Cardamine bulbosa (Schreb.) BSP. - Spring Cress
Family - Brassicaceae
Stems - Erect, herbaceous, from a knobby caudex and fibrous roots, glabrous to sparse hispidulous, green apically, purplish near the base, branching above or simple, to +40cm tall.
Leaves - Alternate. Basal leaves petiolate, typically purplish abaxially. Petioles to +7cm long. Blades ovate, glabrous, with undulate margins, tapering at the base or truncate, to 5cm long, 2.5-3cm broad. Cauline leaves becoming sessile or short petiolate, with a few coarse teeth or entire, lanceolate to oblong-lanceolate.
Inflorescence - Terminal racemes, compact in flower, elongating in fruit. Pedicels glabrous, to 1.8cm long.
Flowers - Petals 4, tapering to the base, to +1.2cm long, 4-5mm broad, white, glabrous, rounded at the apex. Stamens 6, erect. Filaments white, 5-6mm long. Anthers 1.3mm long, pale yellow. Ovary terete, 5mm long, glabrous, yellow-green. Style 1.2mm long. Stigma capitate. Sepals 4, to 4mm long, 1.5mm broad, green, glabrous, with slightly involute margins, oblong-lanceolate, with scarious margins, erect.
Flowering - March - June.
Habitat - Low wet woods, spring branches, wet meadows, pond margins, moist ledges of bluffs.
Origin - Native to U.S.
Other info. - This species can be found basically in the southeastern 1/2 of Missouri. The plant likes to be in or near water and is easily identified by its rather large white flowers.
Photographs taken at Whetstone Conservation Area, Callaway County, MO., 4-28-04.