of frond of As- 

 plenium Bourgsei. 



Fm. 434. 



FILICES. (FERN FAMlLV.) 000 



12. ASPIiENHJiH, L. Spleenwort. 



Sori oblong or linear, oblique. Indusium one- 

 sided, fixed by one edge to the inner side of the fer- 

 tile vein, opening inward (upward). Stipe continuous 

 with the root-stock — Tufted ferns, usually growing 

 in shady places. 



1. A. Bourgsei, Boiss. 11 .05 to .15. Fronds 

 oblong-lanceolate, pinnate ; the short stipe and rachis 

 greenish-h'own, glabrous with exception of scattered, 

 membranous, veined chafi; pinnae oblong, obtuse, 

 sessile, somewhat decurrent, pinnatifid, with minute, 

 oblong, denticulate lobes — Clefts of rocks — Natural 

 bridge of Litany ; Amanus, and northward. 



2. A. Tric]iomane§, L. If .1 to .4, densely 

 tufted. Fronds linear-lanceolate, short, stipe and ra- 

 chis, da7% polished hrown^ the latter with a crenulate, 

 winged margin ; pinnse nearly or quite sessile, obliquely 

 cuneate or truncate at base, roundish-oblong or elliptical, 

 unequal-sided, crenulate — Summer — Clefts of rocks 

 and walls ; common. 



3. A. Rutamuraria, L. If .05 to .15. Fronds 

 ovate, glabrous or glandular, 3-8-alternate-pinnate ; 

 long stipes and rachis greeii, blackish at base ; the few 

 ultimate pinnules obovate, with wedge-shaped base, 

 and crenulate or denticulate apex — Summer and au- 

 tumn — Alpine summits of Sunnin and Makmel. 



4. A, Adiantum-nigrum, L. % Silver Fern. .2 to .4. Stipes 

 long, black, glossy, stout. Fronds glabrous, coriaceous, triangular- 

 lanceolate, acuminate, 2-3-pinnate; lobes of ultimate pinnules oblong, 

 cuneate at base, entire or dentate at apex — April to July -- Shady 

 rocks ; common in lower and middle mountain zones. 



Var. Virgilii, Boiss. More dissected than in type. 



5. A. septeiitrioiiale, L. If .1 to .3, tufted; root-stock short, 

 covered with tawny scales. Fronds on long, glabrous stipes, coriace- 

 ous, glabrous, forked into 2-5, linear, elongated, petiolulate, acute, 

 entire or sparingly incised-toothed lobes; sori linear, at length conflu- 

 ent, covering the whole lower surface of the lobe ; margin of indusium 

 entire — July — Clefts of rocks ; Amanus, and northward. 



Pinna of Asple- 



niumTrichomanes 



4 diameters. 



6. A. Filix-FflBmiiia, L. Lady Fern. If .6 

 to 1 ; root-stock thick. Stipe more or less covered 

 at base with dark-brown, scarious scales ; frond ob- 

 long, lanceolate, tapering at base and apex, bipin- 

 natisect; pinnse oblong, tapering; pinnules numer- 

 ous, oblong-lanceolate, lobes ovate, usually 3-4- 

 toothed on each side toward tip ; sori oval or reni- 

 form ; indusium fringed — July — Woods ; Amanus. 



13. ASPIDHJJH, Sw. Shield Fern. 



Fig. 435. 



Lobe of a pinnule of 

 A. Filix-Foemiaa. 8 

 diameters. 



orbicular, peltate, fixed by umbilicate centre, free all around margin. 

 Stipe continuous with root-stock. 



