Botany Commons^™

Corallorhiza Wisteriana Conrad, John E. Ebinger

Specimens by Name

No abstract provided.

Bulletin No. 19: Inland Wetland Plants Of Connecticut, William A. Niering, Richard H. Goodwin

Bulletins

24 pp. 1973. Some 40 species of plants found in marshes, swamps and bogs are illustrated.

Claytonia Virginica L., Wayne Pichon, H. Parker

Specimens by Name

No abstract provided.

Temperature Effect On Leaf Water Potential Measurements, Rex J. Prosser

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Silver foil psychrometers were used to monitor water potential in different portions of maize leaves which were subjected to temperature gradients. The psychrometers were preliminarily calibrated over standard NaCI solutions at temperatures ranging from 5°C to 45°C in an aluminum plate apparatus designed to provide uniform temperatures within each psychrometer even while overall temperature was changing. Based on the calibrations, empirical temperature correction equations were derived and used to correct psychrometer readings at different temperatures to equivalent values at 25°C. Temperatures on a single maize leaf were varied by placing the long leaf through an insulated box with several compartments …

Cytogenetic Effects Of Vitavax Fungicide On Secale Cereale On Allium Cepa, Jack Ernest Staub

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of Vitavax fungicide (2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiin) on meiotic chromosomes of rye (Secale cereale) and mitotic chromosomes of onion (Allium cepa) and rye were observed.

The principal aberrations recorded in pollen mother cells of rye were: 1-4 univalents at metaphase I; sticky bridges at telophase I; and micronuclei and misshapen nuclei at the quartet stage.

The principal aberrations recorded in root tip mitoses in onion and rye were: chromosome fragmentation, disintegration, clumping, aggregation and inhibition of mitosis.

All meiotic phases were significantly affected by 1,000, 5,000,10,000, 33,300, 66,600 ppm Vitavax at the 48, 72, and 96 hour …

Vector Preference Among Varieties Of Lycopersicon Peruvianum And L. Esculentum As Related To Curly Top Virus Resistance, Stanford A. Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tests substantiating vector nonpreference as a factor in the ability of certain tomato varieties to escape curly top virus (CTV) infection were conducted and evaluated. Nonpreference is not an effective mode of resistance to CTV in tomatoes under field conditions since leafhoppers feed on and may infect plants before expressing a preference.

Preference of viruliferous leafhoppers was observed on plants of seven tomato varieties arranged both randomly and homogeneously in caged flats. Through observation of curly top symptom development, relative resistance due to vector nonpreference was calculated for each variety.

Up to 23 per cent of the fairly high resistance …

A Comparison Of The Ecological Life Histories Of Delphinium Occidentale S. Wats. And Delphinium Barbeyi Huth, Jere Randolph Holman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two species of the holartic genus Delphinium (D. occidentale S. Wats. and D. barbeyi Huth) were studied in the field and laboratory to determine the factors influencing the life stage development and distribution of these plants.

Delphinium occidentale, more widely distributed geographically and altitudinally than D. barbeyi, is found as a member of aspen and sagebrush communities. Sites are mesic in early spring but turn xeric by midsummer. Delphinium barbeyi, more limited in distribution geographically and altitudinally, appears to be limited to subalpine sites.

Adult biological properties are similar for both species. Morphological and taxonomic differences …

The Seasonal Pattern Of Cavitation In Five Species Of Trees, Herond R. Hoyt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Five species of trees were studied: Acer glabrum (Hook.) Dippel, maple; Betula fontinalis Sarg., birch; Fraxinus pennsylvanica Marsh., ash; Populus tremuloides Michx., aspen; Pseudotsuga menziesii Britton, Douglas Fir. The trees were taken from naturally growing stands, between 20 and 40 years old, and about 7 m tall. The trees were cut down at eight study dates extending over 18 months. A 1.5 m section of stem and a branch from the upper and lower part of the tree were taken to the laboratory. Small pieces were then cut from these large pieces and were subsequently sliced into sections 200 microns …

Low Temperature Germination And Seed Coat Thickness In Tomatoes, John M. Green

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This investigation has been shown that the thin seed coat of tomato variety P. I. 341988 is not the factor responsible for its ability to germinate at low temperatures. The results support a previous report that low temperature germinating ability is inherited as a simple recessive. Seed coat thickness appears to be conditioned by two or more gene pairs, with dominance lacking. The maternal parent's genes control seed coat thickness, but the embryo's genes control low temperature germinating ability.

Viola Triloba Schwein., John E. Ebinger

Specimens by Name

No abstract provided.

Corallorhiza Wisteriana Conrad, Wayne M. Pichon

Specimens by Name

No abstract provided.

Viola Pubescens Var. Eriocarpa (Schwein.) N.H.Russell, W. Pichon, Hampton Parker

Specimens by Name

No abstract provided.

Viola Rafinesquii Greene, W. Pichon, Hampton Parker

Specimens by Name

No abstract provided.

Viola Sororia Willd., W. Pichon, Hampton Parker

Specimens by Name

No abstract provided.

Corallorhiza Wisteriana Conrad, Wayne M. Pichon, Hampton Parker

Specimens by Name

No abstract provided.

Viola Striata Aiton, W. Pichon, Hampton Parker

Specimens by Name

No abstract provided.

Viola Sororia Willd., W. Pichon, Hampton Parker

Specimens by Name

No abstract provided.

Claytonia Virginica L., Larry Dennis

Specimens by Name

No abstract provided.

Viola Sororia Willd., Larry Dennis

Specimens by Name

No abstract provided.

Viola Striata Aiton, John E. Ebinger

Specimens by Name

No abstract provided.

Viola Sororia Willd., John E. Ebinger

Specimens by Name

No abstract provided.

Verbena Urticifolia L., W. Pichon, H. Parker

Specimens by Name

No abstract provided.

Viola Sororia Willd., John E. Ebinger

Specimens by Name

No abstract provided.

Viola Rafinesquii Greene, John E. Ebinger

Specimens by Name

No abstract provided.

Claytonia Virginica L., John E. Ebinger

Specimens by Name

No abstract provided.

Viola Sororia Willd., John E. Ebinger

Specimens by Name

No abstract provided.

Corallorhiza Wisteriana Conrad, Loy R. Phillippe

Specimens by Name

No abstract provided.

Phoradendron Villosum Nutt., Loy R. Phillippe

Specimens by Name

No abstract provided.

The Prairie Naturalist Volume 5, No. 1. March 1973

The Prairie Naturalist

DATES FOR FIRST FLOWERS ▪ O. A. Stevens

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1972 ▪ Robert N. Randall 7

NORTHERN ENVIRONMENTAL COUNCIL CORPORATE AWARD, 1972—RESPONSE ▪ K. A. Carlson

ALGAL ASSOCIATIONS IN NEARSHORE WATERS OF GOLDEN LAKE, A SHALLOW PRAIRIE LAKE IN EASTERN NORTH DAKOTA ▪ Douglas W. Larson

NOTE

Observations of Wintering Bald Eagles at Garrison Dam, North Dakota ▪ Frank A. Splendoria

Vitis Cinerea Noronha, Larry Dennis

Specimens by Name

No abstract provided.