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Articles 53551 - 53580 of 54027
Full-Text Articles in Life Sciences
Bryophytes Of Spy Rock Hollow, Eugene B. Wittlake
Bryophytes Of Spy Rock Hollow, Eugene B. Wittlake
Journal of the Arkansas Academy of Science
No abstract provided.
New Genera And Species Of Millipeds, Nell B. Causey
New Genera And Species Of Millipeds, Nell B. Causey
Journal of the Arkansas Academy of Science
No abstract provided.
Botanical Records Of Field Work In The Southern United States In 1945 And 1947, Rogers Mcvaugh
Botanical Records Of Field Work In The Southern United States In 1945 And 1947, Rogers Mcvaugh
Field and Laboratory
For about three months in 1945, and for a similar period in 1947, I was able to carry on field-work in systematic botany in the southern United States, chiefly in Texas, but with some attention to neighboring states. The work in 1945 was a joint project of Southern Methodist University and the Bureau of Plant Industry, U.S. Department of Agriculture; I was delegated by the Bureau to join field-parties sent out by the University. The work in 1947 was undertaken by the University of Michigan, with the cooperation of Southern Methodist University and of the Arnold Arboretum, Harvard University.
[Note On Cassia Orcuttii], B. L. Turner
[Note On Cassia Orcuttii], B. L. Turner
Field and Laboratory
CASSIA Orcuttii (Britton & Rose) Turner, comb. nov.
Transfer Of Texas Species Of Houstonia To Hedyotis (Rubiaceae), Lloyd H. Shinners
Transfer Of Texas Species Of Houstonia To Hedyotis (Rubiaceae), Lloyd H. Shinners
Field and Laboratory
The accepted species of Houstonia in Texas are a diverse lot, ranging from stiffly branched small shrubs of desert mountains to delicate spring annuals of humid pine and hardwood forests.
Notes On Texas Compositae-Iii, Lloyd H. Shinners
Notes On Texas Compositae-Iii, Lloyd H. Shinners
Field and Laboratory
No abstract provided.
Revision Of Salvia L., Section Salviastrum Gray, Eula Whitehouse
Revision Of Salvia L., Section Salviastrum Gray, Eula Whitehouse
Field and Laboratory
Salviastrum, with S. texanum Scheele as the only known representative, was described as a genus by Scheele in 1849 (Linnaea 22: 584).
The Texas Species Of Conyza (Compositae), Lloyd H. Shinners
The Texas Species Of Conyza (Compositae), Lloyd H. Shinners
Field and Laboratory
The transfer of those species of Erigeron sometimes segregated under Leptilon to the widespread tropical genus Conyza by Dr. Arthur Cronquist (1943) brings together five annual weeds of Texas which are obviously closely allied. They may be distinguished by the following key. Specimens mentioned in the discussion are in the Herbarium of Southern Methodist University.
Nomenclature Of Texas Varieties Of Descurainia Pinnata (Cruciferae), Lloyd H. Shinners
Nomenclature Of Texas Varieties Of Descurainia Pinnata (Cruciferae), Lloyd H. Shinners
Field and Laboratory
In LeRoy E. Detling's Revision of the North American species of Descurainia (Amer. Midi. Nat. 22: 481-520, 1939), the barely distinguishable races of D. pinnata are termed subspecies. The following are credited to Texas, listed here with the proper name as variety. Since a proposal to make mandatory the repetition of the specific epithet for the typical variety of a species has been approved by members of the American Society of Plant Taxonomists, and by a preliminary symposium at Utrecht considering proposals to be submitted to the next International Botanical Congress (see Brittonia 7: 16-17, 1949), no name is proposed …
A Key To The Snakes Of Dallas County, Texas, Lawrence Curtis
A Key To The Snakes Of Dallas County, Texas, Lawrence Curtis
Field and Laboratory
This Key has been prepared as a means of identifying the twenty-nine species and subspecies of snakes definitely recorded from Dallas County, Texas. A previous publication (Curtis, 1949) contains the present-known county distribution, bionomics, and other information of forms here listed.
