File:Contributions from the Botanical Laboratory, vol. 7 (1892) (20661718516).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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20 JOHN W. HARSHBERGER or ecologist, who attempts to study in a detailed manner the vegetation of Glacier National Park or Mt. Rainier, or in fact any of the western mountains should spend at least one season in acquiring a familiarity with the native plants and the general conditions under which they grow in preparation for more detailed investigation. Although the writer did not adopt this plan in the study of the florulae of the screes in western North America, yet these notes are given to direct attention to an important, but neglected, field of botanical and ecological research with the hope that some scientist more fortunately located will be able to give in the future a more detailed report. I. Scree-wanderers (Schuttwunderer). According toSchroe- ter, the scree-wanderers develop from the crown of the roots numerous long shoots which grow between the rocks and form here and there tufts of leaves and flowers which grow up into the light, and if covered by a landslip are able by their growth to reach the surface again. Apparently to this group belong two plants collected by the writer. Fragaria glauca (Wats.) Rydb., collected on the screes above Lake Agnes in the Canadian Rocky mountains has a deeply penetrating primary root at the summit of which a crown of pentafoliate compound leaves develops. The leaflets are rather thick, 3 to 5 centimeters long, coarsely toothed, silky hairy beneath. It is a perennial herb with long runners (Fig. l) which here and there root in the rock crevices and form small tufts of leaves. Morphologically related to the strawberry, which produces runners, it is well adapted to the talus habitat. Lutkea (Eriogynia) pectinata (Pursh) Ktze. has decumbent or creeping stems which form tufts or mats and leaves at intervals, where the soil pockets between the rocks permit such a development to take place. The small leaves are biternately parted into linear lobes with the flowers. The plant studied by the writer was collected on the rocky upper slopes of Paradise Valley, Mt. Rainier. Lutkea is a plant usually found on the high mountain slopes near per-
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FiG. i.—Frcvjaria glauca (,\\'ats.) Rydb., a scrcc-waiKlcrer.

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