FILICES. 667 



2"'-l£'" long.— Hab. Jamaica!, Wils., Pd., Wiles; [Cuba! to French islands!; Venezuela ! 

 to Brazil ! ; Galapagos !]. 



109. H. nigrescens, Hook. Prickly, glabrous; leaf Z-pinnatisect : tertiary seg- 

 ments oblong, bluntish, most equal, low pinnatipartite, superior pinnatifid, uppermost and 

 ultimate ones serrate : lobes and serratures bluntish : sori single at the base of their an- 

 terior margin : involucre minute, scarious. — Hook. Spec. t. 90. C. — Distant primary seg- 

 ments 1', secondary 3"-2", most tertiary 6"' long, ultimate 1'" broad, lowest 2'" long.— 

 Hab. Jamaica !, Wiles ; [Martinique ! ; Venezuela ! : I exclude Cuming's East Indian 

 habitat]. 



110. H. Pnrdieana, Hook. Unarmed, glandular-hairy below ; leaf S-2-pinnalisect : 

 ultimate segments oblong, blunt, pinnatifid with rounded lobes, decurrent into the mar- 

 gined rhachis, uppermost cuneate-entire ; sori single at the base of the anterior margin of 

 the lobes: involucre half-round, herbaceous, scarious at the margin. — Hook. Spec. t. 91.5. 

 —Not to be distinguished from Polypodium rugulosum, Lab., but by the specially trans- 

 formed, involucral appendages, and probably passing into that widely ranging species {H. 

 rugulosa, J. Sm.).— Ultimate segments 3"'-2'" long, 1"' broad.— Hab. Jamaica!, Pd., 

 Westmoreland; [New Granada]. 



16. CHEILANTHES, Sw. 



Sori round, distinct or confluent along the margin, inserted into the summit of all or 

 most free veinlets, covered by reflexed, specially transformed appendages of the margin. — 

 Leaves divided, usually much so. 



§ 1 Sori approximate or confluent. 



111. C. micrc.ph.ylla, Sw. Leaf 2-pinnatisecl, pnberulous beneath or glabrescent : 

 secondary segments serrate-pinnatifid, blunt, ultimate subentire : petiole terete, about as 

 long as the blade, rusty-pubernlous chiefly on the upper side ; sori shortly or interruptedly 

 confluent .- involucre membranaceous. — SI. t. 13. /. 2. Plum. Pit. t. 58. Hook. Spec. t. 

 98. A.— Adiantum, Sw. C. elongata, Eat. PL Wr— Leaf-blade 6"-] 2", primary segments 

 l w -14" long, most of the latter subequal; longer secondary segments 4"'-3'" long, 2"'-U'" 

 broad. — Hab. Jamaica!, Hartw., Wils., in mountain-woods ; S.Vincent!. Guild.; [Cuba! 

 to Trench islands ! ; Mexico ! to Peru ! ; Galapagos !]. 



. The Jamaica habitat of C. marginata, Kth. (Hook. Spec. 2. p. 106), is erroneous, all Pur- 

 die's specimens proving to be from New Granada. 



§ 2. Sori roundish, all distinct (Adiantopteris, Fee). 



112. C. radiata, J. Sm. Slender, glabrous; leaf palm atisect : segments pinnatisect, 

 secondary horizontal, oblong, blunt, upward anricledat the truncate, shortly petiolulated base, 

 subentire, most equal : most veinlets simple ; sori distinct, lining the margin : involucre 

 *alf. round, membranaceous.— Plum. Fil. t. 100. Hook. Spec. t. 91. ^.—Adiantum, L. 

 Hypolepis, Hook.— Petiole black-shining, terete, 12"-4"long; primary segments expanded 

 like 5-9 rays, middle longer 6"-3", exterior 3"-l" long : secondary ones 4'" tonj; \" 

 broad— Hab. Jamaica!, Pd., Manchester; Dominica !, Imr. ; [Cuba!, Haiti !, &eb. Mart. 

 398 ; Mexico ! to Peru ! and Brazil !]. 



113. C. pedata, J. Br. Slender, glabrous ; leaf ternatisect : 2 lateral divisions un- 

 equally 2-partite with the lower and shorter segments pinnatisect, the superior and the del. 

 toid middle division 2-pinnatisect below, pinnatisect with pinnatipartite segments above : 

 ultimate segments obliquely oblong, bluntish, subentire (except at the abruptly .uncled upper 

 side of the cuneate, shortly petiolulated base), superior decrescent : most veinlets simple; 

 son distinct: involucre reniform, membranaceous.-^. Spec, t 92 .^.-Hypolepu, 

 ^^.-Petiole of the preceding; leaf-blade 6"(-12") long and usually as broad « u t.mate 

 inferior segments 3"'-V" long, 1'" broad above the spreading aunclc.— Hab. Jamaica !, Pd. ; 

 [Veraguas]. g 



