466 THE FAMILIES, GENERA AND SPECIES OF PTERIDOPHYTA. 



7. Blechnum, Linn. 



Differs from Lomaria in the position of the indusium. which 

 is attached at a distance from the mars^in of the leaf. Only 

 one species, very variable in aspect accordini;' to situation. 



I. B. aiistralc, Linn. — Mountahi kloofs, not common. 

 Magalieslierg" (R. ?). Sanderson ; Rnstenbnr^'. R.. Collins, in 

 T.ALH 774; Houtboschberi;-. Ze., Miss Easticood : Alarovimi,. 

 Ze.. Jnnod 221, 1,846. 



8. AsPLENiuM. Linn. 



.Sori linear or rarely oblong;", mostly along" pinnate veins, 

 rarely almost marginal, sometimes two placed back to back, 

 sometimes a little curved. Indusium attached along one side 

 of the vein and opening along the other side. — Leaves simple 

 or variously compound. 



Sori not marginal, linear or oblong, straight (Eit-Asplcniuni). 

 Leaf lanceolate. 2 in. (or less) broad; simply pinnate. 

 Leaf 3 to 6 in long, h to f in. broad; rachis green. 

 Pinnje sessile, sharply toothed. Plant bearing 



separate proliferous leaves i. Kraussii. 



Pinnae stalked, with 3 to 5 blunt lobes; leaves 



proliferous at the apex 2. Saiidcrsoni. 



Leaf I to 2 ft. long. .^, to ih in. broad; rachis black 



3. monanthcmum. 

 Leaf lanceolate. 3 in. (or less) broad; pinnate or 2- 

 pinnate. 



Leaf A to 3 ft. long, J to 3 in. broad 4. crcrtnni. 



Leaf 2 to 3 ft. long, proliferous; pinnse ^ to f in. 

 long, crenate, blunt, rhomboidal. 



4a. crcctnni var. liiuulafitni. 

 Leaf I to 2 ft. long. 2 to 4 in. broad, not proli- 

 ferous; pinnae fully pinnate; pinnules cuneate, 



toothed or lobed 4I). crcctuiii var. lobatiim. 



Leaf lanceolate or ovate-lanceolate, more than 3 in. 

 broad, pinnate or occasionally 2-pinnate. 

 Leaf 2 to 5 ft. long. 2 to 4 in. broad; pinns 30 to 

 40 pairs, I to i^ in. long. ), in. broad at base. 



5. profcnsuiii. 

 Leaf ir, to 2 ft. long, 4 to 6 in. broad; pinns 12 to 

 20 pairs, 2 to 4 in. long, ?> to i in. broad, bhmtly 



toothed 6. anisophyllnm. 



Leaf 2 ft. long, 8 to 10 in. br9ad ; pinnae 8 to 14 

 pairs, 6 in. long, i to i-^ in. Ijroad, sharply 



toothed 7. pno}iitis. 



Leaf 2 to 4 ft. long, 6 to 8 in. Inroad; pinna' 6 to 

 12 pairs, 4 to 6 in. long, i to i] in. broad, entire 

 or with shallow crenations or very bluntly 



toothed 8. gcmmijcrnm. 



Leaf tapering from a wide base, coriaceous; 2 to 3- 

 pinnate; pinnules linear or cuneate; venation sub- 

 flabellate. 

 Leaf 3 to 9 in. long. 2 to 6 in. broad, deltoid. 



9. adia)itui)!-)iigrui}j. 



