Atriplex prostrata

Boucher ex de Candolle in J. Lamarck and A. P. de Candolle

in J. Lamarck and A. P. de Candolle, Fl. Franç. ed. 3, 3: 387. 1805.

Common names: Thinleaf orach fat-hen
IntroducedIllustrated
Synonyms: Atriplex triangularis Willdenow
Treatment appears in FNA Volume 4. Treatment on page 336. Mentioned on page 323, 334.

Herbs, monoecious, erect, decumbent or procumbent, branching, 1–10 dm; stems subangular to angular, green or striped. Leaves opposite or subopposite at least proximally; petiole (0–) 1–3 (–4) cm; blade triangular-hastate, lobes spreading, 20–100 mm and almost as wide, base truncate or subcordate, margin entire, serrate, dentate, or irregularly toothed, apex acute to obtuse. Flowers in spiciform naked spikes 2–9 cm, sometimes forming terminal panicles; glomerules tight, contiguous or irregularly spaced. Fruiting bracteoles green, becoming brown to black at maturity, triangular-hastate to triangular-ovate, veined or veins obscure, 3–5 mm, thin to thickened, spongy, base truncate to obtuse, margin united at base, lateral angles mostly entire, apex acute, faces smooth or with 2 tubercles. Seeds dimorphic: brown, flattened, disc-shaped, 1–2.5 mm wide, or black, 1–1.5 mm wide; radicle subbasal, obliquely antrorse to spreading. 2n = 18.


Phenology: Flowering in summer–fall.
Habitat: Sea beaches, salt marshes or other saline habitats
Elevation: 0-2000 m

Distribution

V4 638-distribution-map.gif

Introduced; Alta., Man., N.B., N.S., Ont., P.E.I., Que., Sask., Ariz., Calif., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Oreg., Pa., R.I., Utah, Va., Wash., Eurasia

Discussion

Atriplex prostrata often grows with willow, tamarix, Scirpus (Schoenoplectus and Bulboschoenus segregates), Juncus, Distichlis, and Typha. Perhaps the phase along coastal eastern North America is indigenous, but this and the related Atriplex heterosperma evidently moved quickly from one palustrine habitat to another following subsequent introductions from the Old World. They were probably initially introduced as ballast waifs, and subsequently dispersed by waterfowl. The two species are now commonplace in lands within and adjacent to marshes in much of North America west of the initial sites of introduction.

The name for the species taken up here follows the nomenclatural interpretation of J. McNeill et al. (1983).

Selected References

None.

Lower Taxa

None.
... more about "Atriplex prostrata"
Acute (?) +  and Obtuse (?) +
Stanley L. Welsh +
Boucher ex de Candolle in J. Lamarck and A. P. de Candolle +
slippery +
aromatic +
truncate +  and obtuse +
triangular-hastate +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
linear +  and deltoid +
3-5-parted +
Thinleaf orach +  and fat-hen +
Alta. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ariz. +, Calif. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Oreg. +, Pa. +, R.I. +, Utah +, Va. +, Wash. +  and Eurasia +
0-2000 m +
with 2 tubercles +  and smooth +
tuberculate +  and smooth +
unisexual +  and bisexual +
not +  and connate +
enlarged +
spaced +, contiguous +  and tight +
Sea beaches, salt marshes or other saline habitats +
bladderlike +
terminal +  and axillary +
subopposite +  and opposite +
deciduous +  and persistent +
not winged +  and winged +
serrate +  and entire +
toothed +  and dentate +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
(1-)3-5-lobed +
papery +  and chartaceous +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering in summer–fall. +
in J. Lamarck and A. P. de Candolle, Fl. Franç. ed. +
obliquely antrorse +  and spreading +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
Black (?) +  and Brown (?) +
disc--shaped +  and flattened +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Introduced +  and Illustrated +
naked +  and spiciform +
cylindric +
2 cm20 mm <br />0.02 m <br /> (9 cm90 mm <br />0.09 m <br />) +
3 (?) +  and 5 (?) +
opposite +  and alternate +
striped +  and green +
subangular +  and angular +
succulent +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Atriplex triangularis +
Atriplex prostrata +
Atriplex sect. Teutliopsis +
species +
dicotyledonous +
brown +  and black +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
thin +  and thickened +
herb +, procumbent +  and decumbent +