74 



The Koyul Society, Loudon. 



Aspidium aculealum 

 multifidum. 



Sw. 



Aspidium angulare Willd. 

 foliosum multifidum. 



var. acutifuUum mnUifhlnin. 



Athyrlum niponicum Mett., uoriu 

 form. 



;tlis 



var. cristattim. 



Athyrium Filixfoemina 

 var. percriatatum. 

 var. crucialtim cristaium 

 var. coronaluni. 



IJerii. 



Name, Kesult. 



Nephrodium Oreop>teris Desv. var. Gametophytic budding. 



coronans. Development of archegonial projections. 



Development of cylindrical process from apex 

 of prothallus. 



i Traclieides in cylindrical pro- 

 A . } cess. 



^ ^' ^" ^ Ramenta on cylindrical process. 

 [ Vegetative buds (rare). 

 Gametophytic budding. 

 Development of archegorial projections, 

 Apog^my. f rracheides in prothallus. 



■^ " •' { Vegetative buds (rare). 

 Gametophytic budding. 

 ])evelopment of archegonial projections. 

 . _ / Ramenta on prothallus. 



I e« y- y Vegetative buds (frequent). 

 Gametophytic budding. 

 Development of archegonial projections. 

 No apogamy seeii. 

 Gametophytic budding. 

 Development of archegonial projections. 

 . i Tracheides in prothalloid gn 



F B y- y from archegonial projections. 

 Similar to the normal form, but in additiou a 

 few apogamously produced vegetative buds. 

 Gametophytic budding. 



Development of archegonial projections. kir!^ 

 Development of cylindrical process from apex 

 or from nnder surface of the prothallus. 

 ( Tracheides in process. 

 •j Continuation of process as a leaf, 

 ' Vegetative buds. 

 Gametophytic budding. 

 . _ / Isolated leaf-like growths. 



V S •'' \ Vegetative buds (numerous). 

 Apogamy. Vegetative buds produced on 

 short cylindrical processes before the culture 

 had been watered. 

 After the culture vras watered, normal em- 

 bryos. 



In addition to the species mcntioned in the table above, 

 cultures were madc of crested and nncrested forms of Kephrodium 

 Füix-mas Rieh., representing the three snb-species, which are 

 sometimes distinguished in this country. Some of these (both 

 crested and normal) behaved m a similar manner to the species 

 referred to in the table, though only one instance of apogamy 

 induced by long cultivation has as yet been found. Others 

 (crested and normal forms) produced a single bud on the under 

 side of the prothallus which did not bear archegonia. 



Connecting this latter type of a})ogamy, which agrees witli 

 the description of De Bary and Kny with the more normal 

 prothalli, was one variety, the archegonia of which developed 

 into typical archegonial projections. In the place of the projection 

 nearest to the apex a vegetative bud arose. 



It is possible to draw some general coi-tclusions from this 

 series of cultures. I tis a striking fact that in every one of the 



Apogamy. 



rolypodiuni 

 yrandiceps. 



vulgare L. var, 



Aspidium frondosum Lowe (from 

 the Pits, Royal Gardens, Kew). 



