Cloudberries are an arctic berry similar to raspberries and other bramble but closely related to the rose family which inludes strawberries and cherries as well as raspberries. Cloud Berry grows in the coldest regions along the arctic circle - Scandanavia and Russia as well as parts of Alaska and Canada.
They are tart and juicy and not commonly cultivated, although they can be, they generally grow wild. The berries are similar in appearance to Raspberries but are a tad smaller and salmon colored. They are also called yellowberry, knotberry, baked apple berry, averin berry by the Scots, Norwegian Berry in Norway and Salmon Berries  in other places.
Cloud Berries are not self pollinating, at least 2 plants are required to produce fruit. There are male and female plants, so one of each gender is required.
The plants are relatively compact reaching upwards of 10 or 11 inches maximum, but only 3-4 inches in some cases. They may be short on the surface but in the case of roots size matters. They have an extensive root system which can run 5 -6 feet into the ground.
White flowers develop into aggregated pale red bramble style berries consisting of at least 5 drupelets, but on occasion as many as 20 -25. Upon ripeness they turn a vibrant amber.
One primary reason that they are not cultivated to any large extent is that they take upwards of 7 years to bare fruit and then sometimes skip a year, which is not conducive to prosperous farming.
They taste like a cross between a sweet raspberry and a tart green apple, which is perhaps why it is sometimes called the baked apple berry. The seeds are relatively large and noticeable when chewing cloudberries.
A similar genus is Rubus arcticus or Arctic Raspberry.
1. Not to be confused with true Salmon Berry, a different genus 'Rubus spectabilis'