PL end . cr. 
9 
1. FILIGES. 4. Aspidium. 
8. Aspidium fragrans. Fragrant shieldfern . 
Frond pinnate ; pinnce lanceolate, close together, deeply 
cut ; loles oblong, obtuse, dentate ; sori contiguous ; stipes 
and mainril very chaffy. 
Polypodium fragrans, Buds. FI. Ang. 457. 
Aspidium fragrans, Swartz Syn. Fit. 51. 
Sweet polypody. 
Moist chinks in rocks ; perennial ; July to September. 
9. Aspidium spinuhsum . Thorny shieldfern . 
Frond bipinnate; leaflets oblong, decurrent, confluent, 
inciso-dentate ; loles mucronato-serrate ; stipes chaffy ; invo- 
lucra glandular. 
Filix pumila saxatilis altera, Pluk. Aim. 151. 
Polypodium spinulosum, Relz. Prodr. 250. 
Polystichum spinulosum, Roth Germ. 3,91. 
Aspidium spinulosum, Swartz Syn. Fil. b\. 
Bogs; Perennial; June, July. 
Frond 1 foot high, long stemmed, subovate, light green, 
smooth, thin, nearly transparent; sori small, distant, placed 
towards the axillse of the leaflets ; involucra circinate, split 
on one side. 
30. Aspidium palustre. Marsh shieldfern. 
Frond pinnate; pinnce linear-lanceolate, pinnatifid, 
smooth ; loles ovate, acute, not notched ; sori marginal, at 
first contiguous ; afterwards confluent. 
Filix mas q. F. minor palustris repens, Rail Syn. 122,7. 
Dryopteris, Ger. em. 1135. 
Dryopteris seu Filix querna repens, Park. 1041. 
Acrostichum Thelypteris, Lin. S. P. 1.528. 
Polypodiiun Thelypteris, Lin. Mant. 505. 
Polystichum Thelypteris, Roth Germ. 3,77. 
Aspidium Thelypteris, Swartz Syn. Fil. 50. 
Aspidium palustre, Sal. Prod, 420. 
Creeping water fern. 
Marshes ; perennial ; July. 
Frond upright 1--2 feet high, lanceolate, pleasant green; 
stipes smooth ; loles subcrenate at the tip, the lower ones 
crossing in pairs; sori numerous, and when ripe covering 
the whole surface; mainril very smooth ; partial ribs rather 
hairy. 
V. 5. CYCLOPTER1S. Schrader. Cupfern. 
Sori in round scattered spots; involucra sharppointed, 
opening completely from tip to base, becoming reflexed. 
Cyclopteris fragilis . Brittle cupfern. 
Frond bipinnate ; leaflets oblong obluse, inciso-serrate ; 
serratures obtuse, denticulate ; mainril winged. 
