Trichomanes.~\ 
riLICES. 
465 
5. T. flabellatum, Bory ; Hoolc. and Baker, Syn. Fil. 76. Root- 
stock filiform. Stipe wiry, |-f in. long. Frond semicircular or 
cuneate-deltoid, in. broad, flabellately cut into many close 
dichotomous segments ^ in. broad, which have a distinct midrib, but 
no veiniets. Sori 2-4 to a frond, at the end of central segments. 
Involucre immersed, turbinate, with two distinct semicircular denticu- 
late lips. T. sibthorpioides, Bory. Hymenophyllum sibthorpioides. 
Mett. ; Kuhn , Fil. Afr. 41. 
Mauritius, teste Kuhn. We have it from Bourbon, Madagascar, and Johanna 
Island, but not from Mauritius. Probably this is Bojer’s T. parvulum, found at the 
cascades of the Black River and the wood of Savanne, but we have not authentic 
specimens. The true T. parvulum , which is found in Bourbon, has shorter stipes and 
an involucre with a broad spreading collar-like limb. 
6. T. trinerve, Baker. Rootstock filiform. Stipe terete, | 
in. long. Frond i in. broad, bright green, cuneate-deltoid, cut into 
4-6 close ligulate lobes i n - hroad, each with a distinct midrib and 
distinct vein on each side. Sori 1-3 to a frond, placed at the end 
of the central lobes. Involucre funnel-shaped, immersed at the base 
only, with a large spreading obscurely two-lipped collar-like limb. 
Mauritius, at the Tamarin cascade, with T. BarJclianum, Sir H. and Lady 
Barkly ! Dr. Meller ! Endemic. Closely allied to the West African T Mannii. 
7. T. bipunctatum, Poir. ; Kuhn , Fil. Afr. 32. Rootstock fili- 
form, wide-creeping, tomentose. Stipe \-l in. long, winged at the top. 
Frond oblong-lanceolate or oblong-deltoid, 2-3 in. long, about an inch 
broad, tripinnatifid, with the rachis winged throughout. Pinnae 
lanceolate, cut away on the lower side at the base. Ultimate segments 
close, erecto-patent, strap-shaped, •£-• £ in, long, in. broad, with a 
central midrib and usually no other vein. Sori 1 or more to a pinna, 
especially on the lowest lobe. Involucre funnel-shaped, winged, with 
two very distinct lips. T. Filicula, Bory ; Hook . and Baker , Syn. 
Fil. 81. 
Mauritius, in woods of the Savanne and Pouce ranges. T. depauperatum, Bojer, 
Hort. Maur. 410, probably belongs here, hut I have not seen authentic specimens. 
Through the tropics, principally of the Old World. 
8. T. pyxidiferum, Linn. ; Hook, and Baker , Syn. Fil. 81. General 
habit and cutting exactly of T. hipunctatum , but the involucre with a 
spreading subentire collar-like limb. T. borbonicum, F. L). B.j Kuhn y 
Fil. Afr. 33. T. melanotrichum, Schlecht.j Kuhn , Fil. Afr. 35. 
Gathered in Mauritius, according to Kuhn, hut I have not seen a specimen. 
Round the world in tropical and subtropical regions. We have it from Bourbon and 
Johanna Island. 
9. T. rigid-urn, Swartz ; Hook, and Baker , Syn. Fil. 86. Root- 
stock woody, suberect or short-creeping, densely clothed with minute 
