. Our ferns in their haunts [microform] : a guide to all the native species. Ferns; Fougères. 356 TUli SliNiJlTIVli AND OSTRICH FbRNS. DHuiilobaUi wliLTc tliis author obtained his specimens. In the fourth edition of Amos lialon's botany published in 1834, the author says: " Tiie leaflets slowly ap- proach cacli other on squeezing the stenj in the ; Many observers will testify that they cannot be made to do so in these %(.#^^;^_ degenerate days. The species is some- ^ r .ftir^ limes called oak fern or oak-leaved fern. In some ancient botanical works it is mentioned as " drag
. Our ferns in their haunts [microform] : a guide to all the native species. Ferns; Fougères. 356 TUli SliNiJlTIVli AND OSTRICH FbRNS. DHuiilobaUi wliLTc tliis author obtained his specimens. In the fourth edition of Amos lialon's botany published in 1834, the author says: " Tiie leaflets slowly ap- proach cacli other on squeezing the stenj in the ; Many observers will testify that they cannot be made to do so in these %(.#^^;^_ degenerate days. The species is some- ^ r .ftir^ limes called oak fern or oak-leaved fern. In some ancient botanical works it is mentioned as " dragon's bridges," though for what reason, no one seems to know, Tiie sensitive fern is abundant in nearly fi*il* '''* ^''^ territory from Canada to the (iulf ^5^ of Mexico and west to tlie Mississippi. Scatteretl colonics occur as far west as Wyoming, and the same species is again noticed in Japan. In Montana, this species, or one exceed- ingly like it, has been found as a fossil. Growing with normal fronds, there is often found a form between fertile and sterile. It was once considered to be a permanent type and given the varietal name of ohttisilolhita, but it is now known to be due merely to the destruction of the early sterile fronds. It usually contains less leaf than the ordinary sterile frond and in cutting resembles the twice pinnate fertile one. Commonly it bears a few abortive sori, all of which sliow it to be a partially transformed fertile frond. Prof. Geo. V. Atkinson, who made cxtrnsive experiments with this j)Iant, found tliat he was able to produce the variety at w ill, by simply cutting off the early sterile 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 Clute, Willard N. (Willard Nelson), 1869-1950. Toronto : W. Briggs
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