CHRISTENSEN: TROPICAL AMERICAN DRYOPTERIS 97 
Roland Bonaparte, collected near Morelia, Michoacan, by 
F. Arséne. The type specimen is from Morelos, gaa 
above Cuernavaca, 5,500 ft., Pringle 6190 (U. S. National 
Herbarium), which specimen belongs to a more fully de- 
veloped form than Pringle 8846, to which the name was 
originally applied. I have seen several other ncReeeS 
in various herbaria. 
D. Mazoni is a very distinet species, seihape most 
closely related to the Californian D. rigida arguta Und. 
‘It is especially well marked a its large indusia, but the 
thick, straw-colored, somewhat fleshy stipe and rachis 
are also very characteristic. From D. patula it can be 
listinguished at once by the ane pinnae and pin- 
nules and the broad segments. In the indusial charac- 
ter it resembles the next species, which, however, is —_ 
different in habit and pubescence. 
40. D: rmemaearias (Mett.) O. Ktze. [For synonymy 
e C. Chr. Ind. 292. 1905.] 
A ue! finely cut species. The whole leaf is 
densely clothed with unicellular, cylindrical, short “hairs. 
The indusium is large and conceals perfectly the spor- ce 
angia. Known from Mexico, —— and Ni ICAFAZUA. 
pedal seg 1911. Sere Wee as 
