Grass Wood, Wharfedale cleared through selective felling, many areas of the woodland have the appearance of an early successional stage of advance natural regeneration through mainly saplings of ash, birch and sycamore, this enclosed within a variable canopy of ash, sycamore, beech, oak, and with some birch. Shrubs and small trees in the understorey include bird cherry "Prunus padus", hazel, spindle "Euonymus europaeus", buckthorn "Rhamnus cathartica", wild privet "Ligustrum vulgare", blackthorn "Prunus spinosa" and guelder-rose "Viburnum opulus". The underlying geology ensures that most of the site is well drained, favouring lime-loving plants – the calcicoles. There are, however, localised areas with poorer drainage
Prunus brigantina Prunus brigantina Prunus brigantina, called Briançon apricot, marmot plum, and alpine apricot, is a wild tree species native to France and Italy. It is the only apricot-like "Prunus" species native to Europe. The fruit is similar to the commercial apricot "Prunus armeniaca", and is edible. An edible oil produced from the seed, 'huile des marmottes', is used in France. Unlike the other closely related species known as apricots, the fruit is smooth rather than hairy. "Prunus brigantina" is considered a member of the apricot group, along with "P. armeniaca", "P. mandshurica", "P. mume", and "P. sibirica", but its genetic relationships