Acta Forestalia Fennica vol. 23 | 1923
Category : Article
The text is a presentation given on the occasion of the yearly meeting of the Finnish Academy of Science and Letters on April 10th 1922. It presents the development of the plant topographic research in Finland with the most influential research and authors and their principal work.
The retrospect covers the publications between 1673 and 1917-
Cajander,
E-mail:
ac@mm.unknown
The article begins on the page 117/122 of the PDF file.
There are many forms of hawkweed in Finland, and they are hard to define, especially for an unexperienced examiner. The phenotype of the plant varies depending its site. The article presents the most typical forms ans subspecies for different regions of Finland.
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Norrlin,
E-mail:
jn@mm.unknown
The article begins on the page 105/122 of the PDF file.
The article deals with the morphology of Hieracia sp. and their research, especially with Pilosella officinarum, also Hieracium pilosella. The article gives an overview of the most common, wide spread or otherwise remarkable forms of the genus of the Pilosella and reports, starting from the smallest areas, about the formula, distribution, abundance and occurrence of them.
The great amount of forms, their high variability and the tendency to hybridize make the definition of the varieties difficult. However, the number of varieties in Finland is estimated to be between 150 and 200. The phenotype of the plant is also to some extent dependent on the site. The numerous forms that belong to the group of Piloselloideae can be divided in to groups: main species and intermediate forms.
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Norrlin,
E-mail:
jn@mm.unknown
The article begins on the page 100/122 of the PDF file.
The article describes the development of collecting botanical knowledge of Finnish vegetation, and the problems that have occurred with the aspirations, to examine the Finnish vegetation and to collect the examples of the species. It also gives recommendations how the future studies on vegetation should be organized.
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Norrlin,
E-mail:
jn@mm.unknown
The article begins on the page 91/122 of the PDF file.
The data has been collected during summer 1867. It examines the moos and lichen species in for regions of Lapland: spruce region, pine region, birch region and fjeld region. The division of the regions is related to the climatic and biological conditions of areas, the first mentioned being the most southern and still suitable e.g. for many grasses. Respective regions have been presented with their general characters and list of species. Finally the findings of different regions are compared.
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Norrlin,
E-mail:
jn@mm.unknown
The article begins on the page 82/122 of the PDF file.
The article is a travel report of the author’s travel from Helsinki to north of Finland. Alongside the description of the travel arrangements, it contains observations about the vegetation of the destinations they visited. The observations are divided into section of “spruce region”, “pine region” and “fjeld region”.
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Norrlin,
E-mail:
jn@mm.unknown
The article begins on the page 27/122 of the PDF file.
The first part of the text deals with a general presentation of the geographical, biological and cultural conditions of the studied areas. The second part presents the characteristics of vegetation classified according the forest types, with lists of species. Forested areas, open lands and swampy areas are dealt with separately. The Saoneshje peninsula is presented separately.
The third part of the text discusses the similarities of the natural conditions between studied area and respective part of Finland. The vegetation and amount of species is clearly more diverse in studied area than in parts of middle-Finland. The study shows that in respect to vegetation Onega-Karelia cannot be seen as a part of the same region than Finland.
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Norrlin,
E-mail:
jn@mm.unknown
The article begins on the page 8/122 of the PDF file.
Data for this paper have been collected during years between 1859 and 1862 in the communes of Asikkala, Hollola, Padasjoki, Lammi and Koski.
The first part of the text deals with a general presentation of the geographical, biological and cultural conditions of the studied areas. The second part presents the vegetation according their habitats; they are classified by the degree of moisture. The last is further classified as forested areas or open lands. The examination concentrates on phanerogams (seed plants).
The characteristics of vegetation of forests, open lands and paludified places (swampy or swamp forming places) are presented with the most influential characters and lists of species.
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Norrlin,
E-mail:
jn@mm.unknown
The text is the opening presentation by the author at his public defence of his doctoral thesis on plant geography of Finland. The text discusses the principles that apply on plant geographical classification of earth with respect to characteristics of vegetation and gives an oversight on the plant geographical work conducted in Scandinavia.
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Norrlin,
E-mail:
jn@mm.unknown
The here published speech of Cajander presents the academic career of J. P. Norrlin as a researcher, teacher and influential person in the Finnish scientific society. It also sheds light on Norrlin’s person and thoughts. The highlights of his scientific merits are presented. There are many extracts of his correspondence included in the article that describe Norrlin’s thoughts and interest.
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Cajander,
E-mail:
ac@mm.unknown