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Index V.1, 1929, Ray C. Friesner
Index V.1, 1929, Ray C. Friesner
Butler University Botanical Studies
Information about the publication, as well as a table of contents.
Key To Genera Of Ferns And Fern Allies, Ray C. Friesner
Key To Genera Of Ferns And Fern Allies, Ray C. Friesner
Butler University Botanical Studies
The keys to be found in the Manuals used for taxonomic study often require the student using them to have a greater knowledge of the species under than is obtainable from the specimen at hand. For example, the indusium regularly drops from the sorus in some genera when the fronds are young, while in other genera, indusia are never present. Examples of these are found, in the case of the former condition, in Cystopteris and Woodia, and in the case of the latter condition, in Polypodium and Phegopteris. How is the student just beginning taxonomic work on the ferns to …
Life-Forms And Biological Spectra Of The Flora Of Bacon's Swamp, Indiana, Alice Phillips
Life-Forms And Biological Spectra Of The Flora Of Bacon's Swamp, Indiana, Alice Phillips
Butler University Botanical Studies
During the nineteenth and the first part of the twentieth century no detailed statistical studies of vegetation in relation to climate had been devised. The work relating to the two was broad, general and superficial. Climatic formations of the world had been described and classified by plant geographers and early ecologists, as Schimper, Warming, Cowles and others. Work was done classifying regions as xerophytic, mesophytic or hydrophytic, but no methods had been published giving means of ascertaining in more detail the degree of xerophytism, mesophytism or hydrophytism. In 1909, C. Raunkiaer, of Copenhagen, Denmark, published a paper on "Life-Forms and …
Some Ecological Factors In Secondary Succession: Upland Hardwood. Ii. Soil Reaction And Plant Distribution In The Sycamore Creek Region, Stanley A. Cain, Ray C. Friesner
Some Ecological Factors In Secondary Succession: Upland Hardwood. Ii. Soil Reaction And Plant Distribution In The Sycamore Creek Region, Stanley A. Cain, Ray C. Friesner
Butler University Botanical Studies
An examination of the vegetation of the Sycamore creek region would certainly warrant the assumption that soils of many of the ridge tops are decidedly acid, for there are a number of plant communities made up of notoriously acid-tolerant species. Conspicuous members of these communities are Vaccinium vacillans, V. stamineum, Gaylussacia baccata, Populus grandidentata, and various mosses, as Polytrichum juniperinum, Catherinea angustata, Leucobryum, Dicranum, etc. Since these communities are exclusively on the tops and upper slopes of the characteristically narrow ridges, it was thought desirable to investigate the extent of the hydrogen-ion concentration of these soils and to ascertain any …
The Genus Trillium In Indiana, Ray C. Friesner
The Genus Trillium In Indiana, Ray C. Friesner
Butler University Botanical Studies
The fact that members of the genus Trillium are quite variable is well borne out when one notes the number of reports of variations and teratological conditions in the literature. Such conditions make it important that more detailed critical study be made of members of the genus from the standpoint of their distribution and variation in smaller areas. Studies of the species occurring in wider areas were made by Gleason (19) and Gates (18). More detailed study of particular species in more restricted areas is of considerable value in adding light to the problem of species relationship and delimitation. Such …
The Relation Of Certain Ecological Factors To The Inhibition Of Forest Floor Herbs Under Hemlock, Rexford F. Daubenmire
The Relation Of Certain Ecological Factors To The Inhibition Of Forest Floor Herbs Under Hemlock, Rexford F. Daubenmire
Butler University Botanical Studies
In the region of Turkey Run State Park, Parke county, Indiana, there occurs an abundance of Hemlock, Tsuga canadensis. In this locality the tree is to be found typically along the upper limits of precipitous creek bluffs and along the rims of the sandstone canyons,-- here it is the dominant plant in an edaphic climax. The Hemlock association is a codominant climax with the typical Beech-Maple climax of the region.