File:Contributions in geographical exploration (1920) (14781019112).jpg

Identifier: contributionsing00ohiouoft (find matches)
Title: Contributions in geographical exploration
Year: 1920 (1920s)
Authors: Ohio State University
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Publisher: Columbus
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: MSN

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. The birch, (B. kenaika), the Alaskan representative of our paper birch, has suffered only less severely than the alder. Throughout the main valley it was destroyed, but in the more sheltered conditions of Soluka Valley new sprouts from the roots are fairly abundant. The Alaska willow, (Salix alaxensis), suffered less than any other tree. In many places it has, in fact, almost completely recovered from the effects of the eruption. This is probably due to its capacity for forming adventitious roots on burial. (See below, pages 2()()-202). The other willows. Salix nuttallii, Salix barclayi, and Salix bebbiana have also recovered to a considerable extent, though their new growth is much less luxuriant than in Salix alaxensis. Salix nuttallii in particular shows an interesting reaction of tops as well as roots. (See page 201.) * The writer wishes to extend his thanks to Messrs. Paul C. Standley and A. S. Hitchcock of the National Herbarium, who kindly verified the determinations of the plants collected.
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Photograph by R. F. Griggs. A DEVIL CLUB GROWING THROUGH THE ASH. This plant has developed the two storied root system, characteristic of the buried vegetation. One set is just beneath the surface, another in the old soil. The three layers of the ashfall show well. Lower Katmai Valley— ashfall 20 inches. Jan., 1919) Effects oj the Eruption on Vegetation 189 HERBAGE INJURICD Li:SS UlAN TREES. Beneath the trees, the ground is for the most part absolutely bare. Wherever the ashfall amounted to three feet or more nothing could come through. Apparently there were no surface cracks as around Kodiak. At least no evidence of them remains, and the ash near the volcano was so much coarser grained than that deposited at a distance that mud cracks would hardly be expected. Consequently, conditions were much less favorable for the penetration of the ash by the buried herbage. But, although the herbage was almost completely smothered by the ashfall, there is good reason to believe that it suffered less

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