SSC 
870 CHARACTERS OF TRIBES AND GENERA. 
pinnæ about half an inch in length, differing from true 
Lindsea only in the upper margin, being dentate, each dent 
bearing a single round terminal sorus, furnished with a 
'bilabiate indusium, upon this character, Bory refers it to 
Dicksonia, in which genus it is retained by Swartz and 
Willdenow, along with the arborescent Dicksonia ; it was 
afterwards referred by Desvaux to Davallia, under which 
genus it stands in the “ Species Filicum ” (sect. Odontoloma) ; 
which is certainly a more natural position than being ranked 
with the lofty Dicksonias. Presl places it in the genus 
Saccoloma. In Moore’s Index it is found under the genus 
Acrophorus (A. repens), which genus was originally founded 
by Presl on a solitary species*, to which Moore adds no less 
than eighteen species, the greater number of which in this 
arrangement come under four distinct genera, namely, ` 
Odontoloma, Odontosoria, Microlepia, and Leucostegia, the — 
latter differing from the former in having articulate verna- 
tion, and, therefore, belonging to Hremobrya. To depend 
on the character of the sori alone, many multifid species of — 
Lastrea and Polystichum, with terminal, marginal sori, and 1 
even Mr. Moore's genus, Diclisodon, may be added to — 
Aerophorus, all agreeing strictly in the sori being terminal, 
and the special indusium conniving with the indusoid mar- 3 
gin. lt is, therefore, only by studying the difference in 
habit that natural groups of species can be formed. 
151.—Sonizorowa, Gaud. (1826). 
Lindsea, Hook. Sp. Fil. 
 Vernation sarmentose, short. Fronds contiguous, sub- 
fasciculate, pinnate; pinnw oblong, or linear lanceolate, 
coste central, Veins forked ; venules anastomosing, form- 
* See Acrophorus, page 221, 
