European hackberry typical
Celtis australis subsp. australis
The typical subspecies of the Mediterranean nettle tree, characterized by smooth gray bark and flexible …
Variegated Mediterranean hackberry (Celtis australis f. variegata)
Variegated European hackberry
Variegated nettle tree
Silhouette: T. Michael Keesey
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Celtis australis f. variegata: Rare Variegated Nettle Tree
Celtis australis f. variegata exhibits striking foliage patterns that distinguish it from the typical Mediterranean nettle tree. This botanical form is highly sought after by collectors and botanical gardens for its cream-splashed or margined leaves. Like the parent species, it belongs to the Cannabaceae family and maintains a strong, robust growth habit despite its reduced chlorophyll content.
The form occurs sporadically in nature and in specialized collections. It requires bright, filtered light to maintain its distinctive leaf coloration without scorching.
Taxonomy
- ∟ царство Plantae
- ∟ division Tracheophytes (Vascular Plants)
- ∟ subdivision Spermatophytes (Seed plants)
- ∟ Angiosperms
- ∟ mesangiosperms
- ∟ eudicots
- ∟ Superrosids
- ∟ rosids
- ∟ order Rosales
- ∟ family Cannabaceae (Hemp family)
- ∟ genus Celtis (Hackberry)
- ∟ species Celtis australis (European Nettle Tree)
- ∟ form Celtis australis f. variegata (Variegated Mediterranean hackberry)
Morphology
The defining characteristic of this form is its variegated foliage, which displays irregular patches or margins of creamy white and pale yellow. The leaves are ovate-lanceolate, with rough upper surfaces, soft hairy undersides, and sharply serrated edges. This variegation is caused by a localized lack of chlorophyll in the leaf tissue.
Its structural and reproductive details are typical of the species, though growth is often slightly slower due to the variegation. The flowers and fruits follow the standard pattern of the nettle tree.
- Flowers: Small, greenish, and wind-pollinated, emerging in early spring.
- Fruits: Spherical drupes that turn dark purple or black upon reaching maturity.
Flowering season
Spring
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Name
Dec
Applications
This rare form is primarily grown for its ornamental value in botanical gardens, arboretums, and private collections. Its variegated leaves provide a striking visual contrast when planted against darker foliage.
Additionally, it serves as a valuable subject for genetic and physiological studies regarding variegation stability and photosynthesis in woody plants.
Interesting facts
- Slower growth: Due to the reduced chlorophyll in its variegated leaves, this form grows at a noticeably slower rate than the standard wild species.
- Sun sensitivity: The white portions of the leaves lack protective pigments, making them susceptible to sunburn in extremely hot, direct sunlight.
- Reversion potential: Like many variegated plants, branches can occasionally revert to producing solid green leaves, which must be pruned to maintain the form.
Geography of distribution
- Italy
- France
- Spain
Sources
- POWO: Plants of the World Online (Royal Botanic Gardens, Kew)
- WFO: World Flora Online database
- GBIF: Global Biodiversity Information Facility
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