06/06/2017
The Rhododendrons of New England
The genus rhododendron represents more than 1,000 plant species globally, widely distributed across continents between latitudes of 80°N and 20°S in the wild. Each native species is adapted to its respective climate. Many of the rhododendrons we see in the gardens of the northern United States and Canada, however, are hybrids: products of decades of cross-breeding by botanists to combine the attractive colours of species like the Himalayan R. arboreum, and the hardiness of species like the Appalachian-native R. catawbiense.
These hybrids were the pride of their creators, whose skills were popularized when rhododendron fervor swept America at the country's first official "World's Fair," or international trading exhibition in 1876. There, in Philadelphia, merchant Anthony Waterer introduced the nation to over 80 species of rhododendron from across the globe, and work began immediately to breed crowd-pleasing garden plants that could survive the harsh winters of the northern U.S.
The hardy hybrids became known as the "ironclads," and were given colloquial nicknames like 'Mrs. Harry Ingersoll', 'Parsons Grandiflorum' or 'Purpureum Elegans', among others. Many of these breeds remain today throughout the New England region and across the North.
For more, check out Karen Madsen's "In Pursuit of Ironclads."
A brief collection of blooming rhododendrons, after rain in southeastern Massachusetts.