Rhododendron prinophyllum is a Diploid

Rhododendron prinophyllum has been determined to be a diploid using flow cytometry by

Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.

One Rhododendron prinophyllum tested was from a wild population located in Stoddard, New Hampshire.

Rhododendron prinophyllum was also determined to be a diploid using flow cytometry by Dr. Thomas Ranney, J.R. Jones, and Nathan Lynch.

Summary of Ploidy Levels

Diploid Rhododendron prinophyllum

Source: Connecticut College Aboretum
Source: Stoddard Bog, Stoddard, NH
Source: Abbott, Saxton River, VT

John and Sally Perkins