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Viburnum
L.
Caprifoliaceae
Royal
Botanic Gardens, Melbourne
Jo
van Berkel and Roger Spencer
BRIEF
HISTORY OF COLLECTION
Collection
origins, major donors or collectors, age of specimens, periods of
major development
etc.
The
Viburnum Collection is a registered OPCAA Collection. The collection
was established in the late eighties as part of a pilot study to
assist in the development of a plant collections record system for
the OPCAA and to solve any problems that might arise. Apart from
providing a display of a wide range of species exhibiting the full
range of ornamental characteristics such as fragrant and attractive
flowers, well textured leaves and ornamental coloured fruit it was
also hoped to perform some breeding experiments to produce some
evergreen ornamental hybrids suited to Australian conditions.
Originally
the collection was situated in the Pterocarya
Bed, next to the toilets above the kiosk. Many of the plants died
due to drainage problems and subsequently the main body of the
collection was relocated to what is now called the Viburnum Bed.
Viburnums can be found throughout the gardens especially in the
Chinese Collection and the Herb Garden. Most of the plants are 5-10
years old, but a few are mature specimens. Terry Smyth's collecting
trips to China in 1992 and 1994 have enabled a number of
wild-collected viburnums to be incorporated into the collection.
HORTICULTURAL
MANAGEMENT NOTES
Brief
summary of information about timing of operations, fertilising
requirements, irrigation requirements, pest or disease problems and
indicators, propagation of particular taxa etc.
Control
infestation of Greenhouse Thrip (Heliothrips
haemorrhoidalis)
Pyrethrum
has been used in the past with some success. It has a lower Poison
Schedule than Folimat (Omethoate). Folimat has been the most
effective at controlling Greenhouse Thrips. The best spraying times
is November and March when numbers begin to increase. Species most
susceptible include V. rigidum,
V. tinus, V. odoratissimum. V. odoratissimum var. awabukii, V.
dentatum, V. suspensum, V. davidii.
Fertilising
requirements
Viburnums
have inferior quality and/or reduced growth when grown with moderate
low levels of phosphorus. (Handreck and Black, 1984, p. 150).
Fertilising is done autumn / spring @ NPK 8:1:4 or an equivalent.
30g/m2= 33 kg for Viburnum Bed.
Magnesium
deficiency
Treatment
of magnesium deficiency on plants showing symptoms (i.e. patchy
yellowing on old leaves, tips and margins cupped). Plants affected include
V. sargentii, V. luzonicum.
Rate-
Magnesium sulfate 20-30 ppm.
Propagation
Generally
semi-hardwood cuttings taken from shoots arising from terminal
vegetative buds with 0.8% IBA (indole butyric acid) inserted in a
mist unit or on a heated bench (21-24%) Deciduous winter flowering
viburnums softwood cuttings in spring and hardwood cuttings in
autumn. Evergreen semi-hardwood basal cuttings taken in autumn.
Propagation mixture two parts peat moss to one part lime free sand.
V.
rhytidophyllum, V. bitchiuense, V. ichangense-
stratified seed 4-5°C
Mulch
Use
RBG mulch in spring/ early summer. Maintain mulch at 75mm
particularly along path opposite Triangle Bed.
Irrigation
Irrigate
Pterocarya and Viburnum
Bed as required. Site adjacent to path opposite
Triangle
Bed and under Acer negundo
'Variegatum'requires additional water supplied
with
a moveable sprinkler in summer.
Snails
Control
snails around emerging hostas in September with MesuroĈ.
Control
Eliminate
/ control germinating Myosotis
sylvatica (Forget-me-Not) using glyphosate
(12ml/L).
SPECIES HYBRIDS AND CULTIVARS IN THE
COLLECTION
Viburnum
betulifolium Batal (2)
Viburnum
bitchiuense Makino (3)
Viburnum
brachybotrryum HcrnsI (1)
Viburnum
burejaeticum Regel & Herder
(5)
Viburnum
carlesii Hemsl (7)
Viburnum
cylindricum D. Don (5)
Viburnum
davidii Franch (3)
Viburnum
dentatum (9)
Viburnum
dentatum var. lucidum
L/Ait.(2)
Viburnum
dilatatum Thunb. (3)
Viburnum
farreri Steam (V.
fragrans) (3)
Viburnum
foetidum Wall. (3)
Viburnum
fordiae Hance (1)
Viburnum
ichangense (Hemsl) Rehd (2)
Viburnum
japonicum (Thunb.) K. Spreng
(23)
Viburnum
lantana L. (6)
Viburnum
lentago L. (3)
Viburnum
luzonicum Roife (4)
Viburnum
macrocephalum Fortune (1)
Viburnum
mongolicum (Pall.) Reho (1)
Viburnum
nudum var. angustifolium
L./Rehd (1)
Viburnum
odoratissimum Ker-Gawl. (8)
Viburnum
odoratissimum var.
awabukii Ker-Gawl.
Viburnum
opulus L. (8)
Viburnum
plicatum 'Mariesii' Thunb. (1)
Viburnum
plicatum var. plicatum
Thunb.
Viburnum
plicatum var. tomentosum
(2)
Viburnum
prunifolium L. (3)
Viburnum
rhytidophyllum Hemsl. (12)
Viburnum
rigidum Venten. (7)
Viburnum
sargentii Koehne (5)
Viburnum
schensianum Maxim. (2)
Viburnum
setigerum Hance (1)
Viburnum
sipboldii Miq. (3)
Viburnum
sp( 12)
Viburnum
taitoense Hayata
Viburnum
tinus L. (69)
Viburnum
trilobum Marsh.
Viburnum
urceolatum Siebold & Zucc.
Viburnum
x burkwoodii (2)
Viburnum
x carlcephalum Hort. (2)
Viburnum
x juddii Rehd
Viburnum
atrocyaneum
Viburnum
macrocephalum f. macrocephalum
(2)
Viburnum
plicatum
REFERENCE
MATERIAL
List
of the most useful references - literature, people, organisations,
etc. for access of information regarding this collection.
Literature
Bartrum,D(1958)
Hydrangeas and Viburnums. John Gifford Ltd.
Bean
WJ (1925) Trees and Shrubs Hardy in the British Isles Vol. IV Ri-z.
Murray.
Griffiths,
M (1992) The New Royal Horticultural Society Dictionary of Gardening
R to Z. Macmillan.
Rehder,
A (1967) Manual of Cultivated Trees and Shrubs. Macmillan Company.
Thomas,
GS (1992) Ornamental Shrubs Climbers and Bamboos. John Murray
US-
RoC Cooperative Science Program (1975) Flora of Taiwan Vol IV:
Angiosperme Epoch Pub. Co.
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