1,178 research outputs found
The cultivation of clematis species
No full textThe object of this thesis is to describe the processes involved in cultivating Clematis and to present conclusions reached so far from my work on the genus.
I have grown Clematis species for many years and have been fascinated by the simple charm and beauty of the species, which is so often lost in the large-flowered hybrid plants.
I am particularly interested in the evergreen New Zealand species for several reasons:
(a) Though their identity is sometimes in doubt, the cultivation of most overseas, deciduous species is well understood.
(b) Our evergreen species are little considered or grown and are very underrated; they are usually misidentified.
(c) I believe our New Zealand species have much potential in producing a range of evergreen, multi-flowered, scented climbers with restricted growth.
One of the major problems in most gardens is the immense mass of growth made by the commonly grown species
Clematis drummondii
No full textPhotographs in this collection originally appeared in the book "Plants of the Texas Coastal Bend" (2005) by Roy L. Lehman, Ruth O'Brien and Tammy White.Seven color photographs of Clematis drummondii, (also known as old-man's beard), a flowering plant from the Buttercup family found on sandy and clayey loams or caliche in pastures and woods
Clematis occidentalis (Virgen's Bower) : Virgen's Bower
No full textClass: Dicotyledoneae
Family: Ranunculaceae
Genus: Clematis
Species: occidentali
Taxonomic revision of Clematis L. subgenus Clematis (Ranunculaceae) for Latin America and the Caribbean
No full textA revised classification of the Latin American and Caribbean species of Clematis L. subgenus Clematis is presented. Twenty-six species are recognized based on morphological and geographical data. Eight taxa not considered in recent floristic treatments (C. acapulcensis, C. affinis, C. grahamii, C. guadeloupae var. guadeloupae, C. guadeloupae var. medusaea, C. populifolia, C. polygama, C. rhodocarpa) are included. A cladistic analysis of all of the American species of the subgenus supports the division of the group into two subsections within the Section Clematis
A Local Decision Algorithm for Maximum Lifetime in ad Hoc Networks
No full textMobile hosts of ad-hoc networks operate on battery, hence optimization of system lifetime, intended as maximization of the time until the first host drains-out its battery, is an important issue. Some routing algorithms have already been proposed, that require the knowledge of the future behavior of the system, and/or complex routing information. We propose a novel routing algorithm that allows each host to locally select the next routing hop, having only immediate neighbor information, to optimize the system lifetime. Simulation results of runs performed in different scenarios are finally shown
Load Balancing and Computing Strategies in Pipeline Optimization for Parallel Visualization of 3D Irregular Meshes
No full textParallel visualization is assuming an increasing role in the deployment of Web and Grid based systems for scientific applications. The visualization process consists of a set of filters or components that are executed in a pipelined assembly that should be adaptively configured on the basis of user requirements, processing architecture and network characteristics. In this paper we focus our attention on the visualization of 3D irregular meshes produced by the interrogation of volumetric data using an isosurface extraction algorithm. We consider a simplified pipeline consisting of two components: isosurface extraction, and mesh simplification. We show that also in this simple case an in-deep analysis is necessary in order to optimize the whole pipeline. In fact different implementation and load balancing strategies are possible for each single component, but the whole pipeline optimization could be achieved combining non-optimal implementation of individual stages. Moreover the quality of the produced mesh should be considered in the selection of an adequate component implementation. The proposed analysis permits to point out trade-offs and algorithmic requirements that should be considered in the design of a complete visualization system for advanced Grid applications
Cytotoxic triterpenoid saponins from Clematis tangutica
No full textEight previously undescribed oleanane-type triterpenoid saponins, clematangoticosides A-H, together with eight known saponins, were isolated from the whole plants of Clematis tangutica (Maxim.) Korsh. Their structures were elucidated by extensive spectroscopic analysis, in combination with chemical methods (acid hydrolysis and mild alkaline hydrolysis). Clematangoticosides D-G were found to be unusual 23, 28-bidesmosidic glycosides. The cytotoxic activities of all of the isolated saponins were evaluated against the four human cancer cell lines SGC-7901, HepG2, HL-60 and U251MG. Clematoside S, sapindoside B, kalopanax saponin A, and koelreuteria saponin A exhibited cytotoxicity against all of the test cancer cell lines with 1050 values in the range of 1.88-27.20 mu M, while clematangoticoside D and F showed selective cytotoxicity against SGC-7901 with IC50 values of 24.22 and 2135 mu M, respectively. (C) 2016 Elsevier Ltd. All rights reserved
Clematis sp. (Cultivated) 4
No full textClematis sp., fruit. Family Ranunculaceae, Subclass Magnoliidae. Origin: Cultivated
Clematis sp. (Native)
No full textClematis sp., fruit. Family Rosaceae, Subclass Rosidae. Origin: Native
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