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Effects Of Nutrients On Productivity And Morphology Of Typha Angustifolia X Latifolia, V. Bonnewell, D. C. Pratt
Effects Of Nutrients On Productivity And Morphology Of Typha Angustifolia X Latifolia, V. Bonnewell, D. C. Pratt
Journal of the Minnesota Academy of Science
The productivity of natural stands of cattails (Typha latifolia) has been correlated with the amounts of nutrients in the soil and water by Boyd and Hess (Ecology, 51: 296, 1970). The direct effects of varying levels of nitrogen (N), phosphorus (P) and potassium (K) on productivity were examined in our study by growing cattails in Hoagland's nutrient solution. Concentrations of ¼, 1/16, and 1/64 the amount of N present in complete Hoagland's solution (0.01Ml resulted in 63 percent, 48 percent and 26 percent of the dry weight of plants grown in complete solution. Rhizomes used to start plants contained considerable …
Scirpus Validus And S. Acutus: A Question Of Distinctness, Marlyn Miller, E. O. Beal
Scirpus Validus And S. Acutus: A Question Of Distinctness, Marlyn Miller, E. O. Beal
Journal of the Minnesota Academy of Science
An analysis of 32 populations of bulrushes in the Scirpus validus-acutus complex growing in Itasca State Park and prairie ponds to the west indicates that most of the populations are referable to neither S. validus nor S. acutus but, rather, are intermediate in morphology. Further, the supposedly characteristic features by which the two nomenclatural species have been identified are erratically correlated.
A Preliminary Report On The Comparative Morphology Of The Shoot Apex Of Isoetes Macrospora Dur. And Some Effects Of Experimentally Applied Indole-3-Acetic Acid And Gibberellic Acid, Daniel R. Zinda
Journal of the Minnesota Academy of Science
Isoetes macrospora Dur. was found growing in 20 inches to 4 ft. of water in several sandy-bottomed lakes in Itasca County, Minnesota. The pH of the lakes was about 6 and the characteristic tree species of the immediate shorelines were: Thuja occidentalis, Pinus resinosa, Abies balsomea, Populus tremuloides, and Betula papyrifera. Experimental and normal plants were grown submerged in 1-liler beakers in the greenhouse for the 2-week experimental period. The normal shoot apex of /. macrospora is described as having three zones. Zone I, the metrameristem, consists of the superficial layer of initials which divide usually by anticlinal divisions and …