. British ferns and their varieties. h Fern-grower can accept this verdict, since the two species may be foundgrowing side \)y side in the same hedge and yet preserving theirdistinguishing characters intact. It is true that intermediate formsare occasionally found, but to our mind it is far more reasonableto impute these to accidental crosses, owing to the intermingling ofspecies so closely related, or to that remarkable faculty of variationwhich this species has evinced, and as a result of which the bestauthorities have sometimes differed as to which species particular sports belonged. With t
. British ferns and their varieties. h Fern-grower can accept this verdict, since the two species may be foundgrowing side \)y side in the same hedge and yet preserving theirdistinguishing characters intact. It is true that intermediate formsare occasionally found, but to our mind it is far more reasonableto impute these to accidental crosses, owing to the intermingling ofspecies so closely related, or to that remarkable faculty of variationwhich this species has evinced, and as a result of which the bestauthorities have sometimes differed as to which species particular sports belonged. With these remarks we will now describe suchvarieties as are best worthy of mention, ignoring a considerablenumber which have figured in previous works, but which are nowonly recognized as sub-varieties of little or no merit. Acrocladon (Fig. 217).—Found in Devon by Mr. Mapplebeck ;a unique form in the species, fronds branch again and again, thebranches terminating in bunch crests. % V V Mr i&U^ ??/,§•?<?? ? ??. (^ PLATE XXVIII. Polystichum angulnre THE POLYSTICHUMS 19 htih
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1912
