ON WOODSIA. 255 



EXPLANATION OF TAB. 38 (XI). iw 



riG. 



1 . A native specimen of Woodsia hyperborea, natural 



size. 



2. The stipes and lower part of the frond of the same 



plant, magnified 3 times in diameter. 



3. A pinna of the same plant, magnified 10 diam. 



4. A pinna from another specimen, in which the 



clusters of capsules (sori) are more numerous 

 and confluent, 10 diam. 



5. A single cluster of capsules within their involucrum, 



the membranaceous base of which they entirely 

 conceal, magnified 50 diam. (2500 times in 

 superficies) . 



6. The involucrum spread open, with only one cap- 



sule left in it, magnified 50 diam. 



7. An unripe capsule. "1 



8, 9. Side and back views of a ripe capsule. I magnified 

 10, 11. Capsule opening and entirely burst, [ 50 diam. 

 shedding its seeds. J 



12. A seed magnified 200 diam. 



13. A frond of a cultivated plant of the same species, 



natural size. 



