20 Field Columbian Museum Botany, Vol. 2. 



firmly adherent, and are mostly attached to the pedicel by a "short 

 y-shaped furcation," as described by Moore, while in Mr. Gilbert's 

 specimens of the variety, as well as in these of Dr. Millspaugh, there 

 is at least a partial articulation as seen in the falling away of some 

 deciduous pinnules, and the leaving behind of either a blunt apex, 

 or a very short one-sided attempt at furcation. 



Adiantum cristatum Linn. Sp. PI. 1558. 



Moist hillsides near Bayamon, Porto Rico (356). 



Adiantum deltoideum Swtz. Prod. 134. 



In the crevices of the dry walls of Diego Columbus' Castle, San 

 Domingo (769). In a like situation on the walls of Morro Castle 

 (1096, 1 107, 1 108), Santiago de Cuba; the latter station producing 

 especially large and fine plants. 



-/ 

 Adiantum obliquum intermedium (Swtz.) Shimek, Ferns Nic. 145. 



A. inter?nedium Swtz. Prof. Shimek (1. c. pp. 142-145, pi. 6-7) 

 has, it seems to me, by an admirable series of figures, shown quite 

 clearly the difficulty of keeping A. intermedium, A. Kaulfussii Kunze 

 and A. obliquum H. & G. longer apart, and my own series of speci- 

 mens, and the following plants, certainly appear to confirm his judg- 

 ment. 



Deep rich woods on the mountain back of Charlotte Amalia, St. 

 Thomas (549), and in rich shady woodlands near Port Antonio, Ja- 

 maica (1 146). 



Adiantum pulverulentum Linn. Sp. PI. 1559. 



~j Rocky well-shaded ravine (907), moist deep glen (1 134, 1147) and 

 under a moist overhanging bank (1788) near Port Antonio, Jamaica. 

 This whole series shows much variation, while 1788 has some 

 sterile fronds greatly resembling A. obliquum intermedium. 



Adiantum tenerum Swtz. Prod. 135. 



On dry rocks east of the river near San Domingo City (811), and 

 in rich soil of a shaded glen near Port Antonio, Jamaica (905). 



The specimens plainly show that the latter situation is the health- 

 ier for this species, for while the plant is fresh and clean, retaining 

 its leaflet, the former is dry and has hardly a leaflet remaining on its 

 depauperate stems. 



Pteris aquilina Linn. Sp. PI. 1533. 



On a hummock in a bog near Paget's, Bermuda (57). 



The segments of this form are narrow, and the plant approaches 

 variety caudata, but is only slightly pubescent. 



Pteris aquilina caudata (L.) Hooker, Spec. 2:1858. 



P. caudata Linn. In open moist woods in the center of the 

 island, Cozumel (1551, 1565), where it is called X-ual-kanil, "yellow 

 fly-brush," probably from its use for the purpose of keeping off flies. 



Pteris longifolia Linn. Sp. PI. 1531 . 



Rich, moist soil on hillsides near Bayamon, Porto Rico (310). 



