Dactylorhiza praetermissa England english flowering plant flowers Great Britain Herbaceous plant natural nature orchidaceae plant purple Southern Marsh orchid spike Surrey Terrestrial plant botanic bush flax flax field floral flower flowering green herb herbaceous herbs linaceae linen linum plants summer bed border garden grow growth lush quality success Sussex grassland Greater yellow rattle meadow rare Rhinanthus angustifolius scarce Bird's-nest fungus Neottia nidus-avis orchid pale Plant stem fragrant orchid Gymnadenia conopsea lavender mauve pink spikes wild downland fabaceae Hippocrepis comosa Horseshoe Vetch Leguminosae petal yellow bloom butterfly fence Gaura perennial trellis white petals red stems early purple orchid Hampshire Orchis mascula