FILICES. 687 



Or.). Aspidium umbrosum, Su)., Schk. (non ?r.).— Lowest primary segments 1' long 3"- 

 4 broad ; son l"'-4"' long.— Hab. Jamaica I, Pd. ; [Venezuela !, Ecuador ! ! Pacific islands 

 to New Zealand, Australia and East ludiea !]. ' 



225. A. Franconis, Metten. Leaf 3-2-pinnatiseet, "oblong:" ultimate segments 

 pmnatifid-serrate, upward produced at the base : veinlets pinnate, simple or forked, most 

 fertile ; sori linear, extending from near the vein to or beyond the middle of the segment, , 

 lowest anterior mostly donble ; indusiiim flattish,.— Metten. Asplen. t. 5. /. 30 : a leaf- * 

 segment.— Diplazium, Liebm. .- leaf " 2-pinuatisect," while it is usually 3-pinnatisect in the 

 Jamaica Fern.— Habit of J. fuscopulescens. Hook. (Spruce, 5416), which I refer to 

 J. alienum, Metten. Primaa-y segments " 4"-7" long, 2" broad ;" sori 2"'-l"' long.— Hab. 

 Jamaica!, March; [Mexico to Peru]. 



Sect. 8. Athybium, Rtk. — Sori shortly obloruj or half-oval, inferior (or several) 'produced 

 beyond the vein at their extremity and there mpportedby the auricle of the arcuate in- 

 dusium. 



This section is known to pass into Aspidium: I adopt the arbitrary limits proposed by 

 Mettenius, retaining in AspJenium those species where the indusium is lateral, and, though 

 often shortly, decurrent along its vein. 



226. A. conchatum, Moore. Leaf pinnatisect, ovate-oblong j segments oblong-, 

 linear, pimiatipartite, superior deeply pinuatitid : lobes or special seyments oblong, blunt, 

 serrate or serrulate ; veinlets pinnate, simple, lowest veins on the inferior side of their rib ; 

 most sori shortly oblong or half-oval: indnsium convex. — Fie, Polypod. t. 17. 0- f 1. 3. 

 — Hypochlamys pectinata. Fee. — Primary segments 6"-12" long, li" broad ; sori \"' long. 

 —Hab. Jamaica!, Pd., AL, Wils. ; [Cuba !, Wr. 1045 ; Haiti I]. 



Series 3. Aspidleee. — Sori confined to special points on the bade of the leaf. 



Subseries 1. Suaspidiece. — Receptacle flat. Sporangia with a vertical, usually in- 

 complete ring. 



38. MENISCIUM, Schreb. 



Sori shortly arcuate, inserted into the anastomosis of special veinlets, meeting between 

 costate veins, naked. — Leaf usually pinnatisect : intercostal vein-arches with a free append- 

 age ; son special between the veins, often confluent. 



$2T. in. reticulatum, Sw. Leaf pinnatisect ; segments oblong-lanceolate or lanceo- 

 late, acuminate, crenulate-repand or repand, obliquely rounded or euueate at the subsessile, o, 

 or shortly petiolulated base ; arches between the veins 12-15. — Plum. Fit. t. 110. Schk. ^ 

 Crypt, t. 5.— Polypodium, i.— Segments 4"-8"(-10" long). 



a. Segments oblong-lanceolate, most subsessile, l"-li" broad : rhachis piiberulous. 



jS. sorbifolium, W., Kze. Segments lanceolate, inferior shortly petiolulate, 10"'-12"' 

 broad : rhachis glabresoent. — M. Kapplerianum, Fee y 



Hab. Dominica !, Imr., S. Vincent !, Guild. ; Trinidad I, Lockh. ; [French islands I ; 

 Mexico ! to Brazil ! ; Fernando Po !]. 



228. M. angnstifolium, W. Leaf pinnatisect : segments numerous, lanceolate-linear, 

 acuminate, entire, obliquely cuneate or rounded at the petiolulated or subsessile base : arches 

 between the veins 6-8.— M. sorbifolium, Fat. (PI. Wr. 781).- Segments 5"-6" long, 

 Qi'i-Siii broad. — Hab. Jamaica !, Wils., Pd., on stones, in river-courses ; [Cuba ! , Panama ! 

 to Venezuela IJ. 



329. M. serratum, Cav. Leaf pinnatisect : segments lanceolate, acuminate, sharply , 

 serrate, obliquely rounded at the subsessile base : arches between the veins 6-8. — Segments ' 

 5"-7"long, 10"'-12"' broad.— Hab. Trinidad!, iocAA., ScA.; [Mexico to Brazil !]. 



39. DIDYMOCHLJINA, Bern. 



Sori oval, inserted into the thickened extremity of a veinlet : indusium above the sorus. 

 proceeding from the oblong middle part of the receptacle, free at the sides.- An arboreoui 



