Grass Genera of the World: 728 Detailed Descriptions From an Automated Database

1986 ◽  
Vol 34 (2) ◽  
pp. 223 ◽  
Author(s):  
L Watson ◽  
MJ Dallwitz ◽  
CR Johnston

Three microfiches are presented, carrying detailed descriptions of 728 grass genera, produced from an automated database. The descriptions incorporate compiled data and original observations on over 300 morphological and anatomical characters, including copious original observations on leaf anatomy and features indicative of photosynthetic pathways and C4 types. A classification to subfamily and supertribal levels is appended to the generic descriptions. The organization, availability and potential applications of the computerized database are described.

Author(s):  
Jean-Paul Hettelingh ◽  
Wim de Vries ◽  
Maximilian Posch ◽  
Gert Jan Reinds ◽  
Jaap Slootweg ◽  
...  

2010 ◽  
Vol 6 ◽  
pp. 25-31 ◽  
Author(s):  
Jyoti P Gajurel ◽  
Krishna K Shrestha

About 170 species of Commelina are known from tropical and subtropical regions of the world. Nepal contributes 6 species of Commelina to the world flora. In the present work, taxonomy of all the six species of Commelina reported from Nepal (C. benghalensis, C. caroliniana, C. diffusa, C. maculata, C. paludosa and C. suffruticosa) was studied. Voucher specimens were collected from Central and Eastern Nepal, covering 14 districts. Morphological characters were studied from these collections. Palynological and anatomical characters were also used to see if they are taxonomically important to delimit the taxa within Commelina. Morphological characters seemed promising to delimit the taxa within Commelina. The key identifying characters at species level are modification in root, form of spathe, structure of leaves and seeds, shape of stomata and pollen. Palynological and anatomical characters were also useful, to some extent, in separating some species, but were not significant as compared to morphological data. Some specimens, close to C. benghalensis and C. caroliniana, showed very different characters. Thus further study is needed to confirm their taxonomic status. Key-words: anatomy; flora; morphological characters; palynology; voucher specimens.DOI: 10.3126/botor.v6i0.2907 Botanica Orientalis - Journal of Plant Science (2009) 6: 25-31


2003 ◽  
Vol 60 (3) ◽  
pp. 331-360
Author(s):  
G. L. C. BRAMLEY ◽  
A. WEBER ◽  
Q. C. B. CRONK ◽  
M. H. BOKHARI

Nine species of Cyrtandra (Gesneriaceae) are recognized in Peninsular Malaysia. Three (C. cupulata, C. pendula and C. wallichii) are common and occur more or less throughout the area; C. pendula is also recorded from Singapore. Four (C. dispar, C. gimlettei, C. patula and C. suffruticosa) have more restricted distributions, and two (C. lanceolata and C. stonei) are local endemics. Three species and one variety originally described by Ridley are here reduced to synonymy: C. barbata (=C. cupulata), C. falcata (=C. suffruticosa) and C. rotundifolia (=C. pendula), and C. cupulata var. minor (=C. cupulata). Keys for fieldwork and herbarium use are presented and general information is provided. The appendix by M.H. Bokhari contains descriptions of leaf anatomy for eight of the nine species recognized and a key based on anatomical characters.


1960 ◽  
Vol 92 (8) ◽  
pp. 595-604 ◽  
Author(s):  
C. V. G. Morgan

On the basis of anatomical and ecological differences, Morgan and Anderson (1957) and Anderson and Morgan (1958) divided the Bryobia praetiosa complex of British Columbia into two species; the brown mite, B. arborea M. & A., 1957, found exclusively on fruit trees, and the clover mite, B. praetiosa Koch, 1836, found chiefly on herbaceous plants and known more commonly as a household pea. Acarologists in Switzerland, The Netherlands, and Russia have separated the complex into a number of species principally on anatomical bases (Pritchard and Keifer, 1958). In a recent exhaustive treatise of the complex in Switzerland, Mathys (1957) proposed five species and four ‘forms’.


2001 ◽  
Vol 58 (3) ◽  
pp. 405-422 ◽  
Author(s):  
M. H. BOKHARI ◽  
F. SALES

The stem and leaf anatomy of the ten species of Jasione L. (Campanulaceae) in the Iberian Peninsula were investigated; their infra-specific taxa were also studied. The species differ from each other anatomically and can be identified by their anatomical characters. The anatomical evidence supports the taxonomic treatment that will be published in the forthcoming Flora iberica Volume 14. The possible relations between the anatomy and the ecology of these plants are discussed. Specialized small multicellular structures (trichoids) present on the leaf surface, whose interest has not previously been recognized, are described and their possible function discussed.


