* 
Pteris.| FILICES. 627 
with the sides adnate, the free external margin truncate or excised and 
even with the apex of the segment. Annulus with 26 joints. Spores 
smooth, ovoid, rors — Davallia tenuifolia, Sw. — Hook. Sp. ie » 
186. apa Fil, p. — Brack. l. ec. — D. rem eesti 
Beech. 1. ec. — Lindsaya Piedad Kuhn et al. 
of all Hawaiian ferns. Nat. name: «Palaa», From the leaves the 
natives used to extract a red dy he species is spread over all tropical Polynesia and Asia, 
extending ‘ar east Madagascar an rth to Japa ; SW; y differs 
in the rou x of the segments and the produced indusium om a t 
Lindsaya Knudsenii itis fair to infer that the speci s been evolved from a simpler 
form of Lindsaya, perhaps L. elongata, Lab.; in that case it would have to be trans- 
ferred to that genus, but I am not aware that this has been proved. For the present 
gs 
the truly cup-shaped indusia es adnate sides consign the fern to Microlepia 
19. PTERIS, L. 
Sori linear, mostly continuous, on an intramarginal anastomotic nerve 
which only exists in the fertile portion of the frond, covered by the 
reflected and usually membranous margin of the frond. In the last 
i rt t 
A large cosmopolitan genus, including species of various forms and modes 
of vegetation. 
Jnner or aati indusium wanting: 
Frond ica ate; pinnae entire, the lowest bi-, tripartite 1. P. Cretica. 
Frond | ham all pinnae pinnatifid SP. € d 
Frond tri-, pena: natifid, with winged rhachis 2. P. irregularis. 
Veins anastomosing : 
Frond Beas haa 1 foot long; rhachis winged in the upper 
iaten tima e segments deltoid or lanceolate 4. P. decipiens. 
Ultimate segments linea 5. P. decora 
Frond several feet in length; rhac his Br Ps 
Inner or true indusium present; frond =a pe ae coe at aquitina. 
Eupteris. — Veins free; involucre single; spores tetraedro-globose. 
1. P. Cretica, L. — Hook. Sp. Fil. If, 159. — Rhizome short creeping, 
thick. Stip. closely set, 8—18‘ long, stramineous or pale brown, with a 
few short and dark scales at the base only. Frond pheseriete: charta- 
ceous, glabrous, shining, ovate or ovate-oblong in outline, 7—12‘ X 6—10', 
pinnate. Pinnae opposite in 4—6 pairs, linear- lanceolate, entire, sabe: 
sessile with a cuneate base, 5—8‘ x '/2—%/4‘, the upper pair mostly 
confluent with the terminal pinna and decurrent, the one or two lowest 
pairs cleft nearly to the base into 2, rarely 3, subequal pinnules with 
the stipes winged in the upper half. Sterile pinnae sian and spinuloso- 
serrate. Veins (nervy. Taeniopterid.) perpendicular to the , fine and 
close, simple or once forked and Saree Invol. thin, continuous along 
e entire pinna excepting the apex. Annulus with 17—20 articles sce 
