Mahonia aquifolium (Pursh) Nutt. (syn: Berberis aquifolium Pursh; Berberis aquifolium var. juglandifolia Rehder; Berberis fascicularis Sims; Berberis fasciculata Schult. & Schult.f.; Berberis pinnata Banks ex DC.; Mahonia diversifolia Sweet; Odostemon aquifolium (Pursh) Rydb.);
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USA (California, District of Columbia, Georgia, Idaho, Kentucky, Michigan, Montana, New Jersey, New York, Ohio, Oregon, Washington State), Canada (Alberta, British Columbia, Ontario, Quebec), France (I), Italy (I), Austria (I), England (I), Czech Republic (I), Slovakia (I), Montenegro (I), Serbia & Kosovo (I), Croatia (I), Germany (I), Netherlands (I), Hungary (I), Australia (I) (South Australia (I), Australian Capital Territory (I)), Uzbekistan (I) as per Catalogue of Life;
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Mahonia aquifolium (Oregon-grape[4] or Oregon grape) is a species of flowering plant in the family Berberidaceae, native to western North America. It is an evergreen shrub growing to 1 m (3 ft) tall by 1.5 m (5 ft) wide, with pinnate leaves consisting of spiny leaflets, and dense clusters of yellow flowers in early spring, followed by dark bluish-black berries.[5]

The specific epithet aquifolium means “holly-leaved”, referring to the spiny foliage.[6]
M. aquifolium grows to 1–2 m (3 ft 3 in–6 ft 7 in) tall by 1.5 m (5 ft) wide, with pinnate leaves up to 30 cm (12 in) long, each leaf made up of spiny leaflets. The leathery leaves resemble holly and the stems and twigs have a thickened, corky appearance. The flowers, borne in dense clusters in late spring, are yellow, and are followed by spherical dark dusty blue berries, which give rise to the common name “Oregon grape”.[7]
Mahonia aquifolium is a native plant in the North American West from Southeast Alaska to Northern California, and eastern Alberta to central New Mexico, often occurring in the understory of Douglas-fir forests (although other forest types contain the species) and in brushlands in the Cascades, Rockies, and northern Sierras.
In some areas outside its native range, M. aquifolium has been classified as an invasive exotic species that may displace native vegetation.[12][13]
M. aquifolium is a popular subject in shady or woodland plantings. It is valued for its striking foliage and flowers, which often appear before those of other shrubs. It is resistant to summer drought, tolerates poor soils, and does not create excessive leaf litter. Its berries attract birds.[5]
The small purplish-black fruits, which are quite tart and contain large seeds, are included in smaller quantities in the traditional diets of Pacific Northwest aboriginal peoples, mixed with Salal or another sweeter fruit. Today they are sometimes used to make jelly, alone or mixed with salal.[16] Oregon grape juice can be fermented to make wine, similar to European barberry wine folk traditions, although it requires an unusually high amount of sugar.[17] The inner bark of the larger stems and roots of Oregon-grape yield a yellow dye; the berries give purple dye.[18] As the leaves of Oregon-grape are holly-like and resist wilting, the foliage is sometimes used by florists for greenery and a small gathering industry has been established in the Pacific Northwest.
Some Plateau Indian tribes used Oregon-grape to treat dyspepsia.[19]
Certain extracts from Mahonia aquifolium may be useful in the treatment of inflammatory skin diseases such as eczema and psoriasis,[20][21][22][non-primary source needed] although side effects include rash and a burning sensation when applied.[20]
Recent studies indicate that M. aquifolium contains a specific multidrug resistance pump inhibitor (MDR inhibitor) named 5′-methoxyhydnocarpin (5′-MHC) which works to decrease bacterial resistance to berberine in vitro.[23]
(From Wikipedia on 9.9.15)
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Plant for ID-PC-47-30.08.2015 : 5 posts by 3 authors. Attachments (5)
please identify the plant from Wetter, Germany.


Mahonia aquifolium I hope


Mahonia aquifolia



Rosaceae Fortnight Rosaceae plant for ID-PC-35-13.09.2015 : 2 posts by 2 authors. Attachments (2)
please identify the plant in the picture. The shot were taken from Morning Walkers’ Park, Warsaw.

Berberis sp.


Mahonia aquifolium (Pursh) Nutt. ??


Yes, Mahonia aquifolium is possible as per POWO and Wikimedia Commons images.


I would agree, M. aquifolium.


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SK 3350 11 March 2022: 5 very high res. images.

Location: Langton Garden, Romford, UK
Altitude: 15 m.
Date: 26 February 2022
Habit : Cultivated
Which Mahonia ??

Mahonia aquifolium is most likely.


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SK 3379 31 March 2022: 5 very high res. images.

Location: National History Museum, London 
Altitude: 10m.
Date: 27 March 2022
Habit : Cultivated 
Berberis … ??


Mahonia aquifolium… common name Oregon grape.
Some botanists now have this under Berberis.
It is very confusing…you can decide.
The flowers are in almost round balls which is very different to other Mahonia.. where the flowers are in long strings.
It has fabulous blue berries.
I must get some good pics of it to add to my library. it is flowering here as well just now.


 


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References:
Catalogue of Life  
Wikipedia  The Plant List Ver.1.1  IPNI  GRIN  Homeopathy  

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