Directory       News       Site Map       Home
         
    Jepson eFlora
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.

 

CICUTA WATER-HEMLOCK
Perennial herb, glabrous; rhizome internally chambered, sap becoming ± red-brown in air, fibrous- or tuberous-rooted. Stem: erect, hollow. Leaf: blade oblong to triangular-ovate, 1–3-pinnate or ternate-pinnate, leaflets linear to lance-ovate, serrate or irregularly cut. Inflorescence: umbels compound; bracts generally 0; bractlets generally inconspicuous; rays, pedicels many, spreading. Flower: calyx lobes minute; petals wide, white, tips narrowed. Fruit: ovoid to spheric, ± compressed side-to-side; ribs low, corky, occasionally unequally spaced; oil tube 1 per rib-interval; fruit axis divided to base. Seed: face flat or concave.
± 4 species: Eurasia, North America. (Ancient Latin name) TOXIC: the most lethally toxic native plant species [Lee & Downie 2006 Canad J Bot 84:453–468]
Unabridged references: [Mulligan 1980 Canad J Bot 58:1755–1767]
Unabridged note: Both species below contain cicutoxin, a strong poison; many livestock and human deaths recorded.

Key to Cicuta

1. Fruit generally round, rib width >> intervals between; areas surrounded by veins on abaxial leaf surface rough-textured, generally some elongate ..... C. douglasii

1' Fruit generally ovate, rib width generally <= intervals between; areas surrounded by veins on abaxial leaf surface smooth, generally rounded or square ..... C. maculata

2. Leaf generally 1–2-pinnate; styles < 1 mm; inland ..... var. angustifolia

2' Leaf generally 2-pinnate; styles generally > 1 mm; coastal ..... var. bolanderi

Contact/Feedback

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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.