The Arboretum Robert Ruffier-Lanche (3 hectare) is an arboretum located on the campus of the Université Grenoble Alpes at 2233 rue de la Piscine, Saint-Martin-d'Hères, Isère, Rhône-Alpes, France. It is open daily without charge.
The arboretum was created in 1966 beside the Isère by Robert Ruffier-Lanche, head gardener of the Jardin botanique alpin du Lautaret. After some years of neglect, its restoration began in 1999. Today the arboretum contains over 200 species of trees and shrubs from temperate environments around the world, including particularly fine specimens of Davidia involucrata, Paulownia tomentosa var tsinlingensis, and Quercus rugosa.
It also contains a scaled model representation of the Solar System.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction