Atriplex patula

Linnaeus

Sp. Pl. 2: 1053. 1753.

Common names: Spear orach spearscal e
IntroducedIllustrated
Synonyms: Atriplex hastata subsp. patula (Linnaeus) S. Pons Atriplex hastata var. patula (Linnaeus) Farwell Teutiopsis patula
Treatment appears in FNA Volume 4. Treatment on page 333. Mentioned on page 322, 324.

Herbs, monoecious or subdioecious, (1.5–) 3–9 (–15) dm. Stems mostly erect and branched, branches green, obtusely angled or striate, glabrate. Leaves alternate except the proximalmost, petiolate; blade green on both sides, rhombic-lanceolate to lanceolate, oblong, or narrowly lance-oblong or hastate-ovate, 25–120 × 3–40 (–75) mm, entire or toothed, proximal ones broadly cuneate or sometimes hastate subbasally with obliquely antrorse basal lobes, distal cauline leaves lanceolate and entire. Flowers compact or interrupted spiciform or paniculiform clusters. Staminate flowers mostly 5-merous. Fruiting bracteoles green becoming black, rhombic to rhombic-triangular, or ovate-rhombic, compressed, ± uniformly sized, 2–7 (–20) mm, base mostly hastate, acute, margin united almost to middle, entire or sparingly toothed, surfaces tuberculate. Seeds dimorphic: brown, 2.5–3 (–3.5) mm wide, or black, 1–2 mm wide; radicle of brown seeds subbasal to median, antrorse. 2n = 36.


Phenology: Flowering summer–fall.
Habitat: Widespread ruderal weed of nonsaline substrates such as fields, gardens, and roadsides
Elevation: 0-2100 m

Distribution

V4 630-distribution-map.gif

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Sask., Yukon, Ala., Alaska, Calif., Colo., Del., D.C., Idaho, Ill., Ind., Iowa, Maine, Md., Mass., Mich., Mo., Mont., Nev., N.H., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.Dak., Utah, Vt., Va., Wis., Wyo., Europe, Asia, n Africa

Discussion

Atriplex patula appears to have been a rather recent introduction in North America from Eurasia, not arriving perhaps until sometime in the early to mid-eighteenth century. It simulates depauperate specimens of A. dioica, A. glabriuscula, and other similar species when leaves are reduced to a near-linear profile. Such specimens are difficult if not impossible to assign to any of the species.

Selected References

None.

Lower Taxa

None.
... more about "Atriplex patula"
Stanley L. Welsh +
Linnaeus +
slippery +
aromatic +
acute +  and hastate +
4 cm40 mm <br />0.04 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (12 cm120 mm <br />0.12 m <br />) +
toothed +, entire +, rhombic-lanceolate +  and lanceolate oblong or narrowly lance-oblong or hastate-ovate +
3mm;40mm +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
linear +  and deltoid +
3-5-parted +
Spear orach +  and spearscal e +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Calif. +, Colo. +, Del. +, D.C. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Md. +, Mass. +, Mich. +, Mo. +, Mont. +, Nev. +, N.H. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.Dak. +, Utah +, Vt. +, Va. +, Wis. +, Wyo. +, Europe +, Asia +  and n Africa +
0-2100 m +
tuberculate +  and smooth +
5-merous +, staminate +, paniculiform +, spiciform +, interrupted +  and compact +
unisexual +  and bisexual +
not +  and connate +
enlarged +
Widespread ruderal weed of nonsaline substrates such as fields, gardens, and roadsides +
bladderlike +
terminal +  and axillary +
deciduous +  and persistent +
not winged +  and winged +
entire +  and serrate +
toothed +  and entire +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
(1-)3-5-lobed +
papery +  and chartaceous +
Flowering summer–fall. +
hastate +  and cuneate +
lateral +, basal +  and inferior +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
Brown (?) +  and Black (?) +
flattened +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Introduced +  and Illustrated +
cylindric +
3 (?) +  and 5 (?) +
opposite +  and alternate +
succulent +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
tuberculate +
Atriplex hastata subsp. patula +, Atriplex hastata var. patula +  and Teutiopsis patula +
Atriplex patula +
Atriplex sect. Teutliopsis +
species +
dicotyledonous +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
green becoming black +
compressed;rhombic;rhombic-triangular or ovate-rhombic +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
subdioecious +  and monoecious +