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Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. 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.
Annual, taprooted, hairy or bristly.
Stem: spreading or erect, branched.
Leaf: blade lanceolate to triangular, 1-pinnately dissected.
Inflorescence: umbels compound, terminal or opposite leaves, peduncled or sessile; bracts generally 0 or small; bractlets several, thread-like to linear; rays 0–few, spreading- ascending; pedicels 0 or short.
Flower: generally ± bilateral; calyx lobes 0 or evident; petals obcordate, white or ± red, tips narrowed, outer petals ± > others; styles short.
Fruit: oblong to ovate, ± compressed side-to-side; 1° ribs thread-like, prickly, 2° ribs densely prickly or tubercled; oil tubes 1 per rib interval; fruit axis divided in distal 1/2.
Seed: face grooved.
10–15 species: Eurasia. (Name used by Adanson in 1763, meaning obscure)
1. Plant erect; umbel open, not head-like; outer, inner fruit-halves equally prickly ..... T. arvensis
1' Plant spreading; umbel dense, head-like; outer fruit-half prickly, inner tubercled only ..... T. nodosa
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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