|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Polygonaceae||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual, glabrous; monoecious. Stem: decumbent to erect, 1--8 dm, base often +- red. Leaf: cauline, alternate, petioled; ocrea soon torn, falling; blade +- hastate to cordate. Staminate Inflorescence: axillary, terminal, raceme-like; flowers 1--8. Pistillate Inflorescence: axillary, spike-like; flowers 1--8. Staminate Flower: perianth parts 5--6, free; stamens 4--6. Pistillate Flower: perianth parts 6, fused; outer 3 spine-tipped in fruit, inner 3 tubercled; styles 3, free. Fruit: included, 2--4.5 mm, ovate, shiny, spines 3; perianth hardened. Chromosomes: 2n=20.
Species In Genus: 2 species: native to Mediterranean, South Africa, spread worldwide. Etymology: (Latin: removal from Rumex) Note: Hybrids occur readily when species together; highly sterile when self-pollinated but can backcross with either parent to form viable seeds.
eFlora Treatment Author: Mihai Costea
Jepson Online Interchange
Key to EmexPrevious taxon: Dodecahema leptoceras
Next taxon: Emex australis
Citation for this treatment: Mihai Costea 2016. Emex, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11208, accessed on December 07, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 07, 2016.