Flora of North America species comparison

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Dysphania sect. Adenois
Habit Plants annual or perennial.
Leaf

blades with margins entire to pinnatifid.
Inflorescences

linear-spicate or spicate-paniculate, ± foliose with flowers clustered in dense glomerules.
Flowers

perianth segments (3–)4–5, connate basally;

stamens 4–5;

styles (2–)3(–5).
Seeds

mostly horizontal (vertical in D. chilensis, sometimes vertical in D. ambrosioides and D. anthelmintica).

Dysphania sect. Adenois
Distribution
Native to South and Central America (now nearly worldwide from tropics to warm-temperate regions)
Discussion

Species 14 or 15 (4 in the flora).

Several researchers have treated this section as having a single, highly polymorphic species, Dysphania ambrosioides sensu lato (Chenopodium ambrosioides). Others recognize between two and twelve species (P. Aellen 1929, 1960–1961; P. Aellen and T. Just 1943; V. N. Voroschilov 1942; L. E. Simón 1996, 1997; L. Giusti 1997). We feel that the following four species represent good taxa. There are additional taxa or variations in North America that have not been accounted for here. In particular, the variation in leaf and bract shape and bract size have not been fully recognized. Most of this variation would fall within our concept of D. ambrosioides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 269.
Parent taxa Chenopodiaceae > Dysphania
Subordinate taxa
Synonyms Ambrina section Adenois
Name authority (Moquin-Tandon) Mosyakin & Clemants: Ukrayins’k. Bot. Zhurn., n. s. 59: 382. (2002)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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