|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
|Family: Apiaceae (Umbelliferae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Perennial herb, glabrous; roots clustered, fibrous or +- tuberous. Stem: erect or ascending, branched. Leaf: blade oblong to ovate, 1-pinnate, occasionally 2-pinnate when submerged, leaflets distinct, serrate, irregularly cut to pinnately lobed. Inflorescence: umbels compound, generally opposite a leaf; bracts, bractlets leaf-like, generally reflexed, conspicuous; rays, pedicels many, spreading-ascending. Flower: occasionally +- bilateral; calyx lobes 0 or minute; petals wide, white, narrowed at tips, outer +- > others. Fruit: ovate to round, +- compressed side-to-side; ribs prominent, +- equal, corky; oil tubes 1--3 per rib-interval; fruit axis entire or divided to base, adhering to fruit halves or not. Seed: face flat. Chromosomes: 2n=12.
Species In Genus: +- 10 species: North America, Eurasia, Africa. Etymology: (Greek: for an aquatic member of family)
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax
Jepson Online Interchange
Previous taxon: Scandix pecten-veneris
Next taxon: Sium suave
Citation for this treatment: Lincoln Constance & Margriet Wetherwax 2016. Sium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=10223, accessed on May 26, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 26, 2016.