498 GENERA OF FERNS. 
Fronds varying from simply pinnate to decompound-mul- 
tifid, smooth or aculeate segments often unisorous ; sporangia 
usually exserted beyond the open margin of the indusium; 
sporules oblong, reniform. 
Examp. 1. D. pentaphylla, Blume. 2. D. triloba, 
Willd. 3. e ornata, Wall. 4. D. e Sw. 5. D. ele- 
gans, Sw. 6. D. epiphylla, Sw. 7. D. pyxidata, Cav. 
SD. oke? Sw. 9. D. Gegen Sw. 10. D. du- 
mosa, Sw. 
lllust. Hook. et Bauer Gen. Fil. t. 27. Schk. Crypt. t. 127. 
Obs. The tubulose indusium readily distinguishes this 
beautiful genus ; but it contains a few species which have nar- 
row cuneate laciniz or dents, each bearing a short truncate 
sorus which is sometimes binate, and in that case presenting 
a relationship with Lindsea. 
The genus Stenolobus of Presl is founded upon the circum- 
stance of Schkuhr having represented the sporangia of Dav- 
allia solidaas being connate, or rather as if produced in a 
spike-like manner round a slender elongated vertical recep- 
tacle, analogous to the following genus Loxsoma; but on 
careful examination of many specimens of Davallia solida, as 
also other allied species, I find the sporangia furnished with 
long footstalks, which are all free, and rise from a small re- 
ceptacle in the bottom of the urceoles, and being numerous 
and crowded, a number of the sporangia prove abortive. 
— 
108. Loxsoma, R. Br. 
Veins simple or forked, direct, their apices free and spo- 
rangiferous; sori vertically oblong, exserted ; indusium in- 
flated, forming with the concave indusiiform margin a ver- 
tical urceolate cyst; sporangia pedicellate; pedicels united, 
forming an elongated exserted columnar receptacle; ring 
obli 
lique. 
Fronds deltoid, decomposite, glaucous beneath, laciniae 
lanceolate, dentate, the sinus soriferous; sporangiferous re- 
ceptacle exserted beyond the open margin of the indusium 
about twice its length; sporangia obovate, opening longi 
nally ; sporules triangular. 
