IV. ASPLENIE^E. 



Sori superficial (not in grooves), springing from the sides of the 

 fertile veins; indusium opening on the side away from the vein, or 

 wanting; stipe not articulate to the rhizome. 



1. Sori born along lateral veins or veinlets, not parallel to the 

 midrib. 

 2. Indusium wanting. 



3. Veins free, fronds pinnate (23) Conio gramme 



3. Veins anastomosing, fronds simple. 



4. Sori anastomosing copiously (24) Hemionitis 



4. Sori seldom or never anastomosing. 



5. Veins invisible, anastomosing through- 

 out (25) Loxogramme 



5. Veins visible, anastomosies marginal.... (26) Syngramme 

 2. Indusium present. 



3. Veins forming regular areolse. 



4. Indusium opening along its margin (27) Callipteris 



4. Indusium rupturing irregularly (28) Allantodia 



3. Veins free (unless at the margin). 



4. Some sori double, on both sides of a vein, 



the free sides opening (29) Diplazium 



4. All sori simple (30) Asplenium 



4. Sori between two veins, indusia attached to 



veins, opening along middle (31) Triphlebia 



1. Sori parallel to midribs (Blechnece). 



2. Indusium wanting, rhizome scandent (32) StenocJilacna 



2. Indusium present, mostly terrestrial. 



3. Veins free between sori and margin (33) Blechnum 



3. Veins anastomosing between sori and margin (34) Woodwardla 



(23) CONIOGRAMME F6e. 



Rhizomes creeping; fronds pinnate or bipinnate, glabrous, fertile frond 

 nowise differentiated; veins pinnately arranged, forked, in Philippine 

 material free; sori covering the veins from the midrib to well toward 

 the margin, exindusiate, without paraphyses. Large terrestrial ferns, thin 

 in texture. 



(1) C. fraxinea (Don) F6e (Gymnogramme Jwv<mica Bl.). Stipe 0.3 

 to 1.2 m. high, naked unless at the base, stramineous or brown, polished; 

 frond about 1 m. high, broadly lanceolate, pinnate or bipinnate; pinnae 

 (or pinnules) short-stalked, the upper sessile, lanceolate, long-acuminate, 

 entire or serrate, herbaceous; veins mostly once forked; sori along all 

 of them. 



