thickets useful plant paliurus spina-christi in natural habitat

autumn background benefit botanical botany branched brown buds bush christ close countryside crown curative day deciduous europe flora foliage forest fruit greece green grow growing grows habitat healing homeopathic its jerusalem leaves medicinal mediterranean mount mountain natural nature olympus outdoors paliurus plant prickly science seeds shrub spinachristi spiny study sun sunny therapeutic thickets thorns tree unusual use useful wild