. Contributions from the Botanical Laboratory, vol. 9. Botany; Botany. Observations, 1931-32 83 H < ip-i P O •J < o o. time only 25 adult plants were seen, although there were numerous young ones. On July 13, 1932, I revisited the locality, this time in company with Mr. J. E. Benedict, Jr., and was glad to find that many of the young plants formerly observed have reached maturity, and at least 85 adult ones were counted in the same area as was pre- viously examined. As before, there was no Walking- fern on those rock ledges, but subsequently Mr. William A. Knight, of Biltmore Forest, N.
. Contributions from the Botanical Laboratory, vol. 9. Botany; Botany. Observations, 1931-32 83 H < ip-i P O •J < o o. time only 25 adult plants were seen, although there were numerous young ones. On July 13, 1932, I revisited the locality, this time in company with Mr. J. E. Benedict, Jr., and was glad to find that many of the young plants formerly observed have reached maturity, and at least 85 adult ones were counted in the same area as was pre- viously examined. As before, there was no Walking- fern on those rock ledges, but subsequently Mr. William A. Knight, of Biltmore Forest, N. C, has informed me that there is a colony on the opposite side of the same stream where this fern does grow with its offspring. Dr. Kestner's Results with Hybrid Aspleniums.— The experiments in growing ferns from spores being carried on by Dr. Paul Kestner of Lausanne, Switzer- land, have already been referred to in this Journal.^ Spores from several of the presumably hybrid Asple- niums from our eastern states have been sent to him for trial, and he has communicated to me the results which form the basis for the following notes. Of all the spores of Aspleniitm ehenoides which he has received from various parts of this country, only those from the above-mentioned Alabama colony have proved to be viable. Evidently in most of its occurrences this fern represents a hybrid, which has not attained fertility; but at this single locality one cross, at some past time, chanced to produce viable spores, and its descendants have remained fertile, so that it has become a true species. The spores of Asiylenium stotleri have germinated well, and a pressed plant only two years old sent me by Dr. Kestner reproduced in a most striking way all the features shown by those in the original colony. It therefore likewise represents a hybrid (presumably of A. pinnatifidum X A. platyneuron) which chanced to 4 Amer. Fern Journ. 19: 60. 1929; 21: 29. Please note that these images are extracted
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