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Full-Text Articles in Social and Behavioral Sciences
Summer Soil Temperatures On Algific Talus Slopes In Northeast Iowa, Tom R. Cottrell, Kyle S. Strode
Summer Soil Temperatures On Algific Talus Slopes In Northeast Iowa, Tom R. Cottrell, Kyle S. Strode
Journal of the Iowa Academy of Science: JIAS
Soil temperatures at 15 cm depth were recorded on a single occasion at multiple grid points on two algific talus slopes during the summer of 1999. To represent and compare soil temperatures over a wider area, soil temperatures were measured (less intensively) at five other algific slopes and three non-algific forested slopes. Algific slopes appear to have greater variation in soil temperatures than non-algific sites. Spatial variation in algific slope soil temperatures ranged from 4-25°C. During the 10 day sample period temporal variation in air temperature at a nearby weather station had a similar range. Isotherm plots reveal a heterogeneous …
The Natural History Of Aconitum Noveboracense Gray (Northern Monkshood), A Federally Threatened Species, Margaret A. Kuchenreuther
The Natural History Of Aconitum Noveboracense Gray (Northern Monkshood), A Federally Threatened Species, Margaret A. Kuchenreuther
Journal of the Iowa Academy of Science: JIAS
Aconitum noveboracense Gray (Ranunculaceae), commonly known as northern monkshood, is a federally threatened herbaceous perennial that occurs in disjunct populations in Iowa, Wisconsin, Ohio and New York. It appears to be a glacial relict, existing today only in unique areas with cool, moist microenvironments, such as algific talus slopes. Field studies reveal that A. noveboracense has a complex life history. Perennation of individual plants occurs through the annual production of daughter tubers. Vegetative reproduction is commonly observed, and can occur by means of aerial and subterranean bulbils, as well as by development of adventitious root buds. Populations also reproduce sexually …
Rare Iowa Plant Notes From The R. V. Drexler Herbarium, Jeffery C. Nekola
Rare Iowa Plant Notes From The R. V. Drexler Herbarium, Jeffery C. Nekola
Journal of the Iowa Academy of Science: JIAS
Notes on the distribution, habitats, associated species, and taxonomic considerations for 134 rare Iowa plants are presented. These taxa, including 15 Pteridophytes, 74 Dicots, and 45 Monocots were located during a decade of field research (1979-1989) concentrated in eastern, northeastern, and northwestern Iowa. Included among these are 10 taxa previously unrecorded from the Iowa flora (Carex sterilis, Circaea X intermedia, Cypripedium calceolus var. parviflorum, Lycopodium inundatum, Opuntia macrorhiza, Salix candida X Salix rigida, Salix X clarkei, Solidago uliginosa, Spiranthes ova/is, Viola adunca), and 15 taxa (Angelica atropurpurea, Aristolochia serpentaria, Artemesia frigida, Aster linariifolius, Berula pusilla, Carex conoidea, Eleocharis pauciflora var. …