I'TERIS. 225 



srjn. of Plum.). Willd. Sp. PL v. p. 398. Ag. Sp. Gen. 

 Ptcrid. p. GS. Pt. sterilis, Pr. Del. Pray. p. 1 84 ? Polypo- 

 diuni si)inosum, Linn. Sp. Pl.p. 1554 [Ay.). Pt. Beecheyana, 

 Ay. Sp. Gen. Ptcrid. p. GS. Pt. uenioralis, Hook, et Am. 

 But. of Beech. Voy. p. 75. Pt. Protea, Liebm. Fil. Mex. 

 p. 7G [fid. speciin. in Herb. Nostr.). 



llab. West Indian Islands: St. Vincent, most abundant, but the stipes even at 

 the base exhibit no appearance of aculei, L. Guilding, in Herb. Nostr. (these being 

 authority for Agardli's i)lant, Sp. Gen. Pterid. 1. c, verified by comparison with 

 Swartz's plant, I must consider it the type of the species, and any pecuUar varia- 

 tion I shall here notice under the respective localities) ; Cuba, C. H'right, n. 873. 

 Urazil, Sellow {e.v Herb. Reg. Berol. ; mi Pt. elata, Ag. ?). Venezuela, Fendler, 

 n. 97 (small, more rigid, stipes quite smooth to the base). New Grenada, Ocafia, 

 Sc/ilim, n. 77, 5000 feet elev. (terminal pinns only with very long, remote segments, 

 3-4 inches long). Columbia, Salango, lat. 1° 34', Hinds (pinn<e and segments remote 

 and elongated, sinuses subbiangular). Ecuador, Seemann (pinnae twice and even 

 thrice the ordinary size, not otherwise different). Me.\ico : Tumaeo, Hinds (large) ; 

 Ycapa, Linden, n. l.")09 (pinnules large, and scarcely different from Pt. elata, 

 Ag.) ; Calipa (piinix large, membranaceous ; segments remote, mostly opposite, 

 and cuneately decurrent). Society Islands, Nightingale (copious specimens, large, 

 but ordinary form). Coral Isles, Beecheg (ordinary form). — This jdant has already 

 given occasiou to some remarks under Pt. Kun::eana, p. 222, and I have ventured 

 to consider that species (if species it be) as bearing a much greater resendilance 

 to the " Pteris arljorescens ramosa et aculeata," Plum. t. 5 and 11, always quoted 

 under our present j)lant. But I cannot reconcile myself to the fact of either of 

 these being a " Filix arborea ;" nor do I find the stijjites to be, in any specimen, 

 fis Swartz describes them, " aculeati," and as Plumier represents his s])eeies. 

 Sloane's figure, t. 56, often quoted under the present species, Agardh properly 

 excludes as too unsatisfactory. 



109. Pt. (Litobrochia) tripartita, Sw. ; fronds ample tri- 

 partite, lateral branches pinnate (bipiiniate ? ) spreading long- 

 petiolate subinemi)ranace()us glabrous, pinnules 4-6 inches or 

 more long linear-oblong or linear-lanceolate subsessile acumi- 

 nate rather deeply pinnatitid, segments approximate linear- 

 oblong falcate (upwards) obtuse or acute entire or scarcely 

 serrated and only at the apex nearly half an inch long, 

 sinuses obtuse, basal veins forming a single arc parallel with 

 the costa, a series of .3 or 4 or more areoles are parallel 

 with the costule, rarely a second series api)ears between 

 these and the free veins which thence extend to the margin, 

 stipes elongated often stout and as well as the rachises sub- 

 castaneous. — Siv. Syn. Fil. pp. 100 and 29.3. JJllld. Sp. PL 

 V. p. 400. Blum. Ennni. Fil. Jav. p. 211. Presl, Reliq. 

 H(enk. p. 58. Ag. Sp. Gen. Pterid. p. 72. Pt. semiovata, 

 Poir. Encycl. v. p. 723 [Ay.). Pt. revolvens, Ay. I.e. p. 73. 

 Pt. subpedata, JVoll. Cat. n. 10 [yonny plant). Ay.l.c.p. 7l. 

 Pt. intermedia, ii/. En. Fil. Jav. p. 211. Ay. I.e. p. 'J I, note. 



