Hedera helix
Common name
Ivy
Synonyms
Hedera helix L. subsp. helix
Family
Araliaceae
Flora category
Vascular – Exotic
Structural class
Lianes & Related Trailing Plants - Dicotyledons
Habitat
Terrestrial. Forest understorey, shrubland, rocky cliffs, open areas where there is some support for its scrambling habit.
Features
Perennial climber with stems woody, stout, becoming erect at flowering, attaching to support with aerial rootlets. Leaves alternate, hairless, dark green or variegated ivory-white, variable shaped (usually shallowly lobed), 3-15 cm long (leaves on flowering stems usually not lobed). Flowers tiny, insignificant, yellowish-green, Mar-May. Berries 5-8 mm diam, purple to black, usually with low viability.
Similar taxa
Not generally confused, but identifying to subspecies can be problematic, many different cultivars exist. Other Ivy species are easily separated. Boston ivy (Parthenocissus tricuspidata) is deciduous and foliage is often dark red. German ivy (Senecio mikaniodes) has thin leaves and yellow flowers in the winter. Cape ivy (Senecio angulatus) has thick fleshy leaves and yellow flowers. Fragrant ivy (Hedera colchica) is sometimes cultivated, this species is very similar to H. helix, but young shoots are always green, and the leaves are often very large and fragrant when crushed.
Flowering
March, April, May
Flower colours
Green, Yellow
Fruiting
August, September, October, November, December
Year naturalised
1873
Origin
temp. Europe, Asia
Etymology
hedera: From the ancient Latin name for ivy.
Reason For Introduction
Ornamental
Life Cycle Comments
Perennial, long-lived and persists over time. Heteroblastic, with the lobed leaves and self-clinging stems juvenile. Adult foliage is usually produced in full sun and the leaves are more orbicular in shape and flowers and fruit are produced.
Reproduction
Reproduces from seed. Ground trailing stems may also take root and a single node is capable of growing.
Seed
Fruit is produced prolifically on mature stems. It is unclear at this stage whether subsp. canariensis produces fruit in NZ. Each fruit contains a 2-3 seeds.
Dispersal
Fruit and seed dispersed by birds. also can spread extensively vegetatively, rooted stems can re-sprout after disturbance.
Tolerances
Tolerant to deep shade, severe frosts and high to low moisture.