266 TBICHOMANES BREVISETUM. 
TRICHO'MANES BREVISETUM. 
THIS has been commonly included in the genus Tri- 
chomanes, but with the various specific names of ra- 
dicans, speciosum, Europaum, alatum, pyxidiferum, Tun- 
bridgense, var. 3, and Andrewsii. By a few botanists it 
has been called Hymenophyllum alatum, Hymenopliyllum 
Tunbridgense, /3, and Didymoglossum alatum. In English 
it is known as the Short-styled Bristle Fern, and Gup- 
Ooldy-locTcs 
Root very thick, cylindrical, creeping, black, densely 
hairy, with numerous stout, scattered, branched, ver- 
tical rootlets. Fronds issuing singly, irregularly, from 
^the upper side of the root; erect, from five to twelve 
inches high, dark, transparent green, narrow egg-shaped 
in general outline. Stem winged, and from one-fourth 
to one-half bare of leaflets. Leaflets with two leafits 
at their base, and their upper portion irregularly but 
alternately lobed. Both leafits and lobes cut into deep, 
blunt segments. A few of the upper segments end in 
a single, imbedded, oblong, cylindrical cup, continued 
from the leaf, slightly winged at the sides. Fructifi- 
cation round the bottom of a little column in that cup. 
This very rare Fern is found in watery places, and on 
wet rocks. 
In England it has been found at the head of Elm 
Crag Well, at Belbank, half a mile from Bingley, York- 
shire. 
