Cibotium.} FILICES, 545 
3. G. dichotoma, Hook. 1. c. p. 12. — Stip. slender, terete, not sul- 
cate, often 10—15 ft. long, a cae repeatedly Series in the upper 
portion at open angles, the ultimate pair of branches frondose, pinnatifid 
to near the base, and a smaller pair of similar lateral pinnules besides 
at the base of each bare fork. Buds small, covered with a brownish 
wool. Frondose branches or pinnae rigid, chartaceous, glaucous under- 
pinnatifid. Lateral pinnules of varying sizes, the lower ones often equal 
to the frondose branches, the upper reduced, crenate, ‘even subentire. 
Veins with 3—5 parallel branches (nervy. Neuropter.). Sori of 10—12 cap- 
sules, seated on the middle of the anterior veinlet. — Synops. Fil. p. 15. 
— Polypodium dichotomum, Thunb. and Forster. — Mertensia dichotoma, 
Willd. Gaud. Brack. — G. Hermanni, R. Br. — Bot. Beech, p. 103 
Whenever the eter) pinnules are large and deeply divided the insesit 
outer segments of the frondose pinna are so too, only in a less degree, 
suggesting the idea that the former are in reality only the lowest segments 
f an otherwise aborted frond or pinna 
Common on all island is from 600 ft. above the. pr (Hilo district) to 3000 ft. It often 
covers extensive a: tropical countries of both hemispheres 
and in many islands of the Pacific. 
8. var. emarginata. — A stouter plant, the stipes muricate at the base 
and scantily villous. Fro ick coriaceous, tomentose underneath with 
nd t 
a fulvous wool of branching hairlets. Last branches 9—12’ K 3—4’. 
ents emarginate or bifid, the outer basal one pectinate or pinnatifid. 
Veins prominent above, exceptionally uniting to form a costal areole. 
All buds enclosed between two small but frondose, ovate, hiaes leaflets. 
— Hertensia emarginata, Brack. Fil. U.S. E. es p. 297, pl. 4 
i forks again at the next node. — 
Oahu! Kaala: Hawaii! Hamakua. Most fronds pa while a is rarely found so 
variably absent in all specimens of « from the Hawaiian islands. 
be made out in the pos Po form from the Viti aiane a Ceylon Natal. 
The figure of G. gigantea, Wall., in Sp. “Fil. tab. 3, shows bracts of much larger « 
4. CIBOTIUM, Kaulf. 
Sori globose, at the apex of a vein, marginal, enclosed in a prominent, 
coriaceous, deeply 2-valved involucre, the outer box-shaped valve 
Proceeding from the margin of the segment, but being of different texture. 
Sporangia pedicellate. Annulus slightly oblique, in our species consisting 
of about 30 well developed and 8-—10 indistinct articulations. Spores 
tetraedrous. — Arborescent ferns, ae twice pinnate fronds of acer 
Hillebrand, Flora of the Hawaiian Island 
