|Peter Tigerstedt Rhododendron|
Flowers | Trees Index | Trees Graphics | Family Rosaceae | Rhododendrons
All parts of the Rhododendron plant are toxic to humans and their pets. 
|" 'Peter Tigerstedt' is one of nine new extraordinarily hardy rhododendron cultivars, developed through a Finnish breeding program turning up in American and Canadian nurseries. Their development can be traced back to 1935, when a batch of rhododendron seeds arrived at Finland’s Mustila Arboretum, located east of Helsinki. The seeds, originally collected in the mountain ranges of Korea and Japan, produced plants that for many years could not be classified. In 1970, they were identified as R. brachycarpum and given the subspecies name tigerstedtii to honor amateur plant breeder C.G. Tigerstedt, who introduced them.|
Having withstood 49 degrees below zero Fahrenheit at the Mustila Arboretum, R. brachycarpum subsp. tigerstedtii is considered the most cold-hardy of all known rhododendrons." -- --American Gardener, September 2003 .pdf
Rhododendron (from the Greek: rhodos, "rose", and dendron, "tree") is a genus of flowering plants in the Heath Family (Ericaceae). It is a large genus with over 1000 species. Most have very colorful, showy flowers. It includes the plants known to gardeners as azaleas.
Rhododendron grow as shrubs or small trees. The smallest species grows to 10-100 cm tall, and the largest, R. giganteum, has been reported at 90 feet. Leaves are spirally arranged; leaf size can range from 1-2 cm to over 50 cm, exceptionally 100 cm in R. sinogrande. They may be either evergreen or deciduous. In some species the underside of the leaves is covered with scales (lepidote) or hairs (indumentum. Some of the best known species are noted for their many clusters of large flowers. Both species and hybrid rhododendrons (including azaleas) are used extensively as ornamental plants in landscaping in many parts of the world, and many species and cultivars are grown commercially. Most large commercial growers in the United States are located on the west coast.
Rhododendrons are valued in landscaping for their structure, size, flowers, and the fact that many of them are evergreen. Azaleas are frequently used around foundations and occasionally as hedges, and many larger-leafed rhododendrons lend themselves well to more informal plantings and woodland gardens, or as specimen plants. In some areas, larger rhododendrons can be pruned to encourage more tree-like form, with some such as R. arboreum and R. falconeri eventually growing to 10-15 m or more tall.
All parts of Rhododendrons are toxic to animals if ingested. Symptoms include vomiting, diarrhea, hypersalivation, weakness, coma, hypotension, CNS depression, cardiovascular collapse and death. 
Common North American Flowers
A flower is the reproductive structure found in flowering plants (plants of the division Magnoliophyta, also called angiosperms). The flower contains the plant's reproductive organs, and its function is to produce seeds. After fertilization, portions of the flower develop into a fruit containing the seeds.
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