7. GLEICHENIA. § 3. MERTENSIA. 85 



4E.4. Veins beneath sulcate (impressed) or often dark-coloured^ 

 or the under surface not soon naked. 

 S. Under surface naked. 

 \av. venosa: Near var. rigida but the ultimate segments 

 proportionally longer, linear, fragile when dry, reddish in aspect, the 

 veins beneath impressed or often dark-coloured. 



S.S. Under surface more or less persistently scaly., hairy 

 or tomentose at least on the costulae. 

 Var. piibigera: Like var. venosa but larger, the ultimate 

 segments often less rigid, not reddish, deciduously ferrugineo-tomentose 

 on the costulae beneath. 



War. einarginata: Ultimate segments very rigid, copiously 

 ferrugineo-villose beneath. 



War. ferriigiiiea: Ultimate segments coriaceous, not rigid, 

 densely ferrugineo-tomentose beneath. 



(7a) Gr. laevissima, Christ. 



Omit this species here. See No. 4c. 



(8) Cr. laevigata, Hfc.; — var. bracteata, Sst., in Fed., Rep., 

 V, 370; G. bracteata, Bl, in Herb. Hook. 



Axillary buds sometimes with some small, congested, green bracts. 

 Var. bracteata: Axillary buds distinctly pectinato-bracteate. 



(9) O. oceanica, Kuhn. 



Fronds up to 2 m. high, several times dichotomous at an acute 

 angle ; axes deeply pinnatifid, the lowest whether or not nudate. Ultimate 

 branches 10 cm. or more long. Lobes close, standing at a subacute angle, 

 to 2'/2 mm. broad, those toward the apex of the ultimate branches 

 abruptly reduced. Texture subcoriaceous ; under surface glaucous; 

 rachises clothed with ferrugineous, fimbriate squamules. 



Celebes (?); Polynesia. 



(12) €m. hirta, JSI.'/ G. amboinensis, v. A. v. R.; G. dolosa, Copel.; 

 Dicranopteris dolosa, Copel., in Perk., Fragm. Phihpp., 198, tab. IV C. 



(12«) fm. ornaiuentaliii, Rst., in Nov. Guin., VIH, Bot., 715. 

 Fronds dichotomous, the stipe and primary branches black-brown, 

 scaly, the scales ferrugineous, partly moderately large, lanceolate, fimbriate- 



