Narrow-leaf owl-clover is a slender annual wildflower with erect, unbranched stems from 10-35 cm high. The leaves are narrowly lance-linear and range from 2-6 cm long. The margins are entire although the upper leaves may be 3-cleft. The leaves are all found on the stems.

The inflorescence is not very attractive. It is narrow and elongate with the bracts becoming increasingly cleft up the stem. The calyx is unequally lobed and the linear corolla is 1-2.5 cm long. The corolla is white and trisaccate. The lower lip is larger with yellow markings and smaller purplish spots within. The teeth of the lowerlip are well developed and nearly equal in length to the galea.

Narrow-leaf owl-clover is a wildflower of open meadows, pastures, and grassy slopes.

Narrow-leaf owl-clover may be found from southern Vancouver island to California. It is found west of the Cascades except for the Columbia River Gorge anda population found near Mackenzie Pass in the Oregon Cascades.

In the Columbia River Gorge, it may be found between the elevations of 100'-220' from near the Wind River east to the Deschutes River.

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