OP ARTS AND SCIENCES. 463 



densely scaly with entire cordate-ovate brown imbricated scales, which 

 cover all but the lips of the lobes : sporangia submarginal. Near 

 Barranca, from dry and exposed places on mountain sides. (83.) — 

 This has fronds with something of the outline of N. Hookeri, but 

 rather smaller and more sharply deltoid. The copious cinnamon- 

 colored scales, contrasted with the orange powder and with the deep 

 green of the upper surface, give it a very peculiar appearance. Mr. 

 Baker's N. deltoidea, as described, must be a good deal like it in some 

 respects, but lacks the ceraceous powder. 



NoTHOL^NA Lemmoni, D. C. Eaton. Chapala, on walls and 

 among rocks on shaded hillsides. (701.) — Fine specimens; the 

 powder of the lower surface pure white. 



NoTHOL^NA Grayi, Davenport. Taken from the face of large 

 rocks in a cafion at Rio Blanco ; September. (555.) — Large speci- 

 mens, like Schaffner's 962. 



NoTHOL^NA Palmeri, Baker. Crevices of rocks in a deep canon 

 at Rio Blanco; September. (541.) — Differing in no respect from 

 the original specimens (991 Parry & Palmer), figured in Hooker's 

 Icones Plantarum, t. 1678. 



Pell^a rigida, Hooker. Rio Blanco, among rocks in shady 

 ravines; October. (729.) 



Pell^ea Seemanni, Hooker. Guadalajara, among rocks on shaded 

 hillsides ; July. (300.) Rio Blanco, on walls densely shaded by 

 Opuntias ; October. (732.) — These plants have more decompound 

 fronds and smaller segments than the original. No. 87 of the collec- 

 tion of 1885, which I liad taken for a smooth form of Cheilanthes 

 microphylla, is the same thing. 



Pelltea ternifolia. Link. Rio Blanco, in the crevices of shaded 

 rocks. (764). 



Pell^a angustifolia. Baker. Rio Blanco, on the shaded sides 

 of ravines ; July, August. (177, 306.) Also var. cuneata, Baker. 

 Tequila, in crevices of rocks. (358.) 



Pell^a marginata. Baker. Barranca, on shaded earth. (81.) 

 — Rio Blanco ; August. (307.) Also var. pyramidalis, Baker. 

 Rio Blanco; September. (761.) 



Pelljea cordata, J. Smith, var. ? A form with auriculate-hastate 

 pinnae, the fronds pinnate or sparingly bipinnate, which may perhaps 

 be best referred to this species. Rio Blanco, in ravines ; September. 

 (543.) 



Pell^a flexuosa. Link. Rio Blanco, on the tops of adobe 

 walls ; October. (731.) 



