SPINY IRON PLANT:  Limited to the southern portion of the province, this species prefers sandy poor soil in full sun.  Makes an excellent ground cover - growing 15-30 cm tall with small yellow aster-like flowers.  Leaves are grayish green and woolly with small spines on the margins - hence the common name.  Seeds should be fall sown or moist stratified for 3-4 weeks prior to being direct seeded in spring or started in cell trays.  Cover seeds with just a light dusting of soil.  Mix seeds with 10 parts moist sand or peat in a plastic container and store in the fridge to stratify.  1 of 4 species that occurs in Alberta.   100 seeds.    NF773.