
• Pteridium aquilinum (L.) Kuhn - Bracken [R, Wo]

Dryopteridaceae (Wood fern Family)

• Athyrium filix-femina (L.) Roth ex Mertens - Lady fern [Wo]
• Athyrium filix-femina (L.) Mertens var. asplenoides (Michx.) Farwell - Southern lady fern [M]
• Cystopteris fragilis (L.) Bernhardi - Brittle fern, Bladder fern [Wo]
• Deparia acrostichoides (Swartz) M. Kato - Silvery Spleenwort [Wo]
• Dryopteris carthusiana (Villars) H.P. Fuchs - Spinulose shield fern, Narrow buckler fern [Wo]
• Dryopteris cristata (L.) A. Gray - Crested wood fern, Crested buckler fern [Wo]
• Dryopteris marginalis (L.) A. Gray - Marginal shield fern, Marginal wood fern [R, Wo]
• Onoclea sensibilis L. - Sensitive fern [Wo, We]
• Polystichum acrostichoides (Michx.) Schott - Christmas fern [M, R, We, Wo]
• Physematium obtusum (Sprengel) Torrey - Blunt-lobed woodsia [Wo]

Ophioglossaceae (Adder's-tongue Family)

• Botrychium virginianum (L.) Swartz - Rattlesnake fern [Wo]
• Sceptridium dissectum Sprengel - Dissected grapefern [Wo]

Osmundaceae (Royal fern Family)

• Osmunda cinnamomea L. - Cinnamon fern [M, Wo]
• Osmunda claytoniana L. - Interrupted fern [R, Wo]
• Osmunda regalis L. var. spectabilis (Willd.) A. Gray - Royal fern [Wo]

Polypodiaceae (Polypody Family)

• Polypodium virginianum L. - Common polypody [R, Wo]

Pteridaceae (Maidenhair fern Family)

• Adiantum pedatum L. - Northern naidenhair fern [Wo]

Thelypteridaceae (Marsh fern Family)

• Parathelypteris noveboracensis (L.) Nieuwland - New York fern [Wo]
• Phegopteris hexagonoptera (Michx.) Fée - Broad beech fern [R]