548 FILICES. { Acrostichum. 
the rhachides. Lowest pinnae 2—2'/2 ft. long, with 24—36 pairs of pin- 
nules, on short stalks of 1/2—1‘. Pinnules sessile, 6—7‘ >< 6—10”, linear- 
lanceolate, cut to the rhachis into narrow aii rather pointed, subentire 
segments with narrow acute sinuses between; the lowest pair of segments 
often auriculate or pectinate on "pnetiodeg “hee rhachis; the sterile ones 
crenate or dentate. Veins and sori as in no. 2, the involucres as te 
or a little larger. — Hook. & Baker, Synops. Fil. us 49. — Brack. 
Dicksonia glauca, J. Sm 
On most islands! but rather rare. The pulu as to gloss and curl is intermediate between 
that of nos. 1 and 2; in a young, still circinnate frond its hairs appear connate, glu 
— siheee as to present narrow membra ‘anes. a The fr ond is not always bright glaucous 
5. ACROSTICHUM, L. 
Sporangia naked, spread over the whole under surface of the frond or 
upper pinnae, excepting the rib and margin, or sometimes over both 
surfaces. — A large genus, nee Rend tropical, including groups with 
a wide range of venation and cutting. Stipes articulate. above the base 
in our ae Teh os e eho generally different in size or shape 
from the sterile 
Veins all free > (Baptotnoum, Schott): 
r both fac 
Frond scaly over 4. A. squamosum. 
Frond n fake ¢ ertaceons, shining 1, A. micradenium. 
Frond naked, cori 
Fertile fronds F gnentog aan the barren ones; scales of rhizome 
A M 2. A. conforme. 
Fertile fronds like the barren ones; " scales of rhizome black 
along the yepuneios Hae Ss ae. 
Veins united by a a inramargina vein (Aconiopteris, Presl) 5. A. gorgoneum 
Veins anastomosing in se tli sodium, Fée) A, reticulatum. 
e res are 
6. 
muri . r species, ovoid-reniform to semiglobose, 
apparently with one short femal 8 an whieh ike at one or oth ends. Sporangium wi with 
10—14 cells to the ring, excepting no. 1 in which it has 17— 
1. A. micradenium, Fée, Acrost. p. 43, tab, 8. — Rhizome slender, long 
creeping, its few scales small, dark brown, shining, linear or subulate, 
sparingly glandular. Stip. at distances of 1/2—11/2‘, slender, 3—6’ long, 
eous or light brown, naked or slightly furfuraceous at the base and 
often glutinous. Barren fronds thin chartaceous, elliptico-oblong, 3—7' X 
3/a—11]a', — acuminate, contracting at the base, naked, shining; the 
Yeing distinct, subhorizontal, close and seine 
tes, sm a 
S/a—21/2! XX 1/4—1/2'. Fibro-vasal hoeia 2, seit approximate. — 
Sp. Fil. V, 216. — Synops. Fil. p. 400. — A. pellucidum, Gaud. Bot. Bon- 
tab. Scarce parry Brack. Fil. U. S. E. E. p. 70. pl. 9. 
On rocks or trees, from 1 and upward. All islands. — Nat. names of all 
species : «Ekaha» and inen Maui» shes paddle). 
