riLICES. 089 



235. A. mucronatum, Sw. Leaf pinnate : leaflets oUong-lauceolate, hluntish, ob- 

 ■ tusely serrulate above, subdimidiate-truncate and upward produced into a deltoid auricle at 

 the lose ; sori iutermediate between the margin and the midrib, or more distant from the 

 latter : indusium peltate-orbioHlar, entire.— SI. t. 36./. 4. 5. Schfe. Crypt, t. 20. c. dextr. 

 Hook. Spec. t. 216. — -Very similar to the preceding, which is as much paleaceous : sometimes 

 the veinlet is a little produced beyond the receptacle ; leaflets V'-%" long.— Hab. Jamaica I, 

 Hartw., Wils.; [Haiti to French islands ! ; Venezuela!]. 



** Leaf pinnate-pinnatipartite (-undivided) ; son dorsal on the veinlets. 



336. A. semicordatum, Sw. Leaf pinnate : leaflets lanceolate-linear, acuminate, 

 semicordate at the base : veins diohotomous ; sori 2(-3)-serial on both sides of the midrib ; 

 indusium peltate-orbicular, entire.— -Fes, Polypod. t. 22. 4.— 3'-4' high ; leafleta^3"-5" 

 long ; exterior sori in our form medial, interior near the base of its veinlet and clos4'to the 

 midi-ib, while in Fee's figure of an East Indian form all sori are medial. — Hab. Jamaica !, 

 I'd., Wils. ; S. Viuceat !, Guild. ; Trinidad !, Pd. ; [Cuba ! to Peru I ; Galapagos ! ; East 

 Indies]. 



237. A. triangulum, Sts. Leaf pinnatisect, subcoriaceous : segments deltoid-rhom- 

 boid or trapezoid, shortly cuneate or rounded or dimidiate at the base, spiny-dentate or sub- 

 eutire with mucronate angles (rarely 3-fid) : veins forked, lowest dichotomous ; sori uni- 

 serial : indusium peltate-orbicular, repand, dentate or suppressed. — Plum. Fil. t. 72. SI. t. 

 36./. 2. 3. Schk. Crypt, t. 29. b. sin. — Polypodium, L. A. muoronatum, Schk. (iion Sw). ^ 

 — Segments 6"'-12"'C-18"') long ; rhachis often proliferous at the, apex. ' 



a. Segments deltoid-rhomboid or hastate, usually dentate. — Poly>tichum ilicifolliim, F^e. . 



$. trapezoides, Sw. Segments dimidiate at the base, upwards auricled, usually serrulate 

 or subeutire. — SI. t. 36./. 1. — A. mucronatum. Eat. Ft. Wr. Polystichum viviparura. Fee: 

 a form with lai-ge segments, large serratures or lobes, and the inferior often separated from 

 the rest. "■*" 



y. iridenS, Hook. Segments 3-fid-3-partite. — Hook, Spec. t. 215. 



Hab. Jamaica 1, all coU. (a, ^8, y), on mouutain rocks ; [Cuba !]. 



238. A. rhizophyllunt, Sw. ie<i/ pinnatisect, viith the terfninal segment elongated, 

 lanceolate-linear, often proliferous (sometimes alone developed)': lateral segments obovate- 

 roundish, subeutire, superior decnrrent; veins forked or dichotoinous ;' sori 1-2-serial, . con ■ 

 fined to the terminal or upper segments ; indusium peltate-orbicular, repand. — Hook. Oreo. 

 Ic. t. 59. — A. Plaschnikianum, Kze. : the form with most or all lateral segments suppressed 

 (Hook. Spec. t. 211).— 4"-8" high, cajspitose; lateral segments 4"'-6"', terminal 2"-4" 

 long. — Hab. Jamaica !, PuJ., Wiles; [Cuba!]. ' ^ 



239. A. viscidulum, Jfrf^i'ft. Leaf pinnatipartite, glandutdr-puberulous,suhsessiie: 

 segments oblong-lanceolate, hluntish, crennlate or subenture, broadly adnate and often up- 

 wards auricled at the base : veins dichotomous or forked ; sori 1-serial : indusium peltate- 

 orbicular. — Hook. Grev. Ic. t. 140. — A. glandulosnm. Hook. Grev. (/ton Bl.). — 4"-6" high- 

 1" broad, cffispitose. — Hab. Jamaica I, Fd.,m woods; [Cuba I]. 



§ 2. Veins not areolated, slender. 



* Leaf 'ir-^-pinnatiseet : segments oblique or auricled at the base ; veins free. 



y^24:0. A. aculeatum, Sw. Leaf 2-pinnatisect : secondary segments obliquely acute, "^ 

 muci-onate-serrate-lobed, cuneate aud upwards auricled at the base, lowest superior lobe 

 larger, erect : most veins forked; indusium peltate-orbicular or abortive. — 2'-3' high, very 

 variable, paleaceous. West Indian forms : — 



0. Moritiianum, Kl. I Leaf chartaceous : lowest primary segments smaller; indusium 

 membranaceous ;' most palea: narrow. 



y'. platyphyllum, W. Leaf chartaceous (or herbaceous) : lower primary segments^ not 

 decrescent, lowest superior secondary ones little larger; indusium none (or "abortive"). — 

 Metten. Fil. Ups. t. 22./. 1.— Polypodium, Hook. ! (Phegopteris, Metten.). 



Hab. Jamaica I, Bancr. (7') ; Trinidad !, Cr. {fi') ; [both temperate and tropical zones of 

 the globe], • ' 



