Jepson Flora Project: Jepson Interchange    

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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.



Richard Spellenberg

Perennial, shrub, tree, glabrous or hairy
Stem often forked
Leaves opposite, sessile or petioled, pairs generally unequal; blade generally entire
Inflorescence generally forked; of spikes, clusters, or umbels, each unit sometimes with a calyx-like involucre
Flower bisexual, radial; perianth of 1 whorl, petal-like, bell- to trumpet-shaped, base hardened, tightly surrounding ovary in fruit, lobes 4–5, generally notched to ± bilateral; stamens 1–many; ovary superior (appearing inferior because of hardened perianth base), style 1
Fruit: achene or nut, smooth, wrinkled, or ribbed
Genera in family: 30 genera, 300 species: warm regions, especially Am; some ornamental (Bougainvillea ; Mirabilis , four o'clock).



Annual, perennial herb
Stem prostrate to erect; internode often with sticky area
Leaf petioled; blade 1–6 cm, paler beneath, often brown-dotted
Inflorescence openly branched; unit a raceme, umbel, or head; bracts 1–3, free, not forming an involucre
Flower: perianth < 30 mm, bell-shaped, closing by afternoon; stamens 1–5; stigma ± spheric, generally exserted
Fruit < 3.5 mm, club-shaped; ridges 4–5; wings 0
Species in genus: ± 30 species: warm regions. B. spicata Choisy (fruit ribs narrow, acute) is widespread in sw US, expected as agricultural weed near Mex border
Etymology: (H. Boerhaave, Dutch botanist, 1668–1738)


B. intermedia M.E. Jones

Stem ascending or erect, 2–5 dm; hairs fine, sparse
Leaf: blade broadly lanceolate or ovate, acute to obtuse
Inflorescence openly branched; flowers in small umbel-like clusters at branch tips
Flower 1.5–2 mm; perianth white to pale pink
Fruit 2–2.7 mm, glabrous; wrinkled between sharp ribs; tip truncate
Ecology: Gravelly washes, flats
Elevation: < 1300 m.
Bioregional distribution: e Desert Mountains (Clark, Kingston mtns), e Sonoran Desert
Distribution outside California: to Texas, Mexico
Flowering time: Aug–Oct
Synonyms: B. erecta var. i. (M.E. Jones) Kearney & Peebles
B. erecta L. (fruit 3–4.5 mm) is widespread in tropical Am, expected as agricultural weed near Mex border.

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bioregional map for BOERHAVIA%20intermedia being generated
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

Retrieve Jepson Interchange Index to Plant Names entry for Boerhavia intermedia
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Overlay Consortium of California Herbaria specimen data by county on this map
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