6,926 research outputs found
The Scrophulariaceae of Iowa
The Figwort family comprises nearly 2,500 species, which are grouped in about 165 genera. The species are quite widely distributed, but are most abundant in temperate regions, occurring rarely towards the poles and equator. Heller, in his Catalogue of North American Plants, includes 51 genera and 627 species and varieties belonging to the Figwort family. The flora of Iowa has representatives of 21 genera, there being about 45 species
The Juglandaceae of Iowa
The walnut family comprises six genera and about 35 species. Only two genera occur in Iowa, namely, Juglans (Walnut) and Hicoria (Hickory), and these two genera are represented by two and five species respectively. From an economic point of view the species are valuable and consequently have been largely utilized until but few specimens of the older forest remain. The younger growth is hardy and will, if spared, eventually yield fair returns
The Fagaceae of Iowa
The oak family comprises five genera and 375 species. The family is of wide geographical distribution, and from an economic point of view, of very great value. Four genera occur in the United States, namely, Fagus (the Beech), Castanea (the Chestnut), Quercus (the Oak), and Castanopsis. The number of species and varieties recognized is 87. Of this number 82 belong to the genus Quercus, one each to Fagus and Castanopsis, and three to Castanea. The only genus indigenous to Iowa is Quercus, the oak, and the number of species recognized is 15
Betulaceae of Iowa
The Birch family as now understood, comprises six genera and about seventy-five species, mostly natives of the northern hemisphere. Some authors include this family with the Oak or Beech family under the name of Cupuliferae. The chief distinction is the arrangement of the pistillate flowers. The Birch family has the pistillate flowers in aments while the Oak family has the pistillate flowers subtended by an involucre which becomes a bur or cup in fruit
The Orchidaceae of Iowa
The Orchidaceae comprises 5,000 species distributed among 410 genera. The species are mostly tropical but are found in temperate climates, one as far north as the 68th degree of latitude. The orchids are of especial interest to lovers of flowers because of their great beauty, peculiar forms, sweet fragrance and strange habits, and are great favorites with floriculturists in the old world as well as in the new
The Genus Viburnum in Iowa
Our Viburnums are few in number of species and rapidly becoming scarce in the number of individuals. They are to be found in the wooded portions, mostly eastern, of the state. The fruits of some are edible but have not been considered promising enough to warrant cultivation
Flora of Southern Iowa
The following notes are based upon collections in our private herbarium. In point of time the period reaches from 1882 to 1897. The counties represented being Decatur, Appanoose, Wapello, Van Buren, Shelby, and Johnson, extended by occasional collections from neighboring counties
The Flora of Southern Iowa
On June 20, 1898, the first writer of this article started over land from Lamoni to Council Bluffs, in company with Prof. J. T. Pence. The route taken passed through the west side of Decatur County to Hopeville, in the southwest part of Clarke County, thence bearing west to Afton in Union County, on to Creston in the same county. As near as practicable the line of the Chicago, Burlington & Quincy railway was followed through Adams County, bearing southward with the railway to Villisca and northward to Red Oak in Montgomery County. From Red Oak a nearly northerly direction was taken until into Pottawattamie County, then westward to Wheeler and north westward to Carson, where the overland trip, as far as this article is concerned, ended. Carson was reached June 24th. The five days of the journey were filled with frequent stops in order to collect by the wayside and from adjoining groves and fields. A week was spent at Carson collecting in the immediate vicinity and in Wheeler\u27s grove
The effect of material cyclic deformation properties on residual stress generation by laser shock processing
Integrating Cognitive Science with Innovative Teaching in STEM Disciplines
This volume collects the ideas and insights discussed at a novel conference, the Integrating Cognitive Science with Innovative Teaching in STEM Disciplines Conference, which was held September 27-28, 2012 at Washington University in St. Louis. With funding from the James S. McDonnell Foundation, the conference was hosted by Washington University’s Center for Integrative Research on Cognition, Learning, and Education (CIRCLE), a center established in 2011. Available for download as a PDF. Titles of individual chapters can be found at http://openscholarship.wustl.edu/circle_book/.https://openscholarship.wustl.edu/books/1009/thumbnail.jp
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