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Rubus ulmifolius is a species of wild blackberry known by the English common name elmleaf blackberry or thornless blackberry and the Spanish common name zarzamora.It is native to Europe and North Africa, and has also become naturalized in parts of the United States (especially California), Australia, and southern South America.
Progeny from Logan's original plant was introduced to Europe in 1897. A prickle-free mutation of the loganberry, the 'American Thornless', was developed in 1933. The tayberry is a similar raspberry-blackberry hybrid.
It is a thornless perennial up to 30 centimetres (12 inches) tall, woody at the base, but very thin higher above the ground. Flowers are in groups of 1–3, the petals pink, red, or magenta. The fruit is deep red or dark purple, with an unusual hardiness to frost and cold weather conditions. [2] [10] Ripe Arctic raspberry
Common thornless cultivars developed from the 1990s to the early 21st century by the US Department of Agriculture enabled efficient machine-harvesting, higher yields, larger and firmer fruit, and improved flavor, including the Triple Crown, [21] [22] Black Diamond, Black Pearl, and Nightfall, a marionberry. [9]
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Rubus is a large and diverse genus of flowering plants in the rose family, Rosaceae, subfamily Rosoideae, commonly known as brambles. [3] [4] [5] Fruits of various species are known as raspberries, blackberries, dewberries, and bristleberries.
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