Fusion 0f Internal Carotid Arteries In The Dogfish, Squalus Acanthias, Joseph P. Harris Jr.
Fusion 0f Internal Carotid Arteries In The Dogfish, Squalus Acanthias, Joseph P. Harris Jr.
Field and Laboratory
No abstract provided.
Notes On Some Tropical American Skippers (Lepidoptera, Rhopalocera, Hesperiidae), H. A. Freeman
Notes On Some Tropical American Skippers (Lepidoptera, Rhopalocera, Hesperiidae), H. A. Freeman
Field and Laboratory
We lack accurate data on the distribution of tropical butterflies in the United States, and even in Mexico and Central America. Several factors contribute to this condition.
Transfer Of Texas Species Of Petalostemum To Dalea (Leguminosae), Lloyd H. Shinners
Transfer Of Texas Species Of Petalostemum To Dalea (Leguminosae), Lloyd H. Shinners
Field and Laboratory
No abstract provided.
The Genus Dalea (Including Petalostemum) In North-Central Texas, Lloyd H. Shinners
The Genus Dalea (Including Petalostemum) In North-Central Texas, Lloyd H. Shinners
Field and Laboratory
The following account relates only to those species definitely known to grow within one or more of the 13 counties surrounding Dallas and Fort Worth.
Notes On Winter Feeding Habits Of North Texas Bobwhites, Fred H. Wagner
Notes On Winter Feeding Habits Of North Texas Bobwhites, Fred H. Wagner
Field and Laboratory
From the viewpoint of the field biologist, Dallas is advantageously situated; for within a radius of less than a hundred miles one may reach six different principal soil types, each the result primarily of its underlying geological formation…. The problem of which this paper is the partial result, was an attempt to note differences or similarities in the feeding habits of bobwhites in these different regions (as affected by the soils through plant relationships.)
William D. Moore (1824-96), Amateur Geologist Of Mississippi, S. W. Geiser
William D. Moore (1824-96), Amateur Geologist Of Mississippi, S. W. Geiser
Field and Laboratory
It is now nearly ninety years since William D. Moore, then professor of English at the University of Mississippi, collaborated with Eugene W. Hilgard on his famous geological report of that State. The archivists and historians have lost Moore from their records (if, indeed, they ever sought seriously for information of him), so that what was written five years ago of W. D. Moore (in another connection) remains as true as it was then: "No record of whence he came, or whither went (when the University closed in 1861), is to be found at the University." Since the present writer …
The Disappearance Of Plant Species From The Range In Texas, V. L. Cory
The Disappearance Of Plant Species From The Range In Texas, V. L. Cory
Field and Laboratory
My study of the range began in 1923. Since then, under conditions of continuous (and often excessive) grazing, I have observed that certain palatable species of range plants have disappeared, and others have been severely reduced in abundance. Doubtless other species vanished before 1923, when I began my observations.
Notes [On Arenaria, Delphinium, And Asclepias], Lloyd H. Shinners
Notes [On Arenaria, Delphinium, And Asclepias], Lloyd H. Shinners
Field and Laboratory
ARENARIA Drummondii Shinners, nom. nov. DELPHINIUM VIRESCENS Nutt. var. Wootoni (Rydb.) Shinners, comb. nov. ASCLEPIAS TUBER0SA L. var. interior (Woodson) Shinners, comb. nov.
A New Elasmosaur From The Eagle Ford Shale Of Texas: Systematic Description, S. P. Welles
A New Elasmosaur From The Eagle Ford Shale Of Texas: Systematic Description, S. P. Welles
Fondren Science Series
The elasmosaurs were marine reptiles, plesiosaurs with extremely long necks and proportionately very small heads. The larger individuals of the Upper Cretaceous attained a length of forty feet, with necks over twenty feet long. Their limbs were so highly modified into paddles that progress on land must have been extremely difficult, if not impossible. Their long sharp teeth indicate a fish-eating habit, and this has been confirmed by the fossilized stomach contents. The fish were evidently gulped down whole and ground up in a gizzard-like organ which contained stomach stones.
