108 AMERICAN FERN JOURNAL 
Vera Cruz: Region d’Orizaba, Escamela, 16 Aug., 
1866, Bourgeau 2894. 
Curapas, “ete.”’ 1864-1870. Ghiesbreght 227. 
OAXACA: as San Antonio, 1600 m., 20 May, 1906, 
Pringle & Conzatti 1395. 
It is interesting to note that in the ‘Reliquiae’’ 
Kuhn published Mettenian descriptions of three species 
of Pellaea—P. intermedia, P. glabella and P. microphylla. 
The first, after a brief period of obscurity, came into 
its own. The work of Mackenzie and Bush, Pickett 
and Butters has recently established P. glabella as be- 
yond question a distinct species. Now, with the gather- 
ing of more and better material, it is clear that P. 
microphylla must take its place beside them—no small 
tribute to the keenness of eye and good judgment of 
Mettenius in distinguishing species from meager mate- 
rial. 
I am much indebted to Mr. William R. Maxon for 
his courtesy in turning over to me certain of his notes 
on the two species here discussed, whose distinctness 
he had recognized independently and before me; and 
for reading the manuscript of this paper. 
EXPLANATION oF Piate 5. A. Pellaea microphylla, tip of frond 
Tr: 
frond <1. Figs. 5 and 6, fertile pinnules; fig. 7, young fertile 
pinnule; fig. 8, sterile — all X4. The figures of P. microphylla 
were drawn from Pringle 458; those of P. pulchella, fertile from 
Pringle & Conzatti iy sterile from Purpus 4882a. 
East Hartrorp, Conn. 
