Everything about Alnus Cordata totally explained
Alnus cordata (
Italian Alder) is an
alder native to southern
Italy (including
Sardinia) and
Corsica.
It is a medium-sized
tree growing to 17–25 m tall (exceptionally to 28 m), with a trunk up to 70–100 cm diameter. The
leaves are
deciduous but with a very long season in leaf, from April to December in the
Northern Hemisphere; they're alternate, cordate (heart-shaped), rich glossy green, 5–12 cm long, with a finely serrated margin.
The slender cylindrical male
catkins are pendulous, yellowish in colour and 5–10 cm long; pollination is in early spring, before the leaves emerge. The female catkins are ovoid, when mature in autumn 2–3 cm long and 1.5–2 cm broad, dark green to brown in colour, hard, woody, and superficially similar to some
conifer cones. The small winged
seeds disperse through the winter, leaving the old woody, blackish 'cones' on the tree for up to a year after.
Like other alders, it's able to
fix nitrogen from the air. It thrives on much drier soils than most other alders, and grows rapidly even under very unfavourable circumstances, which renders it extremely valuable for landscape planting on difficult sites such as
mining spoil heaps and heavily compacted
urban sites.
Further Information
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