Winter Damage And Seed Source Of Planted Pines In Northern Minnesota, Paul O. Rudolf
Winter Damage And Seed Source Of Planted Pines In Northern Minnesota, Paul O. Rudolf
Journal of the Minnesota Academy of Science
No abstract provided.
The Future Of Biology Majors, Mary M. Keeffe
The Future Of Biology Majors, Mary M. Keeffe
Journal of the Minnesota Academy of Science
No abstract provided.
Application Of Schuepp's Method To Form Analysis Of The Shoot Apex In Maize, Otto L. Stein, Ernst C. Abbe
Application Of Schuepp's Method To Form Analysis Of The Shoot Apex In Maize, Otto L. Stein, Ernst C. Abbe
Journal of the Minnesota Academy of Science
No abstract provided.
On Some Grasses, Chiefly Of The Edwards Plateau Of Texas, V. L. Cory
On Some Grasses, Chiefly Of The Edwards Plateau Of Texas, V. L. Cory
Field and Laboratory
In 1885 the condition of my father's health obliged our family to move to a drier climate and a higher altitude. In so doing, we followed the pioneers closely enough to witness the transformation of a prairie country into a Great Plains empire devoted to the growth of a grass called wheat. Among my earliest remembrances is that of a sea of other tall grasses, principally the little blue stem.
New Names Of Texas Chamaesyces, Lloyd H. Shinners
New Names Of Texas Chamaesyces, Lloyd H. Shinners
Field and Laboratory
No abstract provided.
Note On The "Leopoldina," Or "The Imperial German Academy Of Naturalists At Halle", S. W. Geiser
Note On The "Leopoldina," Or "The Imperial German Academy Of Naturalists At Halle", S. W. Geiser
Field and Laboratory
Recently, a professor of entomology sent an urgent letter of inquiry relative to the association of German naturalists called, in the older writings, the "Leopoldina," or, more fully, the "Academia Caesarea Leopoldino-Carolina Naturae Curiosorum." He had read an account of Jacob Boll, early Texan naturalist, and therein had noted his election (March 1, 1873) to membership in the society. The article stated that, in 1873, the Academy had its seat at Dresden, where its Praeses, Heinrich Gottlieb Ludwig Reichenbach had been for many years professor of natural history, and director of the natural history museum. It also stated, mistakenly, that …
Taxonomic Status Of Bulimulus (Mollusca, Gastropoda) In Texas, Clarence Hall, Leslie Pittman
Taxonomic Status Of Bulimulus (Mollusca, Gastropoda) In Texas, Clarence Hall, Leslie Pittman
Field and Laboratory
Careful study of an extended series of the Prairie Snail, Bulimulus, in the Southe1rn Methodist University Collection, reveals so much intergradation between some of the sub specific forms that identification is nearly impossible. We have presented below some of our observations, and the conclusions derived from our study. We hope that they will aid in clarification of the taxonomic position of several questionable subspecies of Bulimulus.
Notes On Texas Compositae-Ii, Lloyd H. Shinners
Notes On Texas Compositae-Ii, Lloyd H. Shinners
Field and Laboratory
No abstract provided.
A New Texan Form Of Castilleja Indivisa Engelm., V. L. Cory
A New Texan Form Of Castilleja Indivisa Engelm., V. L. Cory
Field and Laboratory
On March 28, 1948, while traveling from Sinton to Refugio, I encountered a profusion of the Castilleja which, in its area of distribution, is characterized by large brightred bracts. At a mile northeast of Sinton, in San Patricio County, our collection, No. 54157, was made.
Monarda, Punctata L. Var. Maritima Cory, Var. Nov., V. L. Cory
Monarda, Punctata L. Var. Maritima Cory, Var. Nov., V. L. Cory
Field and Laboratory
No abstract provided.