Chenopodium sect. Pseudoblitum

Bentham & Hooker f.

Gen. Pl. 3: 52. 1880.

Treatment appears in FNA Volume 4. Treatment on page 282. Mentioned on page 276.

Plants annual. Leaf-blades triangular, narrowly triangular, or rhombic, glabrous. Flowers: perianth segments 3–4, connate nearly to apex or only at base, margins entire; stigmas 0.1–0.2 mm. Seeds vertical and horizontal.

Distribution

North America, Europe, Asia

Discussion

Species 2 (2 in the flora).

Chenopodium rubrum was selected as the type of Chenopodium by N. L. Britton and A. Brown (1913). Following that typification, this should be sect. Chenopodium. Chenopodium album was proposed as the lectotype of the genus by A. S. Hitchcock and M. L. Green (1929). It is now the “standing type” of the genus (W. Greuter et al. 1993; C. Jarvis et al. 1993), and we agree with that decision (S. L. Mosyakin and S. E. Clemants 1996). While acceptance of C. rubrum as the type would have no real consequences for our treatment here, this species has occasionally been placed in the genus Blitum (a segregate of Chenopodium), and if new evidence should suggest that this latter treatment should be followed then nomenclatural havoc would occur.

Selected References

None.

"narrower" is not a number.

dehiscent +  and indehiscent +
Steven E. Clemants +  and Sergei L. Mosyakin +
Bentham & Hooker f. +
slippery +
aromatic +
cuneate +, hastate +, cordate +  and truncate +
Undefined subg. Blitum +
flattened +, rhombic +, trullate +, triangular +, ovate +, lanceolate +, oblong +  and linear +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
North America +, Europe +  and Asia +
hippocrepiform +  and annular +
symmetric +, or +  and uniseriate +
dehiscent +  and indehiscent +
small white +
inflated +
sessile +  and petiolate +
not fleshy +
not winged +  and winged +
serrate +, sinuate +  and dentate +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
nonadherent +  and adherent +
chartaceous +  and membranaceous +
pointing +  and ascending +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
reddish-brown +, brown-black +  and black +
verrucate +  and striate +
horizontal +  and vertical +
lenticular +  and subglobose +
cylindric +
not imbricate +
keeled +  and rounded +
1 (?) +  and 5 (?) +
not armed +, not jointed +  and branched +
opposite +  and alternate +
erect +  and prostrate +
not fleshy +
filiform +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Chenopodium sect. Pseudoblitum +
Chenopodium subg. Blitum +
section +
dehiscent +  and indehiscent +
glabrous +  and pubescent +
polygamous +, dioecious +  and monoecious +
not imbricate +
keeled +  and rounded +