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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Elizabeth McClintock

Annual to perennial herb, rarely shrub, sometimes armed with prickles
Stem generally branched
Leaves simple, generally in basal rosettes and cauline, generally opposite, ± fused at base around stem, entire, toothed, or pinnately lobed or dissected, petioled or sessile; stipules 0
Inflorescence: head, terminal, on long peduncle, many-flowered, dense, ± spheric or cylindric, subtended by involucre; each flower generally enclosed ± at base by an involucel of 1–2 generally fused bractlets, this generally expanded above or in fruit, generally subtended by a receptacle bract
Flower bisexual, ± bilateral, especially outermost; calyx limb cup-shaped or divided into 4–5(10) linear or bristle-like segments; corolla ± funnel-shaped, lobes 4–5, < tube, generally unequal; stamens generally 4, attached to corolla tube, alternate lobes; ovary inferior, 1-chambered, style slightly exserted from corolla, stigma 2-lobed
Fruit: achene, enclosed by sometimes enlarged involucel, generally topped by persistent calyx
Genera in family: 10–11 genera, 270–350 species: Eur to e Asia, c&s Africa; several cultivated for ornamental
Reference: [Moore 1976 Flora Europaea 4:56–72]



Biennial, armed with prickles, sometimes ± throughout
Stem erect, generally < 2 m, stout, few-branched, rough-hairy
Leaf generally < 5 dm, entire or toothed
Inflorescence generally ± cylindric; involucre bracts unequal, > flowers, linear, stiff; receptacle bract ending in a spine
Flower: calyx limb cup-shaped, 4-lobed, persistent; corolla generally lavender, rarely white, tube long, lobes 4, unequal; stamens 4
Fruit 4-angled, hairy
Species in genus: ± 15 species: Eur, w Asia, Africa
Etymology: (Greek: thirst, from leaf bases that in some species hold water)
Reference: [Ferguson & Brizicky 1965 J Arnold Arb 46:362–365]


D. sativus (L.) Honck.


Leaves: pairs fused around stem, sometimes deeply so
Inflorescence 5–10 cm, ovoid to ovoid-cylindric
Fruit ± 6–8 mm
Chromosomes: 2n=16,18
Ecology: Disturbed areas, fields, vacant lots, old pastures
Elevation: < 800 m.
Bioregional distribution: North Coast, Outer North Coast Ranges, San Francisco Bay Area, South Coast Ranges, Peninsular Ranges
Distribution outside California: native to Europe
Synonyms: D. fullonum L., D. sylvestris Huds. misapplied
Fr head long used to raise nap on woolen cloth.

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bioregional map for DIPSACUS%20sativus 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 Dipsacus sativus
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