Plant Image
Aspen Creek Tr - Sue Smith

Yavapai County Native & Naturalized Plants

Phaseolus angustissimus - slimleaf bean

Synonyms: Phaseolus angustissimus var. latus
Other Common Names: narrow leaf bean, slimleaf limabean
Plant Form: Forb

Family: Fabaceae

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Trifoliate leaf
Aspen Creek Tr
Sue Smith
Trifoliate leaf
Aspen Creek Tr
Sue Smith
Aspen Creek Tr
Sue Smith
Seed pod
Aspen Creek Tr
Sue Smith
Forb Plant Description

Origin: Native   Life Cycle: Perennial   Similar Species: Phaseolus grayanus
General Desc: Twining vine with pink, pea-like flowers and trifoliate leaves; the shape of the leaflets range from narrow to triangular to oval.
Identification notes: Stems trailing or twining, usually longer than 1 foot. Leaves divided into 3 leaflets; leaflets not lobed, smooth margined, narrow, triangular ovate. Flowers purple to pink, in long-stalked clusters arising from leaf axils, 2 to 5 flowers per stalk.
Height: Trailing up to 40 inches


Habitat Description: Often found on mesas and hillsides, among trees or shrubs and ponderosa forest clearings.
Plant Communities: Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 3500 - 7700 feet

Flower Characteristics

Color: Purple to pink     Shape: Irregular in elongated clusters     Tubular: N     Flowering Period: May - Oct
Description: Pea-like flowers to 1/2 inch wide, sometimes appear singly or in elongated clusters. Individual flowers are stemmed, keel petal is distinctly twisted and often yellow-tinged. Sepals toothed.

Leaf and Stem Characteristics

Leaf Color: Dark green     Leaf Type: Compound     Leaf Shape: Triangular     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: No     Spines: N
Leaf Description: Leaflets mostly a narrow triangular to ovate, much longer than wide; a wide range of leaf shapes and sizes exist within this species.

Fruit and Seed Characteristics

Fruit Color: Green to brown   
Fruit Type: Pod
Fruit Notes: A lima bean-like pod, curved into a shape similar to a half-moon.
Seed Notes: Seeds 2 to 3 per pod.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 7.0  
Last Updated: May 10, 2017  
Content Questions/Comments: Email Jeff Schalau  
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