662 GENERA OF FERNS. 
appearing to me to belong to this genus. Presl also quotes 
Cyathea Mexicana, as having medial sori; but the individuals 
of that species that have come under my observation exhibit 
axillary sori, and do not differ in habit from true Cyathee. 
120. HEMITELIA, R. Br., J. Sm. 
(Cyatheze Sp. Auct., Cnemidaria, Presl.) 
Veins simply or pinnately forked, the lower pair of venules 
(of the lowest fascicles) oppositely anastomosing, forming an 
angular costal arch, the superior venules all free. Sor? medial. 
Indusium semicalyciform, interiorly attached. Receptacle 
globose. 
Fronds bipinnatifid, smooth, or aculeate, or squamiferous ; 
lacinie obtuse or lanceolate. broad, slightly falcate. Sori 
uniserial, sub-marginal, or irregular. Andusium becoming re- 
flexed, lunulate. 
Species. 1. H. speciosa, Kaulf. 2. H. grandifolia, Spreng, 
(Cnemidaria Kohautiana, Presi.) 3. H. obtusa, Kaulf. 4- 
H. horrida, R. Br. 5. H. serrata, J. Sm. 6. H. monilifera, 
J. Sm. 7. H. marginalis, J. Sm. 
Obs. The name and technical character of this genus were 
first pointed out by Mr. Brown, and that learned author 
quotes certain species as constituting the genus, which, with 
other allied ones, 1 have duly examined ; and, as in the case 
of Schizocena I find it will be necessary, in conformity to 
my views of this arrangement, to remove two of the species, 
quoted by tl igi lauthor,tothe sub q tgenus Alsophila, 
as characterized by me. I consider myself justified in doing s0, 
not only on account of their distinct habit, but also because of 
the difference in venation. In true Hemitelie of Mr. Brown, the 
lower venules anastomose, forming an angular arch between 
the midrib of each two proximate lacinie ; while in Hemitelia 
is and multiflora, of that author, the venation is all free 
and coincides in every respect, as does the habit, with the 
subsequent genus Alsophila. However, it is to be noticed 
at although H. serrata possesses the true habit of the 
