Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Phaseolus filiformis, Slimjim Bean

Slimjim Bean flowers range from pink to pink purple. They are large showy pea-like flowers and grow from leaf joints or at stem tips. The fruits are oblong, curved seed pods that open maturity (dehiscent). Phaseolus filiformisSlimjim Bean flowers are very similar to Slimleaf Bean but lack the half-moon shape which can be species diagnosis. Slimjim Bean is also called Desert Bean and Wright’s Phaseolus. Phaseolus filiformisSlimjim Bean fruits are typical legume seed pods. Here, as shown in the photo, the seep pods are curved and open at maturity. The seeds vary from 1 to many and are kidney shaped. Phaseolus filiformisSlimjim Bean has green leaves that alternate along the vine. They are pinnately compound with 3 leaflets. The leaves are deltoid, wide ovate-triangular and generally lobed. Plants have a slender taproot and cylindric or angled stems that branch at the base. Phaseolus filiformisSlimjim Bean prefers rocky soils and grows on slopes, canyons and walls. Slimjim Bean is found at elevations from 1,000 to 4,000 feet (305-1219 m). It is found in the southwestern United States in AZ, CA, NM and TX. It is also native to Baja California and northwest Mexico.  Phaseolus filiformis

Scientific Name: Phaseolus filiformis
Common Name: Slimjim Bean

Also Called: Desert Bean, Wright's Phaseolus (Spanish: Ban Bavi)

Family: Fabaceae or Leguminosae Family

Synonyms: (Phaseolus wrightii)

Status: Native

Duration: Annual or short-lived perennial

Size: Up to 12 inches, low growing vine.

Growth Form: Forb/herb and/or a vine; slender taproot; stems cylindric or angled, branching at base, climbing or twining, erect or prostrate, plant herbage pubescent, minute hooked hairs.

Leaves: Green; alternate; pinnately compound with 3 leaflets, leaves are deltoid, wide ovate-triangular and generally lobed.

Flower Color: Pink, pink-purple; large, showy pea-like flowers, inflorescence a raceme, flowers in clusters from leaf axils or at stem tips (terminal); Fruit an oblong, curved seed pods that open at maturity (dehiscent), seeds hard, 1 or several, seeds reniform in shape.

Flowering Season: October to December or flowers throughout the year.

Elevation: 1,000 to 4,000 feet (305-1219 m).

Habitat Preferences: Rocky soils on slopes and canyons or washes.

Recorded Range: Slimjim Bean is found in the southwestern United States in AZ, CA, NM and TX. It is also native to Baja California and northwest Mexico. In Arizona Slimjim Bean is found in the central and southern portions of the state.

North America & US County Distribution Map for Phaseolus filiformis.

U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Wetland Indicator: No information available.

Threatened/Endangered Information: Seriously Endangered in California; State Rank: S1, S1: Critically Imperiled.

Genus Information: 12 species in Phaseolus in the United States. Recent taxonomic changes have moved several species from the genus Phaseolus to Macroptilium, Vigna and Strophostyles. Worldwide, The Plant List includes 97 accepted species names and a further 45 scientific names of infraspecific rank for the genus.

In the Southwestern United States: Arizona and Texas each have 7 species of Phaseolus, California and Utah each have 1 species, Nevada has 0 species and New Mexico has 6 species. All data approximate and subject to revision.

The genus Phaseolus is one of the most important genera in the Fabaceae family as they are used for cooking in either fresh or dried form. Several species have been cultivated for their beans which are rich in protein and contain iron, thiamin and riboflavin. The genus Phaseolus is native to the Americas.

Comments: Slimjim Bean is closely related to the Garden Beans or String Beans Phaseolus vulgaris and Butter Beans or Lima beans Phaseolus lunatus.

In Southwest Desert Flora also see Slimleaf Bean, Phaseolus angustissimus.

Etymology:
The genus Phaseolus is from the Ancient Greek word "phaselus" meaning a kind of bean with an edible pod. The species epithet filiformis means thread-like, a reference to twining?

Ethnobotany
Unabridged Note: 1 Pinacate people (Sonora, Mexico) eat seeds.
Date Profile Completed: 09/06/2015, updated, 09/14/2015, updated 10/14/2019
References:
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California, as Phaseolus wrightii.
Jepson 2012, Kearney and Peebles 1969; from SEINet on-line. (accessed 11/14/2019)
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - (accessed 11/14/2019)
https://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=PHASE&display=31
1 Alfonso Delgado-Salinas 2012, Phaseolus filiformis, in Jepson Flora Project (eds.) Jepson eFlora,
http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=37632, accessed on November 14, 2019
California Native Plant Society; Rare and Endangered Plant Inventory; Phaseolus filiformis.
http://www.rareplants.cnps.org/detail/1119.html
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 11/14/2019).
http://www.theplantlist.org/1.1/browse/A/Leguminosae/Phaseolus/
Wikipedia contributors, 'Phaseolus', Wikipedia, The Free Encyclopedia, 14 September 2019, 11:03 UTC,
https://en.wikipedia.org/w/index.php?title=Phaseolus&oldid=915627956 [accessed 8 November 2019]
"Phaseolus, Bean Plant". Encyclopædia Britannica. Encyclopædia Britannica Online. Encyclopædia Britannica Inc., LAST UPDATED: Sep 26, 2019 - (accessed 10/09/2019).
https://www.britannica.com/plant/bean#ref1183845
SEINet synonyms, scientific names, geographic locations, general information, (accessed 11/14/2019).
http://swbiodiversity.org/seinet/
ETYMOLOGY: Michael L. Charters; California Plant Names: Latin and Greek Meanings and Derivations; A Dictionary of Botanical and Biographical Etymology; (accessed 11/08/2019)
http://www.calflora.net/botanicalnames/pageAN-AZ.html
Wiktionary contributors, 'phaselus', Wiktionary, The Free Dictionary, 4 August 2019, 10:38 UTC,
https://en.wiktionary.org/w/index.php?title=phaselus&oldid=53812667 [accessed 8 November 2019]
SEINet for synonyms, scientific names, recorded geographic locations and general information
http://swbiodiversity.org/seinet/.
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 09/06/2015).
http://www.theplantlist.org/browse/A/Leguminosae/Phaseolus/

ETYMOLOGY: Michael L. Charters; California Plant Names: Latin and Greek Meanings and Derivations; A Dictionary of Botanical and Biographical Etymology; (accessed 11/14/2019)
http://www.calflora.net/botanicalnames/pageF.html