coarse rocket diplotaxis harra growing between limestone boulders in the negev desert

annual arid beige ben boulders brassicaceae brown coarse cruciferae desert diplotaxis ecosystem family four green growing gurion habitat harra harsh highlands hike hiking israel limestone midreshet mustard nahal natural nature negev one petals pink plant red rocket rocks rocky sand sandy seedling single small southern specimen stones trail tsin typical tzin valley vegetation wadi wild wilderness wildflower wildflowers yellow young zin