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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

HELIOTROPIUM HELIOTROPE

Ronald B. Kelley & Dieter H. Wilken


Annual, perennial herb [shrub], glabrous to bristly or strigose. Stem: prostrate to erect, branched. Leaf: generally cauline, petioled to sessile, generally entire. Inflorescence: flower 1 in axils or many in terminal coiled spike-like cymes. Flower: corolla rotate to bell-shaped, white to purple; stamens attached on upper tube, included, anthers ± sessile; style 0 or not lobed, stigma 1, linear to disk-like. Fruit: nutlets 2 or 4, erect, generally ovoid to spheric, smooth, roughened, or hairy, scar generally lateral.
± 250 species: temperate, tropics. Ornamental, cultivated for medicinal drugs. (Greek: sun turning, from some species flowering at summer solstice)
Unabridged references: [Ewan 1942 Bull So Calif Acad Sci 41: 51–57]

Key to Heliotropium

1. Perennial herb

2. Stems, leaves not fleshy, short-soft-hairy; corolla purple ..... H. amplexicaule

2' Stems, leaves fleshy, glabrous; corolla white ..... H. curassavicum var. oculatum

1' Annual

3. Corolla 8–15+ mm diam; flowers 1 in axils; Desert ..... H. convolvulaceum var. californicum

3' Corolla 3–5 mm diam; inflorescence many in terminal coiled spikes; n&c Sierra Nevada Foothills, Great Central Valley, Central Coast, San Francisco Bay Area, Modoc Plateau ..... H. europaeum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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