136 V CHARACTERS OF TRIBES AND GENERA. ` Tm 
Peecilopteris, but differs in its erect fasciculate vernation, 
and in the fertile segments being involute. 
Sp. S. aurita (Blume Fil. Jav., t. 1) (v v.) (Polybotrya 
cieutaria, BL). : 
52.—Pacitopreris, Presl. (1836). 
Aerostichum sp. auct., Hook. Sp. Fil. 
Vernation uniserial, sarmentum short or elongated. 
Fronds contiguous or distant, pinnate, 1 to 3 feet long, 
bulbiferous. Primary veins costeform, pinnate, venules 
arcuately or angularly anastomosing, producing on their 
exterior sides or angles one or more free or anastomosing 
veinlets, forming unequal areoles. Fertile pinne some- 
times scarcely contracted, the venules then distinctly 
sporangiferous. 
Type. Acrostichum punctulatum Linn. 
Illus. Hook. and Bauer, Gen. Fil, t. 75, B ; Moore Ind. 
Fil., p. 7; J. Sm. Ferns Brit. and For., fig. 42. 
Oss.—The various and very different states exhibited by 
this genus has led not only to the forming of many species, 
but also to genera having been founded on different states 
of the same species, chiefly on the variations of the fertile 
frond being more or less contracted. i 
In some fronds of the same species the contraction of 
the fertile pinnæ is often very little, the venation is then 
more or less evident, and are then distinctly sporangiferous, 
forming linear anastomosing sori; this state constitutes | 
the genus Jenkinsia of Hooker, figured and described in — 
. Hook. and Bauer's Gen. Fil., t. 75, B, which in some cases E 
1 scarcely differs from Meniscium or Stegnogramma, and with ` 
which Pecilopteris agrees in habit, differing only in the e? 
veins of the sterile fronds being more compound anastomosed | 
