The common name of caltha is marsh marigold. The flowers are golden colored. The flower blooms in spring.
"a, flower of Caltha palustris, showing the petaloid sepals s." -Whitney, 1911
"b, one of the sepals" of the flower of Caltha palustris, or Kingcup. -Whitney, 1911
"Marsh Marigold is a genus of plants having about five petal-like sepals, but no petals; the fruit consists…
Pods generally split lengthwise when ripe and dry.