668 FILICES. 



17. NOTHOL^NA, J?. Br. 



Sori confluent along the margin, inserted into the summit of all or most free veinlets, 

 naked. — Leaves divided. 



114. N. trichomanoides, R. Br. Leaf pinnatisect, glabrate above, white-powdery 

 and rusty -tomentose with stellate down beneath and at the rhachis : segments short, oblong, 

 blunt, or ovate-oblong, sinuate, crenate or repand, piunatifid or auricled at tbe base, very 

 shortly petiolulute, flat at the margin, most equal ; sori lining the margin. — SI. t. 35./. 1. 

 Plum. Fit. t. 75 — Pteiis, L. Cheilanthes, Mett. N. ferniginea, Eat. PL Wr.—Um 

 12"-6", petiole 2"-3" long : segments 8"'-4'" long, 3"'-2'" broad, at first white, at length 

 rusty beneath. — Hab. Jamaica !, all coll. ; [Cuba!; Haiti]. 



115. N. rufa, Pr. Leaf pinnatisect, pilose-pubescent above, pale, at length rusty- 

 tomentose, but devoid of powder beneath, pilose at the rhachis : segments short, oblong- 

 lanceolate, bluntish, regularly pinnatifid or almost pinnatipartite, very shortly petiolulate, 

 revolute at the margin, superior decrescent ; sori juxtamarginal. — Cheilanthes ferruginea, 

 W. — In the Jamaica specimens (N. rufescens, Hook. Herb.) the leaf-segments are pinnatifid 

 only to the middle, and their revolute margin is scarcely membranaceous. — Leaf If ~1> P e " 

 tiole 3"-5" long : middle segments 8"'-5"' long, 2'" broad.— Hab. Jamaica !, Wilt* ° n 

 rocks and shingly soil, S. Andrews, at 3000-4000' alt. ; [Mexico ! to Peru ! and Buenos 

 Ay res]. 



18. PTERIS.Z. 



Sori linear, lining the specially transformed, revolute leaf-margin and covered by it, 

 mostly inserted into a special anastomosis of veinlets : proper indusium usually none. 

 Sterile leaves devoid of the fertile anastomosis of veinlets. 



§ 1. Sori naked beneath the leaf-margin. — Petiole with a single bundle of vessels. 



(Eupteris.) 

 * Leaf pinnatisect or lower segments pinnatisect again. 



116. P. longifolia, L. Leaf pinnatisect •. segments linear, acuminate, cordate or 

 truncate at the subsessile base, serrulate (except at the sori), numerous : veins mostly free, 

 forked : petiole pale ; sori continuous below the sterile apex. — Si. t. 34. Plum. Til. t. 69- 

 Schk. Crypt, t. 88.— P. vittata, L. P. bahamensis, Fee.— Segments 6"-2" long, 4"'-l 

 broad. — Hab. Bahamas !, Swains. ; Jamaica !, all coll. ; [Cuba ! to Venezuela ! ; Southern 

 Spain!, Italy!, and Dalmatia to tropical Africa, East Indies!, Australia, and Pacific 

 islands]. 



117. P. grandifolia, L. Leaf pinnatisect: segments lanceolate-linear, acuminate, 

 cuneate or rounded at the base, entire : veins parallel, forked, mostly connected towards the 

 sorus : petiole pale ; sori continuous. — Si. t. 40. Plum. Til. t. 105. Hook. Spec. 1- H*- 

 J?.— P. vittata, Schk. {Crypt, t. 89) i a form with the veins mostly free, collected by Kugel 

 in Cuba.— Segments 12"-6"(-4") long, 12"'-8'"(-6"') broad.— Hab. Jamaica!, Macf., 

 Lambert, Pd. ; [Cuba ! to French islands ! ; Mexico ! to Peru !]. 



118. P. mutilata, L. Leaf pinnatisect, 2-pinnatisect at the base : fertile segments 

 linear, mucronate-bluntish, superior shortly decurrent at the base, sterile oblong or elliptic* - 

 oblong, repand with a cartilaginous margin : veins forked or simple, free i petiole pale, 

 sori continuous. — Hook. Spec. 1. 131. A. — P. concinna, Heward: a form with " 2-pinnaU- 

 sect leaves." — 8"-H' high', long-petioled ; segments about 6-jugal, fertile l"-4 \ oD 8' 

 3"'-4'" broad, sterile as broad, but shorter. — Hab. Jamaica (Heward) ; [Cuba ! ; HaitiJ. 



119. P. heterophylla, L. Leaf pinnatisect, 2-3-pinnatisect at the base : fertile seg- 

 ments oblong-linear, few-serrate at the bluntish apex, decurrent, sterile spathulate, coarse y 

 serrate above the cuneate base •. veins simple or forked, free : petiole pale ; sori continuou . 

 — SI. t. 53./. 2.— 8"-12" high; segments about 6-jugal, fertile 12"'-8'" long, 2'" broaa, 

 sterile 4"'-5'" broad.— Hab. Jamaica !, Macf., Al., Pd., in shady woods; [Cuba ! ; Haiti; 

 Brazil !]. 



** Leaf 3 -partite : segments pinnatifid. 



120. P. pedata, L. Leaf cordate-Z-partite, opaque : segments pinnatifid(-2-pmna- 



