Alaska, USA (Arizona, California, Colorado, Connecticut, Delaware, Iowa, Idaho,
Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, Minnesota,
Missouri, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New
Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania,
Rhode Island, South Dakota, Tennessee, Utah, Virginia, Vermont, Washington
State, Wisconsin, West Virginia, Wyoming), Canada (Alberta, British Columbia,
Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern
Territories, Nunavut, Ontario, Prince Edward Isl., Quebec, Saskatchewan, Yukon),
St. Pierre et Miquelon, Mexico (Coahuila, Mexico State, Michoacan, Nuevo Leon,
Tamaulipas, Chihuahua, Sonora, Veracruz)
as per Catalogue of Life;


Rubus strigosus, the American red raspberry or American raspberry, is a species of Rubus native to much of North America. It has often been treated as a variety or subspecies of the closely related Eurasian Rubus idaeus (raspberry or European raspberry),[1][2] but currently is more commonly treated as a distinct species.[3][4][5]

R. strigosus is a perennial plant which bears biennial stems (“canes”) from the perennial root system. In its first year, a new stem grows vigorously to its full height of 0.5–2 m, unbranched, and bearing large pinnate leaves with three or five (rarely seven) leaflets; normally it does not produce any flowers. In its second year, the stem does not grow taller, but produces several side shoots, which bear smaller leaves with three leaflets. The flowers are produced in late spring on short racemes on the tips of these side shoots, each flower with five white petals 4–7 mm long. The fruit is 1–1.2 cm diameter, red, edible, sweet but tart-flavored, produced in summer or early autumn; in botanical terminology, it is not a berry at all, but an aggregate fruit of numerous drupelets around a central core.[2][15] 

Many of the commercial raspberry cultivars grown for their fruit derive from hybrids between R. strigosus and R. idaeus; see Raspberry for more details. (From  Wikipedia on 28.9.15)



Rubus idaeus var. strigosus
Commonly cultivated raspberry with red fruits hollow at base.
Photographed from California




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