Saxifraga pennsytbanica. (Name means rock - breaker, from many species growing in clefts of rocks.) - Family, Saxifrage'. Flowers, perfect, with 5 greenish petals, a 5-parted calyx with lobes recurved. Stamens, 10. Styles, 2. Flowers clustered in cymes or panicles. Leaves clustered at the root, rather large to 8 inches long, obscurely toothed, upon short, broad petioles. Those on stem smaller, alternate.