FILICES. 689 



235. A. mucronatum, Sw. Leaf pinnate : leaflets oblong-lanceolate, bluntish, ob- 

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

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

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

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

 the veinlet is a little produced beyond the receptacle ; leaflets l"-2" long.— Hab. Jamaica 1, 

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



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



<&oo. A. semicordatum, Sw. Leaf pinnate .- leaflets lanceolate-linear, acuminate, 

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

 indusium peltate-orbicular, entire.— Fee, Folypod. t. 22. A.— 3'-4' high; leaflets 3"-5" 

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

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

 Pd., Wils.; S. Vincent!, Guild.; Trinidad!, Pd.; [Cuba! to Peru!; Galapagos!; East 

 Indies], 



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

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

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

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

 36./. 2. 3. Schk. Crypt, t. 29. b. sin. — Polvpodium, L. A. mucronatum, Schk. (non Sw.). 

 —Segments 6" / -12'"(-lS'") long = rhachis often proliferous at the apex. 



«• Segments deltoid-rhomboid or hastate, usually dentate. — Polystichum ilicifolium, Fee. 



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

 or subeutire. — SI. t. 36./. 1. — A. mucronatum, Eat. Fl. Wr. Polystichum viviparum, Fee: 

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

 the rest. 



% tridens, Hook. Segments 3-fid-3-partite.— Hook. Spec. t. 215. 



Hab. Jamaica !, all coll. (a, ft, y), on mountain rocks ; [Cuba !]. 



238. A. rhizophyllum, Sw. Leaf pinnatisect, with the terminal segment elongated, 

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

 roundish, subeutire, superior decurrent ; veins forked or dichotomous ; sori 1-2-serial, con • 

 fined to the terminal or upper segments : iudusium peltate-orbicular, repaud. — Hook. Grev. 

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

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

 long-— Hab. Jamaica !, Fd., Wiles; [Cuba!]. 



239. A. viscidulum, Metten. Leaf pinnatiparlite, glandular-puberulous, subsessile: 

 segments oblong-lanceolate, bluntish, crenulate or subentire, 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. glandulosum, Hook. Grev. (non Bl.).—4,"~Q" high- 

 A broad, caespitose. — Hab. Jamaica !, Fd.,'m woods; [Cubal]. 



§ 2. Veins not areolated, slender. 

 * Leaf 2-4-pinnatisect : segments oblique or auricled at the base ; veins free. 



210. A. aculeatum, Sw. Leaf 2-pinnatisect : secondary segments obliquely acute, 

 nucronate-serrate-lobed, caaente and upwards auricled at the bate, lowest superior lobe 

 hrger, erect ; most veins forked ; indusium peltate-orbicular or abortive.— 2 -6 high, very 

 variable, paleaceous. West Indian forms : — . 



ft'- Moritzianum, Kl. ! Leaf chartaceous : lowest primary segments smaller; indusium 

 membranaceous > most palea: narrow. . , . mwm ootrmania „ nl 



, V. platyphyllum, W. Leaf chartaceous (or herbaceous) : lower primary ■%»'"<•>><* 

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

 Metten. Fit. Lips. t. 22. f. 1.— Polypodiuin, Hook. ! (Phcgoptens, Metten.) 

 <L Hab. j aina 4 1 Ba Ji \y } . T £ idad -, Cr. (ft') ; [both temperate and tropical zones of 

 the globe]. 



