Lindsaya.| FILICES. 623 
(nervi recurrentes of Presl), vid. Metten. Fil. Hort. Lips. p. 101, sub Davallia 
elegans. Similar streaks between the veins, dark in Trichomanes and 
light transparent of thinner-walled cells in Polypodium perineum They 
occur also in the following species 
i! northern slope of Haleakala (Prot Alexander and Mr. Lydgate); Kauai! 
perlapa td (Kn.). 
8 var. bipinnata. — Middle pinnae substipitate, linear, with a subentire 
apex, the sides cut to an immarginate purple rhachis into 7—9 broadly 
obcuneate pinnules with narrow bases, their apices 1—l'/2 broad, ob- 
liquely truncate or rounded, sometimes notched, rarely produced at the 
middle. Veins single or once or twice forking, the soriferous ones anasto- 
mosing. Sori one or two to a segment, semilunar, often occupying the 
entire outer margin. Involucres even with the frondal margin or those 
of the lower pinnules short of it. 
Kauai! Halemanu (Kn.). 
a var. — The opposite basal pinnules cut again from the apex into 
or 3 cuneate or linear and again bifid truncate segments, the first of 
te iryspisie on the rhachis 
ui! N. flank of Haleakala, pie ft. (Lydg.). 
— Tripinnatisect. Rhachis fibrillose. Pinnae more elongate, 
ene long and 3—4“ broad at the base; most pinnules cut from the 
apex into 2—4 segments, one or two of which are cuneate with a broad 
apex and soriferous, the others linear- truncate and sterile. 
Haleakala (Lydg.). 
7. L. Knudsenii, sp. n. — Stip. and rhachis as before. Frond _ herba- 
ie lanceolate, 1-11), ft. long, narrowing below, bipinnate. Pinnae 
20—30 on a side, the middle ones 2'/2—4‘ long, to—1! broad at the base, 
subsessile with an equilateral cuneate base, undulato- crenate near the 
apex. Pinnules 6 or 7, obliquely cuneate-obovate or cultrate, pointed, 
entire or notched, the basal ones opposite. Veins nopentlly forking, 
with a leading nerve, or subpinnate with deliquescent costule in the larger 
pinnules, generally free, rarely two soriferous ones anastomosing. Sori 
submarginal, mostly discreet, 2—6 to a pinnule, straight or curved, 1/2—1'/2" 
broad. Invol. even with the margin. 
Kauai! screenees n.). — Here I also refer a less develo ped sterile frond, apparently 
of a  picing plant, with shorter and broader seonly cut pinnae, sons asta Spey rasm # 
which are drawn out to a short obtuse point. In lar anasto: 
& var. — Frond larger, 1'/2—2 ft. long, with 30--40 pinnae, 
ones with 8—9 pinnules on a side, of which the upper bas 
parallel and nearest to the rhachis. Pinnules cuneate-lanceolate, notched 
at acute angles into 3—7 cuneate- Belles pine truncate segments, each 
segment bearing one submarginal alm t straight sorus at the apex of a 
the middle 
al one is 
pest 
