Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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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. coccinea Mill.


Stem prostrate or sprawling, < 15 dm; glandular-hairy
Leaf: blade broadly ovate, blunt, slightly wavy
Inflorescence: head
Flower 2 mm; perianth red-violet
Fruit 2.5–3.5 mm, hairy; tip rounded; wide and smooth between ribs
Ecology: Dry disturbed places
Elevation: < 1000 m.
Bioregional distribution: s San Joaquin Valley, South Coast, Peninsular Ranges (Santa Ana Mtns), Sonoran Desert
Distribution outside California: to se US, nw S.America
Flowering time: Apr–Jul
Horticultural information: DRN, DRY, SUN: 8, 9, 11, 12, 13.

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bioregional map for BOERHAVIA%20coccinea being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Boerhavia coccinea
Retrieve dichotomous key for Boerhavia
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