FEBNS OF THE MALAY-ASIATIC REGION. 2d 



10. Gleichenia hallieri Christ. 



Rachifl stout, chestnut, bearing a few brown subulate hairs, subnitent. 

 bearing paired lateral pinna: below the apex ; pinnae about 3 times forked, 

 the lower "internodes" about 3 cm long, 2 cm wide, acuminate; segments 

 only above the second fork from the apex, and deciduous except on the 

 ultimate branches, crowded but not imbricate, 1 cm long, 2 mm wide, 

 entire, rather obtuse, thin-herbaceous, not glaucous beneath, very slightly 

 hairy; sori fugacious. 



Borneo. 



11. Gleichenia crassifolia (Presl) Copel. 



Frond very small or up to 40 cm high and broad, very bard and rigid 

 throughout, glabrous except the youngest part but the base of the stipe 

 rough; axis once forked and the branches pinnatifid into segments, or 

 forked and each branch once or twice forked, or, in the best-developed 

 specimens, forked at the apex and with a pair of twice-forked pinnae 

 lower down; a simple or pinnatifid foliaceous bract is borne stipule-like 

 at each forking of naked axes; ultimate branches linear-lanceolate, obtuse, 

 entire toward the apex; segments oblong, obtuse, bullate; sori of 4 to 9 

 sporangia. 



Luzon, Mindanao, on the highest mountains. 



12. Gleichenia linearis (Burm.) Clarke. 



Fronds with stipule-like leaflets at the forks, beside these only the 

 ultimate branches foliaceous, the segments linear or linear-oblong. One 

 of the most variable of ferns, as here construed. It is usually glabrous, 

 and glaucous beneath; and subcoriaceous, but varies to herbaceous and 

 to decidedly hard ; mature, fertile fronds vary from 40 cm to C m in 

 height; they may be once forked, or several times forked or forked at the 

 top with paired lateral leaflets lower down, and these leaflets may also bear 

 paired leaflets below the fork; sporangia up to 14 in each sorus. An 

 exceedingly variable species, construed here as including G. Warburgii 

 Christ. 



Japan and Korea to New Zealand, and throughout the tropics. 



13. Gleichenia laevissima Christ. (Plate XIV.) 



Stipe stout, up to 60 cm high, mm in diameter, scaly and vermcose 

 at the base, otherwise smooth, forking once, terminal bud of stramineous, 

 searious scales; branches (pinnae) ascending, 40 to GO cm long, bipin- 

 natifid, their axes all naked, stramineous or brown; pinnules alternate, 

 borne at acute angles, short-stalked, up to 17 cm or more long, acuminate ; 

 segments linear, borne at acute angles, up to 18 mm long, 1.5 to 2 mm 

 wide, subacute, entire, bullate, glabrous, not glaucous, coriaceous; sori of 

 3 to 5 sporangia, almost covering the surface. 



China. Luzon. 



