108 THYSANO-LEJEUNEA. 
Obs. The composite species “ comosus ” was founded by Lindenberg on 
the two forms above described, and his description in Syn. Hepat. com- 
bines the characters of both. I have examined the type-specimens in 
herb. Hook., named by Lindenberg himself, and find them abundantly 
distinct.—If the oriental plant is to be regarded the true “ comosus,” 
then the Guiana plant may bear the name Thysano-Lejeunea dissoptera 1 
have given it above. 
2, THYSANO-LEJEUNEA DISSOPTERA, Spruce. 
Thysananthus comosus Lindng. Syn. Hep. 288, pro p. “ Guiana”: hb. 
Hooker! (Ipse nusquam leg). 
F13x1:1; lob 35, ¢ Jy; f* &X°85; br 1:4; per 15x10; ale 25% 
late. 
Elata procumbens. Caules 3-pollicares ineequaliter pinnati v. bipinnati, 
‘amis nonnullis (inferioribus precipue) devexis microphyllis radi- 
cantibus. 
Folia rufo-badia conferta decurva oblique ovali-rotunda abrupte apicu- 
lato-acuta, margine postico late incurva (unde subligulata vide- 
antur) nec raro subdenticulata ; lobulus 4-plo brevior angustus semio- 
vato-linearis, ad apicem usque cum lobo confluens, vel dente brevi 
prominens, inflexus involutusve ; cellule parvule iis L. amazonice 
conformes, 
Foliola late imbricata foliis dimidio breviora, prelate cuneata, paulo latiora 
quam longa, e marginis inferioris recurvatione subspathulata, apice 
rotundato raro obscure retusulo denticulata, a basi ultra medium 
impresso-canaliculata. 
Flores dioici: 2 rari, terminales, innovatione simplice v. parce prolifera 
suffulti. Bractez foliis perpaulo longiores suberectze; lobo longe 
oblique ovato subacuminulato apice margineque postico subspinuloso; 
lobulo vix ad lobi } alt. usque cum eodem connato dein libero, 
lobo duplo breviore subrotundo apice bifido (raro 3-fido), segmentis 
acutis, margine toto spinuloso; bracteola eequilonga ovali-cuneata, 
breviter bifida, segmentis acuminulatis, spinoso-serrulata. 
Perianthia apice vix subemersa, obovata, trigona, ex apice subemarginato 
brevi-rostellata, angulis ab apice ultra medium latiuscule alatis, alis 
duplicatis, utraque bis laciniata, lacinulis hamatis; facie antica inter- 
dum obscure obtuse biplicata, lateralibus 1-plicata; plicé una alter- 
ive raro apice cristulifera. Calyptra paulo brevior angustiorque 
ovali-pyriformis demum apice 3-fida. 
+ THYSANO-LEJEUNEA Comosa (Lindng.). 
Thysananthus comosus, Lindng.! Syn. Hep., p. parte. 
Hab. Pulo-Penang (hb. Hooxsr!). Nova Guinea (hb. LINDBERG!). 
F 15x 1-0, lob 25; ¢ gy—ady 3 [11x 7; “br 2:0™™, 
tobusta rufo-badia. Caules bipollicares inferne fastigiatim divisi, dein 
pinnati, aliis pinnis decurvis microphyllis apice radicelliferis. 
Folia arctissime imbricata, concava, in sicco julaceo-convolutiva, oblique 
ovata, apice decurvo-cucullato abrupte apiculato-acuta seepeque sub- 
denticulata, margine postico involuto basi minute complicato; lobulus 
