i8 FIELD COLUMBIAN MUSEUM BOTANY, VOL. 2. 



this species. Swartz kept them apart, and the figure in Rhede's Hort. 

 Malab. t. 17, on which Linnaeus based his species, might very well 

 stand for a much larger and different fern than our A. molle. 



Moist banks at Caguas, Porto Rico (243) and on the mountain 

 above Charlotte Amalia, St. Thomas (540), No. 540 is a fine specimen 

 with caudiciform rootstock. 



ASPIDIUM PATENS Swtz. Syn. Fil. 49. 



Nephrodium Desv. , Dryopteris Ktze. Clefts of a ruined cellar 

 wall on an islet in the bay of Hamilton (23) and in the water of a bog 

 at Paget's (55) Bermuda. Exposed rocks of a railway cut at Bayamon, 

 Porto Rico (344, 350), both juvenile. Mountain road in deep woods 

 above Charlotte Amalia, St. Thomas (542). Roadside (887) and moist 

 rocks (901, 904, 906, 932, 954, 1131) near Port Antonio, Jamaica. 

 Crevice of the masonry in the throat of an old well at Georgetown, 

 Grand Cayman (1399) one individual only. Deep woodland, center 

 of the island of Cozumel (1561), rare. 



This set forms a most interesting and valuable series of forms in 

 all stages of development, some of which would be difficult to sep- 

 arate from A. molle but for the creeping rootstock. 



ASPIDIUM CICUTARIUM (L.) Swtz. Syn. Fil. 51. 



Polypodium Linn. Sagenia Presl, "veins arcuate by anastomos- 

 ing." Nephrodium Baker, Dryopteris Ktze. 



Rich soil in a deeply shaded glen near Port Antonio, Jamaica 

 (1132). A single imperfect but quite characteristic frond of this fine 

 species. 



NEPHROLEPIS ACUTA (Schkr.) Presl. Pterid. 1836. 



Aspidium Schkr. Sterile plants of a strongly pubescent form, 

 found in rich soil under an overhanging bank (909), and full fruited 

 tall form in a shady ravine (1000) near Port Antonio, Jamaica. 



NEPHROLEPIS EXALTATA (L.) Schott Gen. Fil. 1834. 



Polypodium Linn. Walls of a ruined cellar on an islet in the bay 

 of Hamilton (22), and on an island in a bog at Paget's (59), Bermuda. 

 Wooded hillside in a glen near Port Antonio, Jamaica (916, 1141). 

 On a hummock in an upland swamp, center of the island of Grand 

 Cayman (1376). 



Although the above specimens vary greatly in size, they fail to 

 present characters that might enable me to separate them. 



DAVALLIA ACULEATA (L.) Smith. Mem. Acad. Turin 5: 415. 



Adiantum Linn. Rich soil under the trees of a Guava orchard 

 near Port Antonio, Jamaica (1142). 



ASPLENIUM DENTATUM Linn. Sp. PI. 1540. 



On stone fences under the shade of trees (893) near Port Antonio 

 Jamaica. 



These specimens have the pinnae much closer than in our slen- 

 der Florida form, and are quite unlike the species as mostlyknown to 

 American botanists; they however fit well the fine series of forms in 



