672 IlLICES. 



139. A. lineatum, Kaulf. Leaf linear, tapering into tlie subsessile base, costate ; 

 sori 2-4 on each side of the midrib, parallel to it, approximate, but distinct, sunk into 

 yrooves the grooves lined by plaits, continuous throughout the fertile part of the leaf. — 

 Schh. Crypt, t. 101. b. dextr. Hoak. Gen. t. 107. — Pclytajaium, Desv. Vittaria lanceo- 

 lata, Sw. — Ambiguous between Antrophyiim and Vittaria, of which latter genus it has the 

 narrow, rectangular vein-meshes. Leaves csespitose, l'-4" long, 3"'-2"' broad, acuminate, 

 or blunt, chartaceous. — Hab. Jamaica !, Pd.,"im trees, S. Georges ; [Cuba ! and Guatemala ! 

 to Brazil!]. 



140. A. lanceolatum, Kaulf. Leaf narrowly linear-lanceolate, tapering at both 

 ends, costate ; sori superficial, chiefly along the longer sides of narrow vein-meshes, often 

 anastomosing, in 4-2 flexuose series alon^ the longitudinal diameter of the leaf. — Plum. Ml. 

 t. 127. C. : a rough figure, and leaf too broad. Schk. Crypt.. t. 6. sin. — Hemionitis, L. — 

 Leaf 14'-6" long, 6"'-4"'(-2"') broad.— Hab. Jamaica I, Pd., on fallen trees ; Dominica!, 

 S. Vincent !, Guil^., Barbadoes I ; [Cuba I and Mexico ! to Venezuela! and Guiana !] 



22. CERATOPTERIS, Aongn. 



Sori continuous, decurrent along 1-2, special, longitudinal veins, parallel to the midrib, 

 embraced by the revolute, membranaceous margin of the narrow segments of the fertile leaf : 

 no proper indusium. Sporangia subsessile : ring often reduced ; spores globose, large, few. 

 — An aquatic Fern ; fertile leaf Z-4s-pinnatisect, sterile difform, memhranaceous 2(-3)-i)j«- 

 natipartite {^-undivided), with broad, lobed segments : veins areolate. 



141. C. thalictroides, Brongn. — Hooh. Gen. t. 12. Sook. Grev. Ic. i. 97. — Acro- 

 stichum, L, Parkeria pteridoides and Lockhartii, Hook. Grev. — Hab. Jamaica 1, Wils.,. 

 Wiles; S.Vincent!, Wright.; Trinidad !, P;^. ; [all tropical countries]. 



23. PLEUROGEAMME, Pr. 



(Cochlidium and Hymenolepis, Kaulf.) 



Sori continuous, lining closely the midrib, confluent transversely above -it, confined to a 

 special anastomosis of -veinlets in the upper part of the narrow leaf, often embraced by its 

 margin, naked. — Leaf linear, or forked. 



142. P. graminoidesj Vee. Leaf linear, (or 2-fid at the summit), blunt, tapering 

 toward the subsessile base : fertile 'part laterally incurved round the included narrov) sorits, 

 wilh a replicate, flattish margin: veins inconspicuous. — Sw. Synops. \. f. 5. Hook. Gen. 

 t. 84. — Asplenium, Sw.' Grammitis, Sw. Cochlidium, Kaulf. Monogramma, Desv: — 

 Leaf l"-2" long, 1'" broad, recurved. — Hab. Jamaica {Sw.), on trees, in the highest moun- 

 tains ; [Cuba ! to Venezuela ! and Guiana !] . 



143. P. linearis, Pr. Leaf linear, blunt, tapering at the subsessile base and upwards 

 into the base of the long, fertile part : the latter obtusely keeled above, biconvex beneath, 

 with the margin distant from the sorus : veins free with a thickish summit, not excurrent 

 into the margin ; sorus as broad, as each of the convex sideSj which line it. — Hook. Gen. t. 

 72. A., 75. 4.— Tffinitis, Kaulf— l^i 6"-4" long, 2"' broad below, li"' at the sorus, 

 flexuose. — Hab. Dominica !, S. Vincent I ; Trinidad I, Cr.; [Guadeloupe !]. 



24. BLECHNUM, i. 



Sori continuous (or interrupted), decurrent along a special, longitudinal anastomosis of 

 veins, parallel and usually approximate to the midrib : indusium lining the sorus at its exte- 

 rior side. — Veins beyond the sorus usually free. 



144. B. polypodioides, Padd. Leafpinnatipartite, pinnatiseot at the base, pinnatifid 

 below the entire apex, shortly petioled : segments broadly adnate, oblong, pointed, suben- 

 <ire, lowest short, deltoid : sinus acute ":, veins subdistant, most forked ; "sori about half as 

 long as the segment, appressed to the midrib. — Variable in size ; sori unequal, superior oftett 

 wanting.— Hab. Jamaica {Fd.) ; [Haiti and Mexico to Peru ! and Brazil]. 



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