668 FILICES, 



17. NOTHOL^NA, S. Br. 



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

 nailed. — Leaves divided. 



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

 and msty-tomentose with stellate down beneath and at the rhachfs : segments short, oblong, 

 blunt, or ovate-oblong, sinuate, crenate or repand, piunatifid or aiiricled at the base, very 

 shortly petiolulate, fiat at the margin, most equal; sori lining the margin. — SI. t.Z'i.f. 1. 

 Blum. Fit. t. 75.— Pteris, I. Cheilanthes, Metf. N. ferruginea. Mat. PI. Wr.—Leai 

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

 rusty beneath.— Hae. Jamaica.'., all coll. ; [Cuba!; Haiti]. «• 



115. W. rufa, Fr, Leaf pinnatisect, pilose-pubescent above, pale, at,_length rustt/- 

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

 lanceolate, bluntish, regularly pinnatifid or almost pinuatipartite, 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 toihe middle, and their revolute margin is scarcely membranaceons. — Leaf li'-l', pe- 

 tiole Z"-h'! long : middle segments 8"'-5"' long, 2"' broad. — Hab." Jamaical, Wils., on 

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

 Ayres], " * 



18. PTERIS, i;. 



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 lettf-margin.-iPe,t\o\& with a single bundle of vessels. 



iJEupteris.) .^ 



* 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. Fit. t. 69. 

 Schlc. Crypt, t. 88.— P. vittata, L. P. bahamensis, JV«.— Segments 6"-2" long, 4"'-l"' 

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

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

 islands]. 



^ -117. P. grandifolia, i. 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. Pliim. Fil. t. 105. ffook. Spec. 1. 113. 

 B. — P. vittata, SchL {Crypt, t. 89) : a form with the veins mostly free, collected by Rugel 

 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. luutilata, L. Leaf pinnatisect, 2-pinnatisect at the base : fertile segments 

 linear, mucronatc-bluntish, superior shortly decurrent at the base, sterile oblong or elliptical- 

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

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

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

 3"i_4"' broad, sterile as broad, but shorter. — Hab. Jamaica {Heward) ; [Cuba ! ; Haiti]. 



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 spalhulate, coarsely 

 serrate above the cuneate base : veins simplejir forked, free : petiole pale ; sori continuous. 

 — a i. 53./. 2.— 8"-12" high; segments afcont 6-jugal, fertile 12'"-8"' long, 2'" broad, 

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

 BrazUI]. 



**• Leaf S-partite^ segments pinnatifid. 



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



