Japanese Barberry

Denomination: 'Monomb'
Trade name: Cherry Bomb
Botanical Name: Berberis thunbergii
Applicant/Holder: Monrovia Nursery Company
18331 East Foothill Boulevard
Azusa, California
United States of America
Breeder: Monrovia Nursery Company, Azusa, United States of America
Agent in Canada: Cassan Maclean
336 MacLaren Street
Ottawa, Ontario
K2P 0M6
Tel: 613-238-6404 ext. 223
Application Date: 1999-12-16
Application Number: 99-1991
Grant of Rights Date: 2009-05-15
Certificate Number: 3488
Grant of Rights Termination Date: 2027-05-15

Variety Description

Varieties used for comparison: 'Gentry' (Royal Burgundy) and 'Rose Glow'

Summary: The foliage on the plants of 'Monomb' is moderately dense while it is very dense on 'Gentry'. 'Monomb' has larger leaves than 'Gentry' and smaller leaves than 'Rose Glow'. The leaves of 'Monomb' range from elliptic to spatulate while those of 'Gentry' are obovate to almost orbicular. The upper side of a newly opened leaf of 'Monomb' is brown purple while it is brown red for 'Gentry' and brown purple with red pink splash-like markings for 'Rose Glow'.


PLANT: upright bushy growth habit, moderately dense foliage

STEM: brown red, thin, ribbed
BARBS: light red and green, short

NEW LEAF (UPON OPENING): brown purple
NEW LEAF (FULLY EXPANDED): greyish dark brown with brown purple at base/midrib on upper side, reddish grey with brown green at base/midrib on lower side
MATURE LEAF: alternate arrangement, elliptic to obovate/spatulate, broadly acute to rounded apex with mucronate tip, attenuate base, greyish reddish dark brown on upper side, dark green when shaded, absent pubescence, slightly glossy

Origin & Breeding History: 'Monomb' was discovered as a sport/mutation among a group of container grown Barberry plants of the variety 'Crimson Pygmy'. It was discovered in May 1991 in a cultivated area at Monrovia Nursery Company in Dayton, Oregon, United States. Selection of 'Monomb' was based on its large size, and open, rounded and mounding growth habit.

Tests & Trials: Trials for 'Monomb' were conducted in a polyhouse during the summer of 2007 in St. Thomas, Ontario. The trial included a total of 10 plants each of the candidate and reference varieties. All plants were grown in 7.5 litre containers during the summer of 2007. Observations and measurements were taken from 2 year old plants, 10 plants of each variety, on July 18, 2007. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Monomb' with reference varieties 'Gentry' and 'Rose Glow'

Leaf length (including petiole) (cm)

  'Monomb' 'Gentry' 'Rose Glow'
mean 3.5 3.1 4.3
std. deviation 0.57 0.38 0.36

Leaf width (cm)

  'Monomb' 'Gentry' 'Rose Glow'
mean 1.5 1.2 1.8
std. deviation 0.08 0.12 0.18

Colour of leaf (RHS)

  'Monomb' 'Gentry' 'Rose Glow'
newly opened 183A 182A 183B with irregular 52B/C splash-like markings

Click on image for larger view
Japanese Barberry: 'Monomb' (left) with reference varieties 'Gentry' (center) and 'Rose Glow' (right)

Click on image for larger view
Japanese Barberry: 'Monomb' (left) with reference varieties 'Gentry' (center) and 'Rose Glow' (right)

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