populations and Minnesota, North Dakota, and Iowa herbarium specimens and selection of cultivars. Material and methods Historic (herbaria) reed canarygrass tissue for the pilot experiment was collected from the University of Minnesota Herbarium (Bell Museum of
for out-of-class study to show distinguishing features among plants. We sought to complement existing teaching materials, including live materials (cut, greenhouse, or field), pressed herbarium specimens, and photography with botanical scans
were preliminarily located from geographic coordinates taken from Utah State University (USU) Intermountain Herbarium voucher specimens of the four species. However, the putative Sphaeralcea populations were no longer present at many of the field
root tip collections, selected taxa were propagated and container-grown as described previously. All accessions were identified according to Zaikonnikova (1975) by Hembree. Herbarium specimens for each accession were prepared and deposited in the
, personal communication). Fragaria vesca L. is a European introduction into this region ( Ohwi, 1965 ) and is not native to Sakhalin, Hokkaido, or the Kurile Islands. Staudt (1973 , 1989) studied a Japanese herbarium specimen and seedlings of
Abstract
During 1986, 15 cultivar names in unassigned woody genera were registered. Ten of these were dwarf spiraeas. During 1987, eight cultivar names in unassigned woody genera were registered. Herbarium specimens and photographs of the plants will be deposited in the U.S. National Arboretum Herbarium. Anyone who is involved in the origination or introduction of new cultivars of ornamental plants is urged to see that they are registered with a view toward nomenclatural stabilization. A list of International Registration Authorities is avalable from the American Association of Botanical Gardens and Arboreta (AABGA), P.O. Box 206, Swarthmore, PA 19801.
Abstract
Forsythia is a popular plant for the landscape in many regions of the northern hemisphere. Inadequate cold hardiness of flower buds often results in few spring flowers on most cultivars in northern regions. Forsythia mandschurica Uyeki has flowered every year since 1970 at the University of Vermont Horticultural Research Center (3). This species is described in Chinese language with a plate of herbarium specimens and a plant distribution map (2).
Japanese cedar, Cryptomeria japonica (Thunb. ex L.f.) D. Don [Cupressaceae Bartling, formerly assigned to Taxodiaceae Warm.] is increasing in popularity as a landscape plant in the eastern United States. A taxonomic study of cultivars grown in the eastern United States was conducted. Forty-five cultivars were recognized. Each cultivar bears synonymy, a quantitative morphological description newly described from field data, herbarium vouchers, references to original literature and observational notes. A glossary of taxonomic terms relevant to Cryptomeria is presented. A taxonomic key is presented for segregation of cultivars that should assist professional plantsmen in identification of taxa cultivated in the eastern United States.
Edible chia seeds, purchased from the local markets in Guatemala, Mexico, and southern California, were used for species identification, chromosome counts, karyotype construction, and meiotic analyses. Plants raised from those seeds had ovate leaves, dense racemose inflorescences, pale-blue flowers, and were identified from herbarium specimens as Salvia hispanica L. Mitotic analyses of root tips from 50 plants showed 2n = 12—the lowest chromosome number in the genus. Chromosomes were small, ranging from 2 to 3.5 pm. One pair of chromosomes was metacentric (with the long arm: short arm ratio, r = 1.5), four pairs were submetacentric (r = 2.6 to 3.6), and one pair was telocentric (r = 12). Meiosis was regular and six bivalents were observed at metaphase I. Ring and rod bivalents averaged 1.53 ± 1.05 and 4.47 ± 1.05, respectively;