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Pediomelum tenuiflorum
Pediomelum tenuiflorum
Pediomelum tenuiflorum. Synonyms: Psoralea tenuiflora, Psoralidium tenuiflorum. (Slender-flower Breadroot)
Fabaceae (Pea Family)

Semi-desert. Woodlands, shrublands, sand. Spring, summer.
Six Mile Canyon, east of Gallup, New Mexico, May 3, 2015.

Pediomelum tenuiflorum is primarily a species of the Great Plains but is fairly common in New Mexico and Arizona. The plant forms large clumps to three feet tall from many elongated stems. Notice in the photographs that there may be either 3 or 5 leaflets which are elliptic to mostly oblanceolate. The upper side of the leaflets is glabrous; the lower side is short hairy.

Pediomelum tenuiflorum was first named Psoralea tenuiflora and described by Frederick Pursh from a collection made by Meriwether Lewis "On the banks of the Missouri" in September, 1804. Per Axel Rydberg renamed the plant Psoralidium tenuiflorum in 1919 and in 2009, on the basis of both genetic and morphological characteristics, it was placed in the Pediomelum genus by Ashley Egan and James Reveal.

Photographs at left and below are by Max Licher on the SEINet web site.

Pediomelum tenuiflorum

Pediomelum tenuiflorum. Synonyms: Psoralea tenuiflora, Psoralidium tenuiflorum. (Slender-flower Breadroot)
Fabaceae (Pea Family)

Semi-desert. Woodlands, shrublands, sand. Spring, summer.
Six Mile Canyon, east of Gallup, New Mexico, May 3, 2015.

Delicately blue-violet flowers are about 2 inches long in a raceme of anywhere from 7-21 flowers.

Pediomelum tenuiflorum

Pediomelum tenuiflorum. Synonyms: Psoralea tenuiflora, Psoralidium tenuiflorum. (Slender-flower Breadroot)
Fabaceae (Pea Family)

Semi-desert. Woodlands, shrublands, sand. Spring, summer.
Six Mile Canyon, east of Gallup, New Mexico, May 3, 2015.

The elongating stems can be seen at left bottom of the photograph. The stem at left center shows the white glow of numerous short, stiff hairs (strigose).

 

Range map © John Kartesz,
Floristic Synthesis of North America

State Color Key

Species present in state and native
Species present in state and exotic
Species not present in state

County Color Key

Species present and not rare
Species present and rare
Species extirpated (historic)
Species extinct
Species noxious
Species exotic and present
Native species, but adventive in state
Eradicated
Questionable presence

Pediomelum tenuiflorum

Range map for Pediomelum tenuiflorum