The following 4 photos were taken at night using 2 studio lights with a portable power supply.

The following 4 photos were taken at night using a flash. The plants began flowering about 45 minutes after sunset, photos taken 90 minutes after sunset in total darkness.

Stigma is divided into four linear lobes

The following 2 photos of leaves were taken during the day.

In above photo, leaf underside shown in top half of photo, leaf top side shown in bottom half of photo

Prostrate, stemless plant. Leaves are oblong-lanceolate, long, and deeply incised. Leaf measured at 20 cm long and 4 cm wide. Leaves have a prominent midrib on their underside. Top of leaves with very short hairs, bottom glabrous. Flowers usually open at night, although we have observed one plant in full flower at approx. 10 a.m. on a heavily overcast day. Flowers yellow measured to 2.5 cm wide, petals measured at 12 mm long, stigma divided into 4 linear lobes. The flowers open astonishingly quick, we timed one at night - from a slit in the side of the flower bud with a tiny bit of yellow showing, to fully open, took about 9 minutes.

Rare, listed as an S3 by the Saskatchewan Conservation Data Centre.

Plants measured to 3 cm tall.

Habitat is clay soil on flood plains, sough margins, creek bottoms. Also have observed them in clay soil on roadsides of hills in the Cypress Hills.

Photos taken August 28th, 29th, and 30th, flood plain of Wascana Creek, just outside city limits of Regina, SK.