496 APPENDIX. 4. DICKSONlA. 



indusium 2-valved, the outer valve cucullate, formed by the apex of a 

 tooth, the inner valve flat, transversely oblong or suborbicular, distmctly 

 developed. — Omit the synonym D. papuana Muell. 



Forma typica : Sterile portion of the fertile teeth proportionally short 

 and broad, shorter than the fertile portion. 



War. dentaUfi,: Sterile portion of the fertile teeth proportionally 

 long and narrow, longer than the fertile portion. 



(3«) D. papuana, Muell., Pap. PL, lY, 76. 



Near D. sorbifoha Sm. but the pinnae shorter, to + ^\ cm. broad, 

 the pinnulae to 2'/j cm. long by at best 6 mm. broad, serrulate through- 

 out, the lov^rer not rarely shorter than the central ones; the inner valve 

 of the indusium less distictly developed, much broader than deep or even 

 obliterate. — "We possess three specimens (Sclechter Nos. 14207, 14460, 

 Copland King No. 103) vpith abbreviated and non-abbreviated lovs^er pinnulae, 

 with contracted and non-contracted fertile pinnulae; Mueller's original 

 plant is unknown to me but Schlechter's No. 14460 (with somewhat 

 abbreviated lower and non- contracted fertile pinnulae) seems to be the 

 typical form. 



NeiD Guinea. 



T. GLEICHEIVIA, Smith. 

 § 3. MERTENSIA. 



(M) See No. 5a. 



(3e) <jl. excclsa, a. Sm., Hk., Spec. Fil, I, 5, tab. IV B; G. 

 glauca, Hk. var., C. Chr., Ind. Fil. 



Near G-. giauca J. Sin. but the pinnulae remote, with the lowest 

 segments often semihastate with a short or more elongated, horizontal 

 lacinia on the lower side. 



Philipjpines. 



(ha) Ci. g-igantea, iVnil. 



Ultimate segments more or less remote, not positively contiguous. 



