Pl.end.cr. 1. FILICES. 4. Aspidium. 9 



8. Aspidium fragrans. Fragrant shieldfern. 

 Frond pinnate ; pinnce lanceolate, close together, deeply 



cut ; lobes oblong, obtuse, dentate ; sori contiguous ; stipes 

 and mainrih very chaify. 



Polypodium fragrans, Huds. Fl. Atig, 457. 

 Aspidium fragrans, Swartz Syn. Fil. 51. 

 Sweet polypody. 



Moist chinks in rocks; perennial; July to September. 



9. Aspidium spimdosum. Thorny shieldferti. 

 Frond bipinnate; Leaflets oblong, decurrent, confluent, 



inciso-dentate ; lobes mucronato-serrate ; stipes chaffy ; invo-^ 

 lucra glandular. 



Filix pumila saxatilis altera, Pluk. Aim. 151, 

 Polvpodium spinulosiim, Retz. Prodr. 250. 

 Polystichum spinulosum, Roth Germ. 3,91. 

 Aspidium spinulosum, Swartz Syn. Fil, 51. 



Bogs ; Perennial ; June, July. 



Frond 1 foot high, long stemmed, subovate, light green, 

 smooth, thin, nearly transparent; sori small, distant, placed 

 towards the axillae of the leaflets ; involucra circinate, split 

 on one side. 



10. Aspidium palustre. Marsh shieldfern. 

 Frond pinnate; pinnce linear-lanceolate, pinnatifid, 



smooth ; lobes ovate, acute, not notched ; sort marginal, at 

 first contiguous ; afterwards confluent. 



Filix mas q. F. minor palustris repens, Raii Syn, 122,7. 



Dryopteris, Ger. em. 1135. 



Dryopteris seu Filix querna repens, Park. 1041. 



Acrosticluim Thelypteris, Lin. S. P, 1528. 



Polypodium Thelypteris, Lin. Mant. 505. 



Polystichum Tlielypteris, Roth Germ. 3,77. 



v^spidium Thelypteris, Swartz Syn. Fil. 50. 



Aspidium palustre, Sal. Prod, 4:20. 



Creeping water fern. 



Marshes ; perennial ; July. 



Frond upright 1-2 feet high, lanceolate, pleasant, green ; 

 stipes smooth ; /oZ;e5 subcrenate at the tip, the lov^^er ones 

 crossing in pairs ; sori numerous, and when ripe covering 

 the whole surface ; mainrib very smooth ; partial ribs rather 

 hairy. 



V. 5. CYCLOPTERIS. Schrader. Cupfern. 



Sori in round scattered spots; involucra sharppointed, 

 opening completely from tip to base, becoming reflexed. 



Cyclopteris fragilis. Brittle aipfern. 



Frond bipinnate ; leaflets oblong obluse, inciso-serrate ; 

 serratures obtuse, denticulate ; mainrib winged. 



