Pediomelum pentaphyllum (L.) J. Grimes (redirected from: Psoralea pentaphylla)
Family: Fabaceae
small Indian breadroot,  more...
[Pediomelum pentaphyllum var. subulatum (Bush) J.W. Grimes,  more]
Pediomelum pentaphyllum image
Robert Sivinski  
Kearney and Peebles 1969, McDougal 1973
Duration: Perennial Nativity: Native Lifeform: Forb/Herb General: Herbaceous perennials, stems 20-30 cm tall, scapose, erect to decumbent, herbage glandular-punctate and conspicuously pubescent, (less so apically) the gray hairs appressed to spreading, plants arising from a thick tuber-like taproot. Leaves: Alternate, digitately 5-6 foliolate, leaflets lanceolate, rhombic, or ovate, 2-5 cm long, 1.5-2.5 cm wide, apex rounded to mucronate, margins entire to serrulate, sometimes appearing crisped and cupping upwards, densely hairy beneath, petioles 8-15 cm long, stipules scarious, lanceolate to linear, to 15 mm long. Flowers: With cream to light purple banners and deep purple keels, 12-18 mm long, calyx 4-5 mm long, lobes 10-22 mm long, enlarging considerably in fruit, very unequal, the upper 4 linear subulate, the lower 1 elliptic, about 3 mm wide in flower and to 7 mm in fruit; lower calyx lobe (in fruit glabrate) sparsely punctuate, with 3 prominent veins, inflorescences of dense, soft-hairy racemes, these globose to elongate, to 6 cm long, borne axillary or terminal. Fruits: Pods small, ovoid, indehiscent, 7-8 mm long, beak of fruit stout, flat, broad, 10-15 mm long, projecting somewhat beyond the calyx lobes. Seeds large, rather thick and of uniform thickness, markedly reticulate. Ecology: This species is extremely rare, found on sandy or gravelly soils in mesquite or yucca grassland communities and creosote-bush scrublands, from 3,500-6,500 ft (1067-1981 m); Flowering April-August. Distribution: Arizona, New Mexico Ethnobotany: This plant has been used by the Tarahumara people to reduce fever. Synonyms: Lotodes pentaphyllum (L.) Kuntze; Psoralea pentaphyllum L. Editor: LCrumbacher 2011 Etymology: Pediomelum comes from the Greek for "plain apple", while the meaning of pentaphyllum is unknown.
Pediomelum pentaphyllum image
Liz Makings  
Pediomelum pentaphyllum image
Arizona State University Herbarium  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069