[Owl-clovers: The Genus Orthocarpus East of the Cascade Mountains of Oregon and Washington]

Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover

Orthocarpus tenuifolius

Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius - Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius

Two close-up images of the inflorescence and corolla of thin-leaved owl-clover as seen along Umatilla National Forest Roat #44 near Cook Spring in southeastern Washington............June 25, 2007.

Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius - Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius

Two close-up images of the inflorescence of thin-leaved owl-clover as seen along Umatilla National Forest Roat #44 near Cook Spring in southeastern Washington..........June 25, 2007.

Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius - Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius

A close-up of the inflorescence of Grand Coulee owl-clover as seen on basalt outcrops above Wilson Creek in central Washington...........June 22, 2006.

Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius - Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius

Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius - Narrow-leafed Owl-clover, Thinleaved Owl's-clover, Thin-leaved Owl-clover: Orthocarpus tenuifolius

Thin-leaved owl-clover as seen atop Sheep Ridge, Umatilla National Forest............June 17, 2023.

Paul Slichter