A huge variety of flowers can be found and these change with the season, the altitude and the soil. You will, for example, see a big difference between the flora of the two sides of the Val Ferret, one of which is limestone schist’s and the other granite.
You will find plants at home in the steppe and in sub Mediterranean climate on the arid slopes above Sembrancher, Vollèges, Orsières and Liddes : feather grasses, houseleeks, orchids and aromatic plants like hyssop, absinthe wormwood, oregano and wild thyme. In these habitats plants flower at the first hint of spring.
The old field terraces for cereal growing are full of rare species. Surprisingly it is in the areas that have seen the least fertilizer that the greatest variety is to be found : orchids, corncockles, pheasant’s eye, artemisia…
The hay fields, little fertilized and surrounded by hedges, are full of colour and species not common elsewhere.
The forest too boasts a wide range of trees : Scots pine, mountain pine and juniper bushes colonise the most arid parts: ridges, screes and gullies.
Higher up larches and Arolla pines share the ground with bilberry and mountain cranberry bushes, bearberries and heather. In the mountains, alpines come into their full glory in summer : gentians, saxifrages, knapweeds, edelweiss, wolf’s bane or mountain arnica, genepy, etc...
In the marshy areas orchids, carnivorous plants and other rare species can be found.
photo : Houseleek