Hedera helix L.

  title={Hedera helix L.},
  author={DANIEL J. Metcalfe},
  journal={Journal of Ecology},
Araliaceae, Schefflereae. Climbing, sometimes reaching 30 m, or prostrate and creeping, forming extensive carpets. Woody stems up to 25 cm diameter, young twigs pubescent with stellate to peltate hairs, and densely furnished with adventitious roots. Leaves petiolate, simple, alternate, exstipulate, coriaceous, glabrous, evergreen; those of climbing or creeping stems 4–10 ( − 25) cm, palmately lobed with 3–5 triangular, entire lobes; leaves of flowering stems 6–10 cm, entire, ovate or rhombic… 

Characteristics of flower nectaries of Hedera helix L. (Araliaceae).

The structure of floral nectaries of ivy (Hedera helix) was investigated under light, scanning, and transmission electron microscopes. The nectar of ivy is located on top of the inferior ovary

Water relations of climbing ivy in a temperate forest

Water relations of adult ivy in a natural, 35 m tall mixed deciduous forest in Switzerland using a construction crane to access the canopy were studied, suggesting that ivy profits strongly from warm sunny days in early spring before budbreak of the host trees and from mild winter days.

Wood anatomy of ivy-hosting black alder (Alnus glutinosa Gaertn.)

Ivy-hosting and non- hosting black alder have a similar woodanatomy in terms of qualitative properties, but in ivy-hosted trees tangential and radial diameter ofvessels are narrower, and inter-vessel pits are smaller, whereas vessel frequency is higher, andray number mm -1 is lower than those of non-Hosting individuals.

Flowering plants of Hedera helix L. in the Grunwald district of the city of Poznań

In the period from September 2008 to July 2009 in the Grunwald district in the city of Poznan, Poland, a total of 609 localities of flowering English ivy were recorded, for which 769 plants were

Chemical Composition of the Essential Oils from Leaves, Berries, and Stems of Hedera pastuchovii

The genus Hedera comprises 17 species of climbing or ground-creeping evergreen woody plants belong to the family Araliaceae [1]. The isolation of saponins from Hedera species and their biological

Branching morphology and biomechanics of ivy (Hedera helix) stem-branch attachments.

Coalescence of woody strands in H. helix ramifications results from accumulation of secondary xylem with age, influenced by mechanical stimuli causing specific loading situations during different growth habits, and fracture toughness of self-supporting H. Helix axes with merged stem-branch attachment regions are comparable to other self- supporting plant species, despite anatomical and ontogenetic differences.

About a tetraploid ivy in Sicily: from autochthonous Hedera to horticultural-invasive-hybrid package?

It would be the first time that tetraploid would be reported in Sicily where it could possibly correspond to an unnoticed autochthonous taxon, and the results let us think it rather represents an invasive which impact on this island rich in endemic species could be considerable.

Host preference and growth patterns of ivy (Hedera helix L.) in a temperate alluvial forest

It is concluded that neighborhood crowding around trees and competition among climbing stems relying on the same trunk may reduce the colonization rate of ivy.

Polyploidy and invasion of English ivy (Hedera spp., Araliaceae) in North American forests

This research characterizes the geographic distribution and phenotypic characteristics of diploid Hedera helix and tetraploidHedera hibernica, European species that are invading North American forests and confirms the taxonomic affinity of invasive plants.

English Ivy (Hedera helix) Control with Postemergence-Applied Herbicides

Surprisingly, two relatively new pyridine herbicides that are used for the control of noxious and invasive species in pastures and rangelands, i.e., aminopyralid and fluroxypyr, were less effective than either glyphosate or 2,4-D.



Arborescent `Treetop' English Ivy

English ivy [Hedera helix L. (Araliaceae)] has been cultivated for centuries as an attractive ornamental ground cover and vine. Foliage is a lustrous dark green with whitish veins. Plants have two

Sur la différenciation des trachéides dans les haustoriums d'Osyris alba parasitant Hedera helix

In the differentiating cambial cells, a first stage of activity of the Golgi apparatus, which is related to the development of the secondary wall thickenings, is evident, marked by the presence of numerous vesicles containing an electron dense material and of multivesicular bodies lying near the plasmalemma.

Changes in Cell Ultrastructure and Zeatin Riboside Concentrations in Hedera helix, Pelargonium zonale, Prunus avium, and Rubus ulmifolius Leaves Infected by Fungi.

A relationship between ultrastructural alterations and ZR content of these plant species (blackberry, cherry, English ivy, geranium) in reacting to this type of biotic stress is suggested and the role of cytokinins as senescence-delaying hormones is confirmed.

Light acclimation in leaves of the juvenile and adult life phases of ivy (Hedera helix)

It is concluded that both life phases of Hedera are capable of acclimating to strong light, but that during the juvenile phase this capacity is not fully developed.

Photosynthesis in frost‐hardened and frost‐stressed leaves of Hedera helix L.

It can be concluded that the inhibition of Standard-Fn after severe frosts is not due to the development of maximal frost tolerance, but rather may be attributed to frost damage to the photosynthetic apparatus.

Age-Related Changes in Trees

  • J. Clark
  • Environmental Science
    Arboriculture & Urban Forestry
  • 1983
Trees are among the largest and most long-lived organisms on earth and are generally recognized as the longest-lived organism on earth with recorded life spans of over 4,000 years.

Photosynthesis in leaves of the juvenile and adult phase of ivy (Hedera helix)

The observed anatomical and photosynthetic parameters of the juvenile and adult ivy leaves resemble those reported for shade and sun leaves, respectively, although the leaves investigated originated from the same light environment.


Interspecific patterns in fruit design were strongly influenced by phylogeny, although no predictable relationship existed between phylogeny and pulp organic composition, although taxonomic diversity had some influence on interspecific variability.