Author(s):  
Neenu Kuriakose & Lincy N

It is only a matter of time before technology emerges to open up a whole new world of opportunities. For example, the invention of the Internet was a development like this that changed the world in almost every theory. Blockchain technology is also one of the emerging technological advances that is expected to change the way transactions are conducted, thus affecting a wide range of potential applications. Blockchain is a distributed software network that works both as a digital logger and a method that allows secure transfer of assets without a mediator. Just as the Internet is a technology that facilitates the flow of digital information, blockchain is a technology that facilitates the digital exchange of digital value. Anything from coins to land titles to votes can be token, stored, and exchanged via a blockchain network.


2018 ◽  
Vol 5 (1) ◽  
pp. 59
Author(s):  
Hartono Karim ◽  
Sakka Samudin ◽  
Maemunah Maemunah

This study aims to determine the characteristics of mango plants relied on morphological and anatomical leaf of mango plants in the villages of Nambo and Laroue,subdistrict of East Bungku, Morowali district. An observation of morphological features was conducted in Nambo and Laroue, whereas anatomical observations had been made in the laboratory of Biotechnology, Faculty of Mathematics and Natural Sciences, University Tadulako, from April to July in 2016. The morphological parameters observed includedage of the plant, plant height, stem diameter, canopy diameter, canopy shape and color bars. The alteration of leaf anatomy consists of the size of the stomata, the size of the epidermis, and stomatal index. Moreover, the resulthighlightsmorphological and anatomical characters observed on cluster analysis, described in the form of a dendrogram.The implication of the cluster analysis for two villages resultsin four accessions, namely NM1, NM2, NM15 and LR4 that can be benefited as the planting material of quality mango seeds which will be cultivated.


Author(s):  
Mai Shawkat ◽  
Mahmoud Badawi ◽  
Ali I. Eldesouky

The global pandemic of new coronaviruses (COVID-19) has infected many people around the world and became a worldwide concern since this disease caused illness and deaths. The vaccine and drugs are not scientifically established, but patients are recovering with antibiotic drugs, antiviral medicine, chloroquine, and vitamin C. Now it is obvious to the world that a quicker and faster solution is needed for monitoring and combating the further spread of COVID-19 worldwide, using non-clinical techniques, for example, data mining tools, enhanced intelligence, and other artificial intelligence technologies. In this paper, association rule mining is developing for the frequent itemsets discovery in COVID-19 datasets, and the extraction of effective association relations between them. This is done by demonstrates the analysis of the Coronavirus dataset by using the Apriori_Association_Rules algorithm. It involves a scheme for classification and prediction by recognizing the associated rules relating to Coronavirus. The major contribution of this study employment determines the effectiveness of the Apriori_Association_Rules algorithm towards a classification of medical reports. The experimental results provide evidence of the Apriori_Association_Rules algorithm regarding the execution time, memory consumption, and several associated rules that reflect its potential applications to different contexts. Therefore, the Apriori_Association_Rules algorithm will be very useful in healthcare fields to demonstrate the latest developments in medical studies fighting COVID-19.


2016 ◽  
Vol 34 (3) ◽  
pp. 485-495
Author(s):  
A. ÖZDEMIR ◽  
H. KOCAYIGIT ◽  
K. YETISEN ◽  
Y. AKYOL ◽  
C. ÖZDEMIR

ABSTRACT In the present study, Ornithogalum narbonense, O. montanum, O. wiedemannii, O. sigmoideum and O. lanceolatum species were compared statistically with respect to anatomical characters. Some differences were found in root, stem and leaf anatomy of the species. These differences and similarities were indicated in this study. A big metaxylem was present in all root cross sections, except for O. lanceolatum, which has three metaxylema. 2-3 layered annular type collenchyma were present in all species. Aerenchyma is present in all mesophiles.


Author(s):  
Hamidreza Sadegh ◽  
Gomaa A. M. Ali

High-quality water is one of the most important challenges around the world. Conventional techniques of wastewater treatment need to be developed. Therefore, finding sustainable, environmentally friendly, and efficient treatment techniques is required. In this regard, due to the extraordinary potential of nanotechnology resulted from nanoscale size characteristics, recently nanomaterials have been the subject of novel research and development worldwide. In this chapter, the authors review recent development of the direct applications of nanomaterial as an adsorbent in adsorption systems for integrating nanoparticles into conventional treatment technologies for wastewater treatment, especially a wide range of candidate nanomaterials and its properties. In addition, advantages and limitations as compared to existing processes are discussed.


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