Dysphania sect. Adenois

(Moquin-Tandon) Mosyakin & Clemants

Ukrayins’k. Bot. Zhurn., n. s. 59: 382. 2002.

Basionym: Ambrina sect. Adenois Moquin-Tandon Chenop. Monogr. Enum., 39. 1840
Treatment appears in FNA Volume 4. Treatment on page 269. Mentioned on page 267, 268.

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).

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.

Selected References

None.

... more about "Dysphania sect. Adenois"
mucronate +, acuminate +, attenuate +, acute +  and obtuse +
Steven E. Clemants +  and Sergei L. Mosyakin +
(Moquin-Tandon) Mosyakin & Clemants +
slippery +
aromatic +
cuneate to truncate +
Ambrina sect. Adenois +
lobed +, elliptic +, ovate +, oblanceolate +, lanceolate +  and linear +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
Native to South and Central America (now nearly worldwide from tropics to warm-temperate regions) +
symmetric +, or +  and uniseriate +
unisexual +  and bisexual +
aromatic +
glabrescent +
foliose +  and linear-spicate +
spicate-paniculate +
reduced +
not winged +  and winged +
serrate +, dentate +  and entire +
entire +  and pinnatifid +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
nonadherent +  and adherent +
membranaceous +
Ukrayins’k. Bot. Zhurn., n. s. +
pointing +  and ascending +
basal +, median +  and position +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
smooth +  and rugose +
black +  and reddish-brown +
subglobose +  and lenticular +
cylindric +
4 +  and 5 +
not jointed +  and branched +
opposite +  and alternate +
prostrate +  and decumbent +
ascending +  and erect +
not fleshy +
1 +  and 3 +
filiform +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Dysphania sect. Adenois +
Dysphania +
section +
perennial +  and annual +
polygamous +, dioecious +  and monoecious +