OF ARTS AND SCIENCES. 187 



Pell^a rigida, Hooker. On the route from San Luis Potosi to 

 Tampico (1156 Parry & Palmer), and at Orizaba (40 Mohr). 



Pell^ea Seemanni, Hooker. Fronds larger and more compound 

 than shown in Hooker's figure, but otherwise well agreeing with the 

 character of the species. In the Morales Mountains (923 SchafFner) ; 

 979 Parry & Palmer. 



Pell^a atropurptjrea, Link. At Georgetown, Texas (1425), 

 and (without number) in the Caracol Mountains, and near Saltillo, 

 Coahuila. 



Pell^a aspera, Baker. In the mountains northeast of Monclova, 

 Coahuila (1422) ; also collected sparingly in Southwestern Texas. 



Pell^a pulchella, Fee. At Soledad (1423), and at Lerios 

 (1424). 



Pell^a marginata", Baker. In the San Miguelito Mountains 

 (921 Schaffner), and San Rafael Mountains (922 Schaffner, a smaller 

 form) ; 983 Parry & Palmer. 



Pell^a terxifolia, Link. In the Escobrillos Mountains (924 

 Schaffner) ; 982 Parry & Palmer. 



Pell.ea cordata, J. Smith. Fine typical specimens, with broad 

 orbicular-cordate pinnules, were gathered in the region of San Luis 

 Potosi by Parry & Palmer (980) ; in the mountains of San Rafael 

 (959 Schaffner), a form with narrower pinnules; near Saltillo, Coa- 

 huila (1426, 1427), a form with still smaller pinnules, evidently pass- 

 ing into the New Mexican and Arizona plant formerly referred to 

 P. androinedcefoUa, var. pubescens, but which Mr. Davenport thinks 

 should rather be joined with this species. 



Pell^a flexuosa, Link. In Uvalde Canon, Texas (1428), also 

 without number from Soledad and Monterey, and in the San Miguelito 

 Mountains (958 Schaffner). This is made a variety of the last species 

 by Mr. Baker, but in well-developed fronds the zigzag habit is very 

 conspicuous, and it is perhaps as well to keep the two apart. 



Llavea cordifolia, Lagasca. At Guajuco, Nuevo Leon (1375). 



Pteris aquilina, Linn. In Wilson Co., Texas (1429). — Var. 

 lanuginosa, Bongard. In the San Miguelito Mountains (925 

 Schaffner) . 



Adiantum Capillus-Veneris, Linn. At Saltillo, and San Lo- 

 renzo de Laguna, Coahuila (1430, 1431), and in the mountains of 

 Morales and San Rafael (930, 932 Schaffner) ; 977 Parry & Palmer, 

 in part. 



Adiantum thalictroides, Willd. In the San Miguelito Mount- 

 ains (931 Schaffner) ; 977 Parry & Palmer, in part. This is a very 



