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Woody > Aesculus > Aesculus hippocastanum > Aesculus hippocastanum 'Baumannii'

Aesculus hippocastanum

'Baumannii'


Baumann Horsechestnut




Origin:  'Baumannii' was discovered as a sport of a branch by A. N. Baumann near Geneva, Switzerland around 1820.
            Mike's Opinion

this is Mike

"

A European cultivar that at maturity becomes quite a regal specimen with its broadly pyramdial-rounded form and branches that ascend to the ground. It is spectacular in bloom. It does not produce the typical chestnut fruit which can be a litter problem as with the species but does suffer from extensive leaf anthracnose late in the autumn; other than being unsightly at this stage it does little to damage the tree. The preferred choice over A.hipposcastanum



Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)

"

Family
Sapindaceae (Hippocastanaceae)
Genus
Aesculus
Species
hippocastanum
Cultivar
'Baumannii'
Category
Woody
Type
Tree (deciduous)
Pronunciation
USDA Hardiness Zone
3
Canadian Hardiness Zone
1
RHS Hardiness Zone
H7
Temperature (°C)
-40 - (-35)
Temperature (°F)
-40 - (-30)
Height
30 m
Spread
15 m
Photographs
Description and Growing Information
Flowering Period
May
General Description
Large palmate leaf, with brown hairs on the upper surface of the leaf axil. Does not produce fruit since the double flowers are sterile. Broadly pyramidal-rounded form with branches ascending to the ground. Spectacular in bloom.
Cultivation
Tolerant of a wide variety of conditions but likes adequate moisture in our summer droughts. Does not like waterlogged soil.
Shape
Large, pyramidal to rounded crown
Growth
Medium
ID Characteristic
A double flowering form of A.hippocastanum that produces sterile flowers and hence no seed litter.
Pests
Extensive leaf blotch (Guignardia aesculi) but does little damage to the tree since it occurs late in the season and hence does not warrant control. Symptoms are irregular brown blotches with light yellow borders, with severe infections causing premature leaf drop. Remove and dispose of all fallen leaves in the autumn, do not compost. Prone to horse chestnut leaf miner ( Cameraria ohridella).
Habitat
Horticultural origin.
Bark/Stem Description
Dark grey, forming large flat plates.
Flower/Leaf Bud Description
Very large, up to 1 cm, globose, acutely pointed, and resinous.
Leaf Description
Large palmate leaf, with brown hairs on the upper surface of the leaf axil.
Flower Description
Double formed flowers in 20 cm panicles held candelabra fashion above the foliage.
Fruit Description
Does not produce fruit since the cultivar is sterile.
Colour Description
Little autumn colour since the tree by this time is severely infected with anthracnose, giving the leaves a rusty apperance and texture. Ugly!
Texture Description
Coarse textured tree.
Notable Specimens
Queen Victioria Park, London, Ontario, Canada. The Gardens of Fanshawe College, London, Ontario, Canada.
Propagation
Grafted on A. hippocastanum rootstock.
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