File:Contributions from the Botanical Laboratory, vol. 7 (1892) (20678697982).jpg

Title: Contributions from the Botanical Laboratory, vol. 7
Identifier: contributionsfro07univ (find matches)
Year: 1892 (1890s)
Authors: University of Pennsylvania. Botanical Laboratory
Subjects: Botany; Botany
Publisher: Philadelphia : University of Pennsylvania Press
Contributing Library: Penn State University
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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> Y Ecology. 280 JOHN W. HARSHBERCKR Ecology. Vol. X, No. 3 vanishing snow, angh and white flowers It occurs from Mt. Shasta north to Alaska on high mountam slopes near perpetual snow. The above notes represent observations on plants col- lecte<l by the writer. There are many other noteworthy snow-patch plants which would repav investigation. The season of' 1926 was unusual on Mt. Rainier in that the snow dis- appeared from the greater part of the mountain near Paradise Valley early in Tnly The growing season was unusually long, and many plants which normally produce their flowers in July were already in fruit in that month. For example, Sorh„s orchlcntalls Greene (PI. \TI. 5) had not only flowered, but was in fruit on July I, when it was observed as an unusual spectacle. The young coniferous trees had also a better chance for growth, for they were entirelv uncovered, while in other years some of them are under the snow even in midsummer. The early i.lants. with delay in the disappearance of the snow, flower at the same time as the later ones; but in July, 1926, not only the flowers had blossomed and fruited, but the later ones were speedily attaining those conditions. Phenological observations of this kind are im- portant, and should be undertaken with the flora of Mt. Raimer. Conclusions This preliminary account of .American snow-patch plants has been written to arouse interest in a field of botanical inquiry which has been neglected bv American botanists and ecologists. The investigation is o sufficient in- terest and importance for especially e<iuipped parties to undertake in d.fterent Darts of North and South America. Its economic importance lies in the influence of snow cover on the supply of water which is available for the crrowth of crops in the valleys below the mountain ranges. Any research which will throw bght upon the water supply in relation to irrigation is to be welcomed. SUMM.\RV No study has been made of American snow-patch plants, although the subject has received the attention of European botanists since 1812. Pre- hminarv notes are given of the plants which are found associated with the linc-erinc fields of snow (schneetalchen) in the White Mountains, and m the"mountains of Glacier National Park and Mount Rainier, where the con- ditions are favorable for the investigation of the ecological factors which are influential in the growth, flowering and fruiting of plants covered for long iieriods by snow. <* »: J .•M- 4 Vol. X. Plate VII *5:
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I'^n;. I. Small icchcrt;.>^ in Icehcrir Lake, (ilacicr Xational Park. Jiil> 4. \<)j(). j. 1 lie Alpine Saxifrage. Saxifrafia TaUnici. a.s a sn\\-;>atcli plant on upper ^Imjk'.s . .^ I'lilox lue flowers, upper slopes of Paradise X'alley. Ml. Rainier. lul> lo. !(). 4. .\valanelie lilirs. /:rylhr,>iiiiini nii'iihiiiiini. npprr >lniK> of P.ir.idi-^r \'aIK\, Mt. Rainier, lulv lo. INTENTIONAL SECOND EXPOSURE

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