B.x cubensis
Brugmansias which combine the characteristics of three species of the group are listed under this name. The well-known Charles Grimaldi is one of them.
B x candida
B.x candida occurs in the wild on the slopes of the Andes in Ecuador between 1000 and 1500 metres above sea level. It is a natural hybrid of B.aurea x B.versicolor. It has drooping flowers with sometimes very long fringed tips. Its ability to show good flowering behaviour even in less than ideal conditions ensures that, alongside B. suaveolens, it has a reputation as one of the most reliable and strongest flowering Brugmansias. Another not insignificant point is that only this cross can produce double or etaginated flowers.
It is not possible to assign a fruit shape to B. candida, as there are variations between the ovoid aurea fruits and the long versicolour fruits.
B x insignis
B.x insignis is a cross between B.versicolor x B.suavolens. This hybrid occurs in nature and has developed without human influence. Its flowers clearly show the suaveolens part. It is a very thermophilic Brugmansia that only flowers well in very warm summers or in tropical areas. As a relatively high overwintering temperature (not below 12°C) is necessary, only very few specimens are kept by enthusiasts in Europe.
B. aurea
B.aurea originates from the Andean regions of Colombia, Venezuela and Ecuador. B.aurea is very vigorous and has the largest leaves of all Brugs. It is a very robust Brugmansia and its flowers appear even in cool, rainy summers. B.aurea has nodding to almost horizontal flowers with very long flower spikes. The flowers measure between 22 and 35 cm in length. The colours are often white, yellow to orange-yellow. Pink aureas are also found less frequently. The calyx is usually slit 5 times and the constricted part of the corolla tube is completely covered by the calyx. B. aurea has egg-shaped fruits with very large seeds that are covered by a thick cork-like layer.
B. sanguinea
B. sanguinea is native to the high altitudes of the Andes (2000 - 3000 m). The only one of the angel trumpets
Flower of the B. sanguinea
its flowers are not fragrant and have intensely bright colours. This is due to the pollination of the flowers. This is carried out by hummingbirds, which have a weak sense of smell but are characterised by their perception of colours, especially the red spectrum. As can be seen in the illustration, the flower is characterised by its tubular shape, which only widens at the end. The flower edge has relatively short tips that curve backwards. The flowers are very firm due to the strongly protruding veins.
Due to its distribution at high altitudes, it is insensitive to light frosts and will produce new shoots even after a long period of frost when it has frozen back to the wood. In our latitudes, frost resistance should not be relied upon.
On the contrary, if it is too warm in our summers, bud shedding can be observed. Only at relatively constant temperatures - preferably 10 - 15 °C - can the flowers be expected to develop well.
The dispersal of the seeds has also not yet been clearly clarified. Wind dispersal, as with other Brugmansias, seems only possible to a limited extent, as the seeds are heavier than those of other Brugmansias. Animals are suspected to be seed carriers, whether birds or bats have not yet been observed.
In addition to this yellow-red colour variant, there are also unicoloured flower forms in yellow, pink or red. Regardless of the colour, however, caring for these plants is not unproblematic for beginners. Most mistakes are made by watering too frequently and too abundantly. Many plants are literally drowned.