4 CARL CHRISTENSEX AND CARL SKOTTSBERG 



foliis atroviridibus, planis, glabris, lanceolatis, maximis vix 5 cm longis et 1 cm 

 latis, stipite 1 — 1,5 cm longo, e medio sursum anguste alato, rhachide tota 

 alis sub 0,5 mm latis utrinque alata. Lamina bipinnatifida, pinnis 5 — 6-jugis, 

 alternis, suberectis, infimis paulo abbreviates, mediis 5 — 8 mm longis, inaequi- 

 lateralibus, basi superiore segmentum soriferum gerentibus, parte exteriore in 

 2 — 4 segmenta sterilia contigua subtruncata vel leviter emarginata divisis. Mar- 

 ginibus, praesertim versus apicem, minutissime et irregulariter crenato-dentatis. 

 Venis distinctis, spuriis nullis. Cellulis parenchymaticis parvis, irregularibus, 

 4 — 6-angulatis, fere isodiametricis parietibus crassis, hyalinis. Soris singulis 

 axillaribus, rarissime binis in pinna, tubo cylindrico anguste marginato, ore in- 

 tegro vel levissime emarginato, paulo expanso; receptaculo exserto. 



Fig. 2. 



In moss mats on stones and on the ground, in dense forests, rare. (Fertile 

 Aug. — Dec.) 



Fig. 2. Trichomanes Ingae C. Chr. a two fronds, uat. size; b fragment, X 2 1 /?, c sorus and 



d tip of sterile pinna, more enlarged. 



Masatierra, central part: V. Anson, XE. slope of El Yunque, 300 m 

 (no. 162), in the same place where it was found in 1908; XE. slope of La 

 Damajuana, c. 450 m; V. Colonial, O Gutierrez (no. 68). — Found before only 

 by MOSELEY and by SKOTTSBERG, 1908. 



This new species, named in honour of Mrs. INGA SKOTTSBERG, belongs 

 to a number of closely related species which by most authors are united under 

 the name T. pyxidiferum L. Convinced of this being a collective species that 

 includes several valid ones, a number of which have already been described 

 by VAX DEN BOSCH, we have tried, but without success, to identify the Juan 

 Fernandez form with one or other of the forms from the American continent. 

 Our new species differs greatly from the true West Indian T. pyxidiferum by 

 its much less divided lamina and by its dark colour; in these characters it 

 approaches some South Brazilian forms, especially T. emarginatum Pr., but it 

 differs from these as well as from all other forms known to us by its cellular 

 structure and its uneven margins. The cells are proportionally very small, 

 very unequal in size and seldom longer than broad; by this structure the leaf 

 becomes much firmer than in all other forms without spurious veins. Seen 



