﻿62 7. GLEICHENIA. § 3. MERTENSIA. b. PROTOGLEICHENIA. 



+ 15 c.M. long, ± 2 c.M. broad, linear-lanceolate, acuminate. Segments of 

 the last internodes but one, abbreviate, deciduous, those of the ultimate branch- 

 es pectinate, erecto-patent, not imbricate, linear-lanceolate, + 1 c.M. long, 

 + 2 m.M. broad, bluntish, entire. Texture thinly herbaceous, weak; veins 

 inconspicuous, forked; surfaces covered with few, scattered hairs, nearly naked, 

 Sori fugacious. 

 Borneo. 



* (16) O. ainboinensiis, v. A. v. n. 



Fronds pinnate, ± 50 — 100 c.M. long, the" main and secondary rachises 

 deciduously tomentose or furfuraceous, at length naked, the apex of the frond 

 3 — 4 X dichotomous. Pinnae 2 — 3-jugate. Lowest pinnae erecto-patent, once 

 pinnate again, the apex dichotomously forked as are the pinnulae. Highest 

 pinnae 2 — 3 X dichotomous. All the forkings (not the pinniform primary 

 branchings) leafy and clothed beneath with 2 opposite rows of spreading, 

 triangular, elongate, ciliate, pale-yellow-brown scales, which are roundish or 

 cordate at the base. Ultimate segments subspreading, linear-oblong, 1 — 2 c.M. 

 long, ± 2 m M. broad, the apex bluntish and crenate, in + 20-50 pairs 

 on the ultimate forkings which are gradually narrowed towards the acumin- 

 ate, broadly toothed apex. Leaflets of the lower forkings often reduced 

 and + orbicular. Texture subcoriaceous ; under surface of the leaflets deci- 

 duously tomentose especially on the midribs, not rarely glaucous. 



Amboyna (Teysmann, Boerlage No. 488), Burn (Binnendijk No. 153). 



(17) O. cioloiia, C Cfer., lud. Fil.; Dicranopteris dolosa, Copel,, Perk., 

 Fragm. Philipp., 193, tab. IV, fig. C. 



Rhizome creeping; the scales lanceolate-subulate, squarrose, dirty -brown. 

 Stipes erect, + 1 — "2 M. long, terete, firm, black-brown, scaly near the 

 base. Fronds + 1 M. long, deltoid, pinnate, subdichotomous at the apex. 

 Pinnae 3 — 5-jugate, the lower ones 2-pinnate again. Highest pinnae and 

 tertiary branches in the lowest part of the frond repeatedly pseudo-dicho- 

 tomous, the forkings leafy, cut down nearly or quite to the rachis. Ultimate 

 segments 10 — 12 m.M. long, ± 2 m.M. broad, close, entire, obtuse, 50 — 80 

 on each side of the ultimate forkings. Texture coriaceous, surfaces naked 

 or nearly so; under surface bluish-glaucous; rachises clothed with distani, 

 spreading, brown or whitish scales. Capsules fugacious, 5 — 5 to a sorus. 



Philippines. 



