FERNS OF THE MALAY- ASIATIC REGION. 
25 
10. Gleichenia hallieri Christ. 
Kachis stout, chestnut, bearing a few brown subulate hairs, subnitent, 
bearing paired lateral pinnae 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 hard 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 brandh once or twice forked, or, in the best-developed 
specimens, forked at the apex and with a pair of twice-forked p i nine 
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 6 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, 6 mm in diameter, scaly and verrucose 
at the base, otherwise smooth, forking once, terminal bud of stramineous, 
scarious scales; branches (pinnae) ascending, 40 to 60 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. 
