Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



James C. Hickman

Annual to trees, some dioecious
Stem: nodes often swollen
Leaves simple, basal or cauline, alternate, opposite, or whorled, generally entire; stipules 0 or obvious and fused into a generally scarious sheath around stem
Inflorescence: small cluster, axillary or arrayed in cymes or panicles; involucres sometimes subtending 1–many flowers
Flower generally bisexual, small, ± radial; perianth generally 5–6-lobed, base ± tapered, often jointed to pedicel; stamens 2–9, often in 2 whorls; ovary superior, styles generally 3, generally fused at base
Fruit: achene, generally enclosed by persistent perianth, generally 3-angled, ovoid, and glabrous
Genera in family: 50 genera, 1100 species: worldwide, especially n temp; some cultivated for food (Fagopyrum ; Rheum , rhubarb; Rumex , sorrel) or ornamental (Antigonon , coral-vine; Muehlenbeckia ; Polygonum )
Reference: [Ronse Decraene & Akeroyd 1988 Bot J Linn Soc 98:321–371; Reveal et al. 1989 Phytologia 66(2–4):83–414]
Treatments of the 15 eriogonoid genera are based on the monographic work of James L. Reveal, who is gratefully acknowledged.



Annual, heterostylous, ± glabrous; flowers bisexual and staminate
Stem erect, 2–8 dm, hollow
Leaves cauline, alternate, petioled; stipules fused, sheathing stem above nodes; blade triangular-cordate to ± hastate
Inflorescence: short spike or ± flat-topped panicle
Flower: perianth lobes 5; stamens 8
Bisexual flower: styles 3, either short or long, stigmas 3, head-like
Fruit > calyx, sharply 3-angled
Species in genus: 15 species: especially temp Eurasia
Etymology: (Latin + Greek: beech wheat, from beechnut-like, edible fruit)


F. esculentum Moench

Plant becoming tinged with red
Stem < 6 dm
Leaf < 7 cm; blade ± triangular, generally longer than wide
Inflorescences in most axils, dense
Flower: perianth 3–4 mm, white; nectaries 8, yellow
Fruit 5–6 mm, shiny brown
Chromosomes: n=8
Ecology: Fields, disturbed places
Elevation: < 500 m.
Bioregional distribution: South Coast
Distribution outside California: native to Eurasia
Synonyms: F. sagitattum Gilib. invalid
Cult as grain, honey crop. TOXIC to livestock.

previous taxon | next taxon
bioregional map for FAGOPYRUM%20esculentum being generated

Retrieve Jepson Interchange Index to Plant Names entry for Fagopyrum esculentum
Retrieve dichotomous key for Fagopyrum
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California