The easiest way to tell raspberries and blackberries apart is by the berries and canes. As they mature, the fruits of both change colour from green, to red, to deep purplish black. However, the ripe raspberry forms a cup that slips easily from the receptacle (the central knob or core). In the blackberry the core is part of the ripe fruit. The cross- section of a blackberry cane is a five- pointed star. The raspberry is circular. Also the latter is dusted with a silvery powder that rubs off with the touch of a finger.
Rubus
leucodermis (blackcap raspberry, United States of the Americas only )black
raspberry(usually ditto) white bark raspberry] or blue raspberry-Western
Canada)) is a species of Rubus native to western North America, from British
Columbia, Canada, south to California, New Mexico and Mexico.] It is, of course,
closely related to the eastern black raspberry Rubus occidentalis.
It is a
deciduous shrub growing to 9 feet, with prickly shoots. Like most of the Rubus
family, while the crown is perennial, the canes are biennial, growing
vegetatively one year, flowering and fruiting the second, and then dying. My
grandfather would always bend the old cane over in the fall of the second
year-that way they were easily cleared away and removed in the spring of the
next season). As with other dark raspberries, the tips of the first-year canes often
grow downward to the soil in the fall, and take root and form tip layers which
become new plants; but this trait can also make them very difficult to harvest,
aboriginal peoples often didn't bother. The leaves are pinnate, with five
leaflets on leaves' strong-growing stems in their first year, and three
leaflets on leaves on flowering branches with white and infrequently light
purple flowers. The fruit is ½ to ¾ inch in diameter, red to reddish-purple at
first, turning dark blue to nearly black when ripe.] The fruit has high content
of anthocyanins and elegiac acid.
Black and Blue Raspberries
Not to be
confused with blackberries
Black
raspberry is a sometimes common name for two species of the genus Rubus:
Rubus
leucodermis, native to Western North America
Rubus
occidentalis, native to Eastern North America
A black
raspberry is a small fruit (botanically an aggregate fruit) that weighs between
one and two grams. Almost all commercial production of black raspberries is
from developed cultivars of Rubus occidentalis. Oregon accounts for over 90% of
black raspberry production in the United States.
Black
raspberry plants yield significantly less fruit than their red counterparts and
also commonly suffer from a raspberry mosaic disease complex that gives them
shorter lifespans than other cane berry plants. Because of this, they can be
costly to produce on a large scale.
Food
Because like
the red, black raspberries can be harvested only for around three weeks during
the year, usually starting at the beginning of July, their fresh market
presence is limited. Mostly, black raspberries are made into jams, individually
quick frozen, freeze-dried, or otherwise processed. Black raspberries contain
less sugar and more fibre than most other berries.[citation needed] They can
also be found as an ingredient in ice creams and soft drinks due to their
unique name and the flavour of the berry.
Cancer Research
Black
raspberries have been investigated in relation to the treatment and/or
prevention of colon cancer, oesophageal cancer, and skin cancer
Blackberries and raspberries (Rubus spp.) can resemble
poison ivy, with which they may share territory; however, blackberries and
raspberries almost always have thorns on their stems, whereas poison ivy stems
are smooth. Also, the three-leaflet pattern of some blackberry and raspberry
leaves changes as the plant grows: Leaves produced later in the season have
five leaflets rather than three. Blackberries and raspberries have many fine
teeth along the leaf edge, the top surface of their leaves is very wrinkled
where the veins are, and the bottom of the leaves is light minty-greenish
white. Poison ivy is all green. The stem of poison ivy is brown and
cylindrical, while blackberry and raspberry stems can be green, can be squared
in cross-section, and can have prickles. Raspberries and blackberries are never
truly vines; that is, they do not attach to trees to support their stems.