Bulbous Buttercup

The bulbous buttercup (Ranunculus bulbosus) is easily identified by its swollen, underground "corm" (swollen stem) and petals with downward-curving green leaves (sepals). It blooms from late spring to early summer.

• The Name Game: The scientific name Ranunculus translates from Latin to "little frog," inspired by the plant's traditional preference for damp habitats.

• Physics, Not Pigments: Buttercup petals have a glossy, lustrous shine created by a special air gap beneath their outer layer, which reflects yellow light like a mirror.

• "Do You Like Butter?": The golden reflection seen when holding a buttercup under someone's chin is the origin of its common name, rooted in a historical folklore belief that grazing on the flowers gave cows' butter its yellow color.

• Winter Survival: Unlike many other buttercup varieties, this species survives the winter underground via a swollen base called a "corm". This allows the plant to survive droughts during the summer months.

• Secret Toxins: The bulbous buttercup is one of the most toxic of the buttercups due to a high content of the toxin protoanemonin. This causes animals to instinctively avoid grazing on it when fresh, though the poison degrades and becomes harmless when dried in hay.