320 CHARACTERS OF TRIBES AND GENERA. 
dum, Presl. When the ultimate segments are small, the 
sori are short, and become characteristic of certain Davallee — 
of authors, which Mr. Moore has characterised as a distinct 
genus under the name of Lozoscaphe, but as the habit of 
these species is clearly indicative of their affinity being 
with the present group, I consider them as a section of 
Asplenium, as follows. 
The principal character that entitles them to rank as a 
genus, consists in the sori being very short and oblique, 
with the indusium conniving with the margin of the seg- 
ment, which gives it the appearance of a round cyst open- 
ing outwards as in Davallie, which is the only character 
that gives it any claim of relationship with that family. 
8. GresERosUM Group (Lozoscaphe, Moore). 
A. gibberosum, J. Sm. (Davallia, Sw.); A. concinnum, 
J. Sm. (Davallia, Schrad.) ; A. Schimperi, J. Sm. (Davallia, 
Hook); A. theciferum, J. Sm. (Davallia, H. B. K.); A. 
fceniculaceum, H. B. K. 
9. AnrNTUM-NIGRUM Group (Tarachia, Pr.) 
Fronds bi-tripinnate; ultimate segments or lacinæ with two ` 
or more sori, 
A. Adiantum-nigrum, Linn. (v v.) ; A. lanceolatum, Huds. 
(v v.) ; A, acutum, Bory. (v v.); A. auritum, Sw. (v 1373 
A. dispersum, Kunze (v v.) ; A. macilentum, Kunze (v v.) i 
A. fragrans, Sw. (v v.) ; A. mexicanum, Mart. et Gal. (v el 
10. Fatcarom Group (Tarachia, Pr.). 
Fronds pinnate ; pinnæ 1 to 6 inches long, lanceolate or ellip- 
tical, acuminate or sub-deltoid, entire, serrated or erosely 
laciniated ; veins forming an acute angle with the costæ. — 
A. attenuatum, R. Br. (v v.); A. longissimum, Blume ` 
(v v.); A. nitens, Sw. (v v.) ; A. serra, Lang. et Fisch. 
