adansonia gregorii Australian baobab Australian boab barrel trunk boab boab tree bottle tree brown-gray brown-grey cream dead rat tree deciduous distinctive flower flowers fruit furry gadawon gouty stem tree grotesque indigenous Kimberley native large nut road verge shape slow-growing smooth bark soft fibrous wood trunk useful verge water retention white England english field forest Great Britain green hedge hedgerow landscape meadow spring Sussex trees wild Apulia chalk euphorbia Gargano Italy natural nature Puglia rocks spurge stone stony Cornish cornwall countryside lane narrow road route rural small tiny transport bend Surrey bank primroses Primula roadside sward fresh Stellaria stitchwort