Flower:

1 to 3 flowers on 3/8-inch stalks arising from leaf axils in the upper plant. Flowers are about ¼ inch across, pinkish to blue, with 5 spreading, oblong petals, one slightly longer than the others and often bent downwards. 4 slender stamens with dark purple tips protrude from the center.

The petals are fused at the base into a tube that is contained within the calyx, which has 5 narrowly triangular, sharply pointed lobes as long as or a little longer than the petals and are hairy on the outer surface. A pair of tiny, leafy bracts is at the base of the calyx.

Leaves and stems:

Leaves are about 1 inch long and 1/3 inch wide, toothless, minutely hairy, lance-elliptic with a pointed tip and tapering at the base to a short stalk. Attachment is opposite, with pairs at right angles to the pair above and below. Stems are branched, 4-sided, minutely hairy, glandular in the upper plant.

Fruit:

Fruit is set of 4 nutlets, each containing a single seed.

Notes:

False Pennyroyal, formerly known as Isanthus brachiatus, is a small statured plant that you don't come across often, but it is fairly common in its habitat. It's habitat is at risk, however, from bedrock mining and invasive species. It is not considered rare, but will probably diminish over time.