Four new species of ferns from New Guinea

G. erecta C. Chr. affinis, differt: segmentis maximis laminae ramorum ultimorum 8—15 mm longis, costulis 3—4 mm inter se distantibus. Rhizome to 3½ mm diameter; stipes to 50 cm long; primary rachis-branches usually forking in 3 or 4 orders, branches of all orders except the last 3—5 cm long, ultimate branches to 20 cm long; stipular leaflets, more or less lobed, present at bases of primary branches, or lacking; penultimate branches in most cases fully leafy, sometimes partially so; lamina-segments on ultimate branches 8—15 mm long, at 60—70° to costa, bases of their costules 3—4 mm apart; scales as G. erecta, those on costae c 1½ X ½ mm, spreading at right angles, dark brown with slender ascending marginal hairs towards apices.