black-calla

Arum palaestinum is a tuberous herb that sprouts in autumn from a discoid tuber. The plant has a terete petiole and a sagittate to oblong-sagittate leaf-blade. The inflorescence is notable for its spathe, which is greenish to pale brown externally and purple internally, with a lanceolate limb and a black-purple appendix. The species is distributed across the conterminous United States, California, Lebanon-Syria, and Palestine. It is commonly found in open hillsides, field margins, and waste places, especially on limestone-derived and calcareous soils. The plant is also known by several common names, including Solomon's lily, priest's hood, noo'ah loof, and kardi.