Phacelia marcescens is an annual herb growing mostly erect to a maximum height near 20 centimeters. It is glandular and coated in short, stiff hairs. The leaves are 1 to 5 centimeters long, oval in shape, and smooth-edged, sometimes with small lobes near the bases of the blades. The hairy
inflorescence is a one-sided curving or coiling cyme of bell-shaped flowers. Each flower is about half a centimeter long and purple in color, often with a paler throat. ==External links==