. The British fern gazette. Ferns. 6 BRITISH FERN GAZETTE: VOLUME 10PART 1(1968) not materially assist in resolving the problem of the identity of the Asplenium parent of this hybrid because A. adiantum-nigrum and A. billotii are both tetraploid species. However, in the light of what is already known, through the efforts of Dr Molly Walker and Dr Anne Sleep, regarding the origins of A. adiantum- nigrum and A. billotii, the occurrence of a high degree of pairing between the chromosome sets contributed to x Asplenophyllitis microdon by its Asplenium parent does make it very much more probable th
. The British fern gazette. Ferns. 6 BRITISH FERN GAZETTE: VOLUME 10PART 1(1968) not materially assist in resolving the problem of the identity of the Asplenium parent of this hybrid because A. adiantum-nigrum and A. billotii are both tetraploid species. However, in the light of what is already known, through the efforts of Dr Molly Walker and Dr Anne Sleep, regarding the origins of A. adiantum- nigrum and A. billotii, the occurrence of a high degree of pairing between the chromosome sets contributed to x Asplenophyllitis microdon by its Asplenium parent does make it very much more probable that it is A. billotii which is involved. Thus, although there is as yet no direct evidence that the two chromosome sets present in the reduced complement of Asplenium adiantum-nigrum are unable to. FIGURES 5-7: Silhouettes of fertile fronds from Castel, Guernsey. Fig. 5: Asplenium billottii Fig. 6: x Asplenophyllitis microdon. Fig. 7: Phyllitis Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Pteridological Society. [s. l. ] British Pteridological Society
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectferns, bookyear1909
