Morphological and molecular systematic study of Chondracanthus (Gigartinaceae, Rhodophyta) from Pacific North America

Phycologia ◽  
2008 ◽  
Vol 47 (2) ◽  
pp. 124-155 ◽  
Author(s):  
Jeffery R. Hughey ◽  
Max H. Hommersand
Keyword(s):  
North America ◽  
Systematic Study ◽  
Molecular Systematic

scholarly journals Molecular Systematic Study of Variants of Solanum nigrum L. in India

CYTOLOGIA ◽  
2005 ◽  
Vol 70 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Anil Kumar ◽  
Palpu Pushpangadan
Keyword(s):  
Systematic Study ◽  
Solanum Nigrum ◽  
Molecular Systematic ◽  
Solanum Nigrum L

A systematic study of Salix section Cordatae in North America

1975 ◽  
Vol 53 (15) ◽  
pp. 1491-1522 ◽  
Author(s):  
Robert D. Dorn
Keyword(s):  
New Species ◽  
North America ◽  
Systematic Study ◽  
Diploid Species ◽  
Pollen Grains ◽  
Epidermal Cells ◽  
Chromosome Counts ◽  
Distribution Maps ◽  
Three New Species ◽  
Flavonoid Chemistry

Twelve North American species of the section Cordatae of the genus Salix (willows) were studied to clarify their taxonomy. The sections Adenophyllae (Commutatae) and Wolfianae are included here in section Cordatae. Characteristics of the epidermal cells and pollen grains were of no taxonomic value. Chromosome counts were obtained for 6 of the 12 species. One other species had been counted earlier. There are three diploid species, two tetraploids, and a hexaploid. One other species (?) has both diploid and tetraploid populations. Flavonoid chemistry of the leaves was the most important and constant characteristic. Each species has a consistent combination of compounds different from those of all other species of the section. Cytology, chemistry, morphology, and distribution were well correlated. Keys to pistillate material, synonymy, descriptions, distribution maps, and representative specimens are included. Three new species are described and one varietal transfer is made.

scholarly journals MOLECULAR SYSTEMATIC STUDY OF TWO SOLANACEOUS GENERA DATURA L. AND BRUGMANSIA PERS. BASED ON ITS SEQUENCES OF NRDNA

2018 ◽  
Vol 6 (10) ◽  
pp. 1123-1133
Author(s):  
Dhanya C ◽  
◽  
Shabir Rather ◽  
Devipriya V ◽  
◽  
...  
Keyword(s):  
Systematic Study ◽  
Its Sequences ◽  
Molecular Systematic

Peremistocrinus from the Dewey Limestone Formation, Oklahoma

1948 ◽  
Vol 85 (2) ◽  
pp. 113-116
Author(s):  
Harrell L. Strimple
Keyword(s):  
North America ◽  
Systematic Study ◽  
National Museum ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
James Wright ◽  
North Eastern ◽  
The U.S

The first systematic study of anal variations found among various Carboniferous crinoids was presented by James Wright (Geol. Mag., lxiii, 1926) and covered Eupachycrinus calyx (McCoy) (now Phanocrinus Kirk) and Zeacrinus konincki Bather. Subsequently (Geol. Mag., lxiv, 1927), the genus Hydreionocrinus, and Ulocrinus globitlaris (Geinitz) (now Ureocrinus Wright and Strimple, Geol. Mag., lxxxii, 1945) were also considered. A total of 2,014 dorsal cups from the Scottish Lower Carboniferous (Mississippian) were involved in the examinations. These specimens were all from strata considered equivalent to the Chester Series (upper Mississippian) of North America. When presenting the genus Phanocrinus Kirk (Journ. Paleont., 11, 1937) recognized the importance of Wright's studies, but noted that examination of an almost equal amount of American material (primarily the Springer collection of the U.S. National Museum) had failed to disclose such great variations. That Kirk was highly impressed by Wright's studies is certain, for in personal conversations, several years ago, he emphasized the potentialities as they might affect my impending studies of Pennsylvanian crinoids. It has, therefore, been with much interest that I have watched similar patterns of development appearing in the large collections being made from both Chester (Upper Mississippian = European upper Lower Carboniferous) and Missouri (Middle Pennsylvanian = European middle Upper Carboniferous) of north-eastern Oklahoma